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Digital Panel Instruments MDA241/ MDV241/ MDC241

06/07

3

- 7

3

Description

Technical Data

Measuring Ranges 

MDA241

MDV241

MDC241

Digital panel instruments type MD.241 are designed to measure,
display, and monitor either DC and AC currents (MDA241), DC and
AC voltages (MDV241), or temperature (MDC241) in industrial
applications.
The instruments are panel mounted with a front frame dimension of 
96 x 24 mm and a mounting depth of 89 mm, and are available with 
3 1/2 digit 7-segment LED display covering various measuring ranges.
The supply voltage range of DC 12 V...26 V, physically isolated from
the measuring circuit, allows a wide spread of applications.

Display

Red 7-segment LED display
3 1/2 digit, 13 mm high
Full scale range: 1999 digits
Over-range indication:
The last 3 digits will extinguish

Reading characteristics

Integrating dual-slope
Count rate: 2.5 readings/second 
Setting time for a 100 % reading change: < 3 s

Accuracy of display (at 23 °C) 

Current/Voltage DC version 

≤ 0.1 % span ± 1 digit

Current/Voltage AC version

≤ 0.2 % span ± 1 digit

Temperature 0.1 K resolution

≤ 0.1 % span ± 1 digit

Temperature    1 K resolution

≤ 0.3 % span ± 1 digit

(span = full measuring range)

Input

General (MD.241): Physically isolated from mains

Common mode range:

input circuit against 
main circuit 

± 600V

Common mode rejection:

≥ 60dB

Temperature instrument  MDC 241: Pt100 connected in 2-conductor

circuit. Line resistance may be 
corrected between 0...10 

Ω

by 

means of the potentiometer 
accessible from the front.

Sensor current:

approx. 1 mA

Overload protection:

25 V

Environmental requirements

Temperature drift:

≤ 0.1 % span/10 K

Warm-up to full accuracy:

15 minutes

Operating temperature range:

0...+50 °C 

Storage temperature range:

-20...+70 °C 

Relative humidity: 

0...75 % annual average, 
95 % max.
(without condensation)

Voltage supply (voltage rating):

DC 12 V...26 V  physically isolated from the measuring input.
Max. allowed residual ripple 10 %, but not less than the minimum
voltage or more than the maximum voltage.
Power consumption:

≤ 3 W

DC Current

Measuring Resolution

Input

Overload protection    Pin designation

range

resistance

cont.      max. 3 sec.

Lo - Hi

–   +

±2 mA

1 µA

100 

Ω

50 mA

100 mA

3 - 1

±20 mA

10 µA

10 

Ω

160 mA

300 mA

3 - 1

±200 mA

0.1 mA

1 

Ω

600 mA

1.5 A

3 - 1

±2 A

1 mA

0.1 

Ω

3 A

5 A

3 - 1

AC Current, frequency range 15 Hz...1 kHz

2 mA

1 µA

100 

Ω

50 mA

100 mA

3 - 1

20 mA

10 µA

10 

Ω

160 mA

300 mA

3 - 1

200 mA

0.1 mA

1 

Ω

600 mA

1.5 A

3 - 1

2 A

1 mA

0.1 

Ω

3 A

5 A

3 - 1

DC Voltage

Measuring Resolution

Input

Overload protection

Pin designation

range

resistance

continuous

Lo - Hi

–   +

±200 mV

0.1 mV

≥10 M

Ω

150 V

3 - 1

±2 V

1 mV

≥10 M

Ω

500 V

3 - 1

±20 V

10 mV

10 M

Ω

1000 V

3 - 1

±200 V

0.1 V

10 M

Ω

1000 V

3 - 1

±600 V

1 V

10 M

Ω

1000 V

3 - 1

AC Voltage, frequency range 15 Hz...1 kHz

200 mV

0.1 mV

≥10 M

Ω

150 V

3 - 1

2 V

1 mV

≥10 M

Ω

500 V

3 - 1

20 V

10 mV

10 M

Ω

1000 V

3 - 1

200 V

0.1 V

10 M

Ω

1000 V

3 - 1

600 V

1 V

10 M

Ω

1000 V

3 - 1

Temperature

Sensor

Measuring range

Resolution         Pin designation

in °C

Pt100 (IEC751)

0...+300 °C

1

1 - 2

Pt100 (IEC751)

+250...+800 °C

1

1 - 2

Pt100 (IEC751)

-200...+200 °C

1

1 - 2

Pt100 (IEC751)

-100.0...+100.0 °C

0.1

1 - 2

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

www.e-t-a.com

06/07

3

- 8

3  

Ordering information

Case

Terminations

Connector pin assignment

Selector chart

Type No.

Physical dimension
A

Current

V

Voltage

C

Temperature

Case
241

96 mm x 24 mm

Version
D

DC

A

AC

W

resistance temperature detector (RTD)

Display
3

3 1/2 digit

Measuring range
11

2mA/200 mV

12

20 mA/2 V

13

200 mA/20 V

14

2 A/200 V

15

600 V

54

IEC 751 Pt100 0...+300 °C

55

IEC 751 Pt100 +250...+800 °C

56

IEC 751 Pt100 -200...+200 °C

57

IEC 751 Pt100 -100.0...+100.0 °C

Power supply (rated voltage)
D1

DC 12 V...26 V physically isolated

K

Special marking
(see below for standard markings)*)

Special calibration

**)

F

OEM branding*)

MD V

241  -

A 3

13 D1

...

...

ordering example

*) Clearly add desired marking.
**) Specify when ordering.

Standard markings:

V, mV, kV, MV, A, mA, kA, kW, MW, °C, %, % r.F., ms, Stück, Ohm, pH, µs, l, N,
kN, kg, t, lbf, NCM, Nm, m, cm, mm, km, inch, bar, mbar, Pa, hPa, psi kg/cm

2

,

mmWs, mWs, N/m

2

, N/mm

2

, Hz, kHz, U/min, min

-1

, sec

-1

, rpm, l/h, l/min,

kg/h, m

3

/h, m/min, m/sec, t/h.

Digital panel instrument

96 mm x 24 mm

(3.78 in. x .945 in.)

3 1/2 digit

mA
mA
mA
A

current

Case:

Display:

Power supply:
(rated voltage)

Function:

Input:

Front glass
marking:

12 V…26 V physically isolated

voltage

temperature

DC

AC

Pt100

 mV
 V
 V
 V
 V

0…+300 °C
+250…+800 °C
-200…+200 °C
-100.0…+100.0 °C

Measuring
range:

OEM branding

200
2
20
200
600

2
20
200
2

Fig. 4

Fig. 2

Rear view

Fig. 3

Side view

mounting bracket

91.5

 

+ 0.2

22 

+ 0.2

96

89

78

24

max. 4

max. R1

1

2

3

4

7

8

5

min. 8

Fig. 1

terminal strips

1

2

3

4

7

8

Front view

Panel cut-out

3.07

3.50

3.78

.945

3.60

 

+ .008

.866 

+.008

min .315

max .157

max .039

.197

Caution:
If several instruments are to be fitted, a minimum of 8 mm (5/16 in)
between each cut-out must be provided for correct removal of front
glass (Fig. 4).
Case material:

glass-fibre reinforced black Noryl SE 1 

Degree of protection:

IP50 (front), IP20 (rear)

Applicable specification:

VDE 0411 part 100

Pollution degree: 

3 to IEC 664 and 664 A

Instrument mass:

approx. 150 g

Plug-in screw-terminal strip for max. 1.5 mm

2

/AWG 16 cables.

signal inputs

current/voltage

DC

rated

voltage

12…26 V

+

-

1

2

3

4

7

8

+

-

L

Hi

signal inputs

current/voltage

AC

rated

voltage

12…26 V

1

2

3

4

7

8

+

-

temperature

2 conductor circuit

rated

voltage

12…26 V

shield

1

2

3

4

7

8

+

-

Pt100

This is a metric design and millimeter dimensions take precedence (

mm 

)

inch

All dimensions without tolerances are for reference only. In the interest of improved design,
performance and cost effectiveness the right to make changes in these specifications without
notice is reserved. Product markings may not be exactly as the ordering codes. Errors and
omissions excepted.

Digital Panel Instruments MDA241 / MDV241 / MDC241

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

www.e-t-a.com

Digital Panel Instruments MDK241 / MDR241

06/07

3

- 9

3

DC Current

Measuring

Input

Overload protection

Pin

input

resistance

cont.

max. 3 s

designation

+    –

0...±20 mA

100 

Ω

± 50 mA

± 100 mA

1 -  2

4...20 mA

100 

Ω

± 50 mA

± 100 mA

1 -  2

DC Voltage

Measuring

Input

Overload protection   

Pin

input

resistance

continous designation

+    –    

0...±5 V

0,5 M

Ω

± 100 V

1 -  2

0...±10 V

1 M

Ω

± 100 V

1 -  3

Full scale range: 0...2000 digits
(optionally indicating either in the positive or negative direction)
Initial value: -1170...+1170
User selectable decimal point.
Please specify physical unit when ordering.

9

Description

Technical data

Measuring ranges: Process Variables  

Measuring Ranges: Pressure

Digital panel instruments type MD.241 are designed to measure,
display, and monitor either pressure (MDR241) or process variables
(MDK241) in industrial applications.
The instruments are panel mounted with a front frame dimension of 
96 mm x 24 mm and a mounting depth of 89 mm, and are available
with 3 1/2 digit 7-segment LED display covering various measuring
ranges.
The supply voltage range of DC 12 V...26 V, physically isolated from
the measuring circuit, allows a wide spread of applications.
Initial value, full scale range and decimal point may be set by internal
jumpers and adjusted by means of the potentiometer accessible from
the front.
The pressure measuring instrument MDR241 provides DC 24 V/20 mA
to  supply a transmitter. 

Display

Red 7-segment LED display, 13 mm high
3 1/2 digit
Over-range indication: The last 3 digits will extinguish

Reading characteristics

Integrating dual-slope
Count rate: 2.5 readings/s
Setting time for a 100% reading change: < 2 s

Accuracy of display (at 23°C)

Versions MDK/MDR: 

≤ 0.1% span ±1 digit

(span = full measuring range)

Input

MDK/MDR: Physically isolated from mains
Common mode range: 

input circuit against main circuit: ± 300 V
common mode rejection:

≥ 80 dB

Output

Pressure instrument MDR241:
auxiliary voltage output to supply an      
electronic transmitter
Voltage:

DC 24 V ± 15%

Current:

25 mA max.

Residual ripple: 

≤ 0.5%

Pins:    

5 (+) and 6 (-)

Voltage output physically isolated from measuring input and mains.

Environmental requirements

Temperature drift:

≤ 0.1 % span/10 K

Warm-up to full accuracy:

≤ 15 minutes

Operating temperature range:

0...+50°C 

Storage temperature range:

-20...+70°C

Relative humidity 

0...75 % annual average, 
95 % max.
(without condensation)

Voltage supply (voltage rating):

DC 12 V...26 V physically isolated from the measuring input.
Max. allowed residual ripple 10 %, but not less than the 
minimum voltage or more than the maximum voltage.
Power consumption:

MDK

≤ 3 W

MDR

≤ 4 W

MDK241

MDR241

Input

Measuring

Input

Overload protection

Pin

range

resistance    cont.

max. 3 s

designation

+     -

Voltage

0...5 V

0,5 M

Ω

± 100 V

-

1  -  2

Voltage

0...10 V

1 M

Ω

± 100 V

-

1  -  3

Current

0...20 mA

100 

Ω

± 50 mA

± 100 mA

1  -  2

Current

4...20 mA

100 

Ω

± 50 mA

± 100 mA

1  -  2

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

www.e-t-a.com

Digital Panel Instruments MDK241 / MDR241

06/07

3

- 10

3  

Ordering information 

Ordering information

Terminations

Connector pin assignment

Case

Rear view

Fig. 4

91.5

 

+ 0.2

22 

+ 0.2

max. 4

max. R1

min. 8

Panel cut-out

3.60

 

+ .008

.866 

+.008

min .315

max .157

max .039

mounting bracket

89

78

5

Fig. 1

3.07

3.50

.197

Fig. 2

96

24

Front view

3.78

.945

1

2

3

4

7

8

1

2

3

4

7

8

5

6

Side view

Fig. 3

MDK241

MDR241

terminal strips

terminal strips

signal inputs

current DC 0/4..20mA

voltage DC 5 V

1

+

-

rated

voltage

12…26 V

shield

2

3

4

7

8

+

-

1

+

-

rated

voltage

12…26 V

2

3

4

7

8

signal inputs

voltage DC 10 V

shield

+

-

transmitter

connectors

DC 0/4..20mA

DC 5 V

1

+

-

rated

voltage

12…26 V

2

3

4

7

8

+

-

5

6

+

-

aux.

voltage

output

transmitter

connectors

voltage input

DC 10 V

1

+

-

rated

voltage

12…26 V

2

3

4

7

8

+

- shield

5

6

+

-

aux.

voltage

output

input

24V- supply
for transmitter

shield

input

24V- supply
for transmitter

Plug-in screw-terminal strip for max. 1.5 mm

2

/AWG 16 cables.

Caution:

If several instruments are to be fitted, a minimum of 8 mm (5/16 in)
between each cut-out must be provided for correct removal of front
glass. (Fig. 4)
Case material:

glass-fibre reinforced black Noryl SE1 

Degree of protection:

IP50 (front), IP20 (rear)

Applicable specification:

VDE 0411, part 100

Pollution degree: 

3 to IEC 664 and 664 A

Instrument mass:

approx. 150 g

MDK241:

MDR241:

Type No. 

Physical dimension
K

Standard signals

Case
241

96 mm x 24 mm

Inputs
X

User selectable standard signals (0..20 mA; 4..20 mA; 0..5 V;

or 0..10 V)

0

Special measuring range *)

Display
3

3 1/2 digit

Display range: initial value
0

-1170...+1170 digits (user selectable)

Full scale range
X

0...2000 digits (user selectable)

Decimal point
X

Decimal point (user selectable)

Voltage supply (voltage rating)
D1

DC 12...26 V 

K

factory pre-set
marking (unit)

F

OEM branding *) 

MD

K   241 - X

3

0

X

X

D1 ...

...

ordering example

*)  Clearly add desired specification.

Type No. 

Physical dimension
R

Pressure

Case
241

96 mm x 24 mm

Input
A

Standard signal 0...10 V

B

Standard signal 0...20 mA

C

Standard signal 4...20 mA

E

Standard signal 0...5 V

X

User selectable standard signals

0...20 mA; 4...20 mA; 0...5 V
or 0...10 V

Display
3 

3 1/2 digit

Measuring range
1

0...250

2

0...400

3

0...600

4

0...1000

5

0...1600

6

0...1999

0

Special measuring range *)

X

User selectable: initial value -1170...+1170 digits
full scale range 0...2000 digits

Decimal point
T

1999

H

199.9

Z

19.99

E

1.999

X

Decimal point (user selectable)

Marking (physical unit)
1

bar

2

mbar

3

kPa

4

psi

5

N/m

2

6

N/mm

2

9

blank

0

special marking (see below for standard markings) *)

Supply voltage (voltage rating)
D1

DC 12...26 V  with physical isolation

K

special calibration*)

F 

OEM branding*)

MD  R 

241 - A 3    2 

H    4

D1  . F

ordering example

*) Clearly add desired specification.

Standard markings: 

V, mV, kV, MV, A, mA, kA, kW, MW, °F, °C, %, % r.F., ms, Stück, Ohm, pH, µs,
l, N, kN, kg, t, lbf, Ncm, Nm, m, cm, mm, km, inch, bar, mbar, Pa, hPa, psi, 
kg/cm

2

, mmWs, mWs, N/m

2

, N/mm

2

, Hz, kHz, U/min, min

-1

, sec

-1

, rpm, l/h, 

l/min, kg/h, m

3

/h, m/min, m/sec, t/h

All dimensions without tolerances are for reference only. In the interest of improved design,
performance and cost effectiveness the right to make changes in these specifications without
notice is reserved. Product markings may not be exactly as the ordering codes. Errors and
omissions excepted.

This is a metric design and millimeter dimensions take precedence (

mm 

)

inch

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

www.e-t-a.com

Digital Panel Instruments MDA245 / MDV245 / MDC245

06/07

3

- 11

3

Description

Technical data

Measuring ranges

MDA245
MDV245

MDC245

Digital Panel instruments MD.245 are designed to measure and
display either DC currents (MDA245), DC voltages (MDV245), or
temperature (MDC245). The low supply current requirement (≤ 80 mA)
and the large voltage supply ranges permit a wide variety of uses.The
full-scale reading of the standard signal instruments is user-adjustable
within a range of approximately 500 digits (e.g. between 1000 and
1500), and jumpers for decimal point setting are provided on the
display pcb.
The instrument are panel mounted with a front frame dimension of 
48 mm x 24 mm.   

Display

Red 7-segment LED display
3 1/2 digit (MDA, MDV), or 2 1/2 digit (MDC),
10 mm high
Automatic mains value indication prefix "-"
Over-range indication: The last three digits are extinguished.

Accuracy of display (at 23°C)

Current/voltage measuring instrument: ≤ 0.1% span ±1 digit
Temperature measuring instrument:

≤ 0.8 % span

(span = full measuring range)

Reading characteristics

Integrating dual-slope
Count rate: 2.5 readings/second
Auto zero before each conversion.

Environmental requirements

Temperature drift:

≤ 0.01 % span/K

Warm-up to full accuracy:           

≤ 15 minutes

Operating temperature range:         0...+50 °C 
Storage temperature range:           -20...+70°C
Relative humidity:

0...75 % annual average, 
95 % max. 
(without condensation)

Application class:                  

KWF to DIN 40040

Instrument mass:                    

approx. 75 g

Voltage supply ranges:

DC 4 V - 7 V
DC 7 V - 16 V
DC 16 V - 28 V (standard)
not physically isolated from measuring input.
Maximum allowed residual ripple 10 %, but not less than the
minimum voltage or more than the maximum voltage.
Current consumption: ≤ 80 mA
The instruments are reverse polarity protected.
Max. wire size (max. wire dia. 1.4 mm):
1.0 mm

2

/AWG18 stranded wire

1.5 mm

2

/AWG16 single conductor (solid)

DC current

Measuring

Resolution

Input

Overload     

Pin

range

resistance

protection

designation

–

+

0...±20 mA

10 µA

10 

Ω

±150 mA

3

-

1

4...20 mA

8 µA

10 

Ω

±150 mA

3

-

1

DC voltage  

Measuring

Resolution

Input

Overload         Pin

range

resistance

protection

designation

–

+

0...± 5 V

2.5 mV

>1 M

Ω

±60 V

3

-

1

0...±10 V

5 mV

>1 M

Ω

±60 V

3

-

1

Temperature

Sensor

Measuring  

Resolution 

Terminals

range

Temperature sensor KTY-16-6

-30...+100 °C

1 °C

1

-

3

Temperature sensor
MSC KTY-16-6

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

www.e-t-a.com

Digital Panel Instruments MDA245 / MDV245 / MDC245    

06/07

3

- 12

3  

Ordering information for Panel Instruments MDA/MDV 245

Case

Connector pin assignment /Potentiometer setting

Ordering information for Panel Instrument MDC 245

terminal strips

Front view

Fig. 2

Side view

Fig. 1

44 

+ 0.2

21.5 

+ 0.2

77

24

fastening means

6

5

Fig. 3

Rear view

Fig. 4

Panel cut-out

48

44

42

3    2   1

8

21

5

mounting screw

5

4

11

.945

.846 

+.008

.157

.197

.827

.315

3.03

.197

1.73

1.65

1.89

1.73 

+ .008

.433

Case material: 

glass fibre reinforced black
Noryl GFN SE1

Degree of protection:  IP50 (front)

IP20 (rear)

Temperature instrument

Current/voltage instrument

1

2

3

5

6

1

)

2

)

offset correction (only with
measuring range 4…20 mA)

-

+

Power

-

+

Input

1

)

potentiometer to set reading range

2

)

1

2

3

5

6

-

+

Power

Sensor

jumper sockets
for decimal point
setting

jumper

Decimal point setting

Type No.

Physical dimensions
A

current

V

voltage

Case
245

48 mm x 24 mm

Version
D

DC current/voltage

Display
3

3 1/2 digit

Input
1

0...5 V

2

0...10V

3

0...20 mA

4

4...20 mA

Display range
1

0... (0...500)*

2

0... (500...1000)*

3

0... (1000...1500)*

4

0... (1500...1999)*

Supply voltage (rated voltage)
D1

DC 4...7 V

D2

DC 7...16 V

D3

DC 16...28 V (standard)

K

Special calibration**)

MD

A  245 - D

3

4

3

D3

...

ordering example

*) Set the final value within the range shown in parenthesis by means of the 

potentiometer.

**) Specify when ordering.

Type No.

Physical dimension
C

temperature

Case
245

48 mm x 24 mm

Version
H21

for temperature sensor KTY-16-6
Measuring range: -30...+100°C
2 1/2 digit display

Supply voltage (rated voltage)
D1

DC 4...7 V

D2

DC 7...16 V

D3

DC 16...28 V (standard)

MD

C

245 - H21

D3

ordering example

Ordering reference: MSC KTY-16-6
Technical data:

Sensor                  

KTY-16-6

Temperature range       

-30...+100°C 

Resistance              

2000

Ω

±1 % with 25°C 

Operating current      

≤ 0.5 mA

Temperature coefficient  0.75 %/K
Potted into nickel plated brass
housing with insulated leadwire
connections. 

Terminal selection

a

electrical contact

b electrical contact
c

housing: potential free

b

a

c

ø 3

±

0.15

stripped
ø 0.3mm/.012 in.
(wire)

12

±

0.5

ø 0.7

100

±

5

3

+1

.118

±

.006

.472

±

.020

3.94

±

.197

.028

.118

+.039

Temperature Sensor MSC (suitable for Instrument MDC 245)

All dimensions without tolerances are for reference only. In the interest of improved design,
performance and cost effectiveness the right to make changes in these specifications without
notice is reserved. Product markings may not be exactly as the ordering codes. Errors and
omissions excepted.

This is a metric design and millimeter dimensions take precedence (

mm 

)

inch

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

Voltage

DC, individual measuring range

Measuring

Resolution Input

Overload protection   Pin designation

range

with

resistance

continuously           

input    decimal pt.

3 1/2 digits    

-   + 

bridge

200 mV

0.1 mV

1 M

Ω

150 V

1 - 3

---

2 V

1 mV

4 M

Ω

500 V

1 - 3

---

20 V

10 mV

20 M

Ω

700 V

1 - 3

---

200 V

0.1 V

20 M

Ω

700 V

1 - 3

---

600 V

1 V

20 M

Ω

1000 V

1 - 3

---

DC, double measuring range 
200 mV

0.1 mV

440 k

Ω

150 V

2 - 5     7-10, 8-10

2000 mV 1 mV

4 M

Ω

500 V

1 - 3

---

20 V

10 mV

1.8 M

Ω

700 V

2 - 5     8-10

200 V

0.1 V

18 M

Ω

700 V

1 - 3     7-10, 8-10

AC, individual measuring range

Measuring  

Resolution Input 

Overload protection   Pin designation

range

with

resistance

continuously

input

decimal pt. 

3 1/2 digits    

Lo   Hi

bridge

200 mV

0.1 mV

>10 M

Ω

150 V

1 -  3

---

2 V

1 mV

>10 M

Ω

350 V

1 -  3

---

20 V

10 mV

2 M

Ω

350 V

1 -  3

--- 

200 V

0.1 V

10 M

Ω

700 V

1 -  3

---

600 V

1 V

10 M

Ω

1000 V

1 -  3

---

Current

DC, individual measuring range

Measuring

Resolution  Input

Overload protection

Pin designation

range      with

resistance

cont.  

max. 3 s

input

decimal pt.

3 1/2 digits

-   +   bridge

2 mA

1 µA

100 

Ω

50 mA

100 mA

1 - 3

---

20 mA

10 µA 

10 

Ω

160 mA

300 mA

1 - 3

---

200 mA

0.1 mA

1 

Ω

600 mA

1.5 A

1 - 5

---

2 A

1 mA

0.1 

Ω

3 A 

5 A

1 - 5

---

10 A

10 mA

0.01 

Ω

10 A

12 A

1 - 5

---

DC, triple/double measuring range
2 mA

1 µA

100 

Ω

50 mA

100 mA

1 - 6

7-10

20 mA

10 µA

10 

Ω

160 mA

300 mA

1 - 5

8-10

200 mA

0.1 mA

1 

Ω

600 mA

1.5 A

1 - 3

7-10,8-10

2 A

1 mA

0.1 

Ω

3 A

5 A

1 - 5

7-10

10 A

10 mA

0.01 

Ω

10 A

12 A

1 - 3

8-10

AC, individual measuring range

Measuring

Resolution Input

Overload protection  Pin designation 

bereich

with

resistance

cont.       max. 3 sec   input 

decimal pt. 

3 1/2 digits  

Lo   Hi 

bridge

2 mA

1 µA

100 

Ω

50 mA

100 mA

1 -  3

---

20 mA

10 µA

10 

Ω

160 mA

300 mA

1 -  3

---

200 mA

0.1 mA

1 

Ω

600 mA

1.5 A

1 -  5

---

2 A

1 mA

0.1 

Ω

3 A

5 A

1 -  5

---

10 A

10 mA

0.01 

Ω

10 A

12 A

1 -  5

---

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Digital Panel Instruments MDA480 / MDV480

06/07

3

- 13

3

Description       

Technical data

Measuring ranges 

These digital measuring instruments are designed to measure, display
and monitor either DC and AC currents (MDA480), or DC and AC
voltages (MDV480) in industrial applications.
The instruments are panel mounted with a front frame dimension of 
96 mm x 48 mm and a mounting depth of 166 mm and are available
with 3 1/2  or 4 1/2 digit 7-segment LED display covering various
measuring ranges.
Different supply voltages can be provided for a wide spread of
applications. Options include analogue, or relay output  with  2
setpoints. These features also add to the application possibilities
offered by these compact instruments.

MDA480

MDV480

Display:

Red 7-segment LED display
3 1/2
13 mm high

Full scale range:

1999 digits

Over-range indication: The last 3 digits will extinguish
With DC measuring ranges: display test by means of a front button
and Hold signal via terminal strip on the rear.

Accuracy of display (at 23 °C)

Current / Voltage, DC version: 

individual measuring range 
0.1 % dA ± 1 digit 
multiple measuring range 
0.15 % dA ± 1 digit

Current / Voltage, AC version: 

individual measuring range  
0.2 % dA ± 1 digit 

dA = of reading
The accuracy given refers to the indicated value.
DC input:

Potenzial free differential input
Common-mode range ± 1 V
Common-mode rejection > 60 dB

AC input:

Input related to instrument mass (Lo = 0 V)

Reading characteristics:

Integrating dual-slope

Count rate:

2.5 readings/second

Setting time for a 100 % reading change: < 3sec
Frequency range:
With AC version:

15 Hz...1 kHz

Temperature drift:

≤ 0.01 % span/K with 3 1/2 digit display

Warm-up to full accuracy:

15 min

Operating temperature 
range:

0...+50 °C

Storage temperature 
range:

-20...+70 °C

Application class:

KWF to DIN 40 040

Relative humidity:

0...75 % annual average, 95 % max.
(without condensation)

Shock test::

10 g (11ms), to IEC 68-2-29/DIN 40 046, 
part 26
3 x shocks in 3 planes

Vibration test:

on duty: 2 g (0.15 mm), 10...55 Hz 

on transport: 5 g (0.35 mm) 10...150 Hz, 
to IEC 68-2-6/DIN 40 046

(span = full measuring range)

Voltage supply (voltage rating):

AC 230 V (standard)     ±10 % 48...62 Hz

other voltages:

AC 240 V, 120 V, 115 V ±10 % 48...62 Hz

(optional)

AC 48 V, 24 V 

±10 % 48...62 Hz

DC 12 V...28 V (physically isolated)
Maximum allowed residual ripple 10 %, 
but not less than the minimum voltage or 
more than the maximum voltage.

Power consumption:   ≤ 9 VA/6.5 W

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www.e-t-a.com

Digital Panel Instruments MDA480 / MDV480

06/07

3

- 14

3  

Connector pin assignment

Case

Terminations

Caution:
If several instruments are to be fitted, a minimum of 8 mm between
each cut-out must be provided for correct removal of front glass.
(Fig. 4)
Case material:

glass-fibre reinforced
black Noryl SE 1

Degree of protection:

IP20 (front), with external setpoint setting
IP50 (front), with internal setpoint setting
(only with DC measurement)
IP20 (rear)

Applicable specification: VDE 0411 part 100
Pollution degree 3 to IEC 664 and 664 A

Instrument mass (without options): approx. 500 g

Plug-in screw-terminal strip for max. 1.5 mm

2

cables.

Fig. 4

Fig. 3

mounting bracket

terminal strips

166

Fig. 2

Rear view

Side view

96

Fig. 1

Front view

Panel cut-out

5.71

6.54

3.78

3.63

 

+ .012

1.71 

+.012

max .157

(.197)

12

11

1

2

3

4 5

6

7

9 10

8

92.3 

+ 0.3

43.3 

+ 0.3

max. 4

8

8

48

Option

145

(5)

1.89

.315

.315

signal inputs

bridges for:

rated

voltage

hold
decimal point

signal inputs

bridges for:

rated

voltage

Lo

N
+

L1
-

AC
DC

Hi1

1

2

3

4

7

8

-

5

6

+

11

12

9

+

+

Current measuring instrument

Voltage measuring instrument

Hi2 Hi3

10

hold
decimal point

Lo

N
+

L1
-

AC
DC

Hi1

1

2

3

4

7

8

-

5

6

+

11

12

9

-

+

Hi2

Lo2

10

This is a metric design and millimeter dimensions take precedence (

mm 

)

inch

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Options for MDA480 / MDV480 (with DC instruments only) 

06/07

3

- 15

3

Analogue output (AA and AB options)

2 Setpoints  (option G1)

Connector pin assignment

Setpoints

Description

Each of the DC current or voltage measuring instruments accepts a
current and a voltage analogue output. The voltage output is a
differential output which depends on the negative supply voltage;
the current output is ground-related. There is no physical isolation
between the analogue outputs and the measuring input.

Technical data

Current output:
Output current:  0...20 mA

corresponding to a 0...100 % measuring range

or

4...20 mA 

corresponding to a 0...100 % measuring range

Load resistance:  R

L

≤ 300

Ω

Voltage output:
Output voltage:

0...10 V 

corresponding to a 0...100 % measuring range

Load resistance: R

L

≥ 10 k

Ω

Overload protection: continuous short-circuit or no load

Caution!

Do not electrically connect the inputs and outputs simultaneously
when several instruments with analogue outputs are connected, as
this will cause ground loops short-circuiting the internal supply
across the analogue outputs. Otherwise provide additional interface
couplers with physical isolation at the outputs.

Terminations:

12-pole plug-in screw-terminal strip for max. 1.5 mm

2

cables

Description

The instruments may be fitted with setpoints. The setpoints are with
output relays to provide physical isolation. The response threshold
may be set with a potentiometer after  removing the front glass.
Fade-in reading of the set values with a selector switch accessible
from the front.

voltage

output

current

output

25

33

36 35 34

29

32 31 30

28 27 26

36 35

34

33

30

29

32

31

26

25

28 27

U+

U-

I+

I-

Rear view of analogue output option:

terminals for signal outputs, supply voltage

analogue output terminals

24 23

22 21

18

17

20 19

14

13

16

15

max

Contact position shown in the “acceptable range” condition with version
“relay de-energized”.

min

Connector pin assignment: 2 setpoints

Three LEDs indicate the switching position of the setpoints:

“min”
relay OFF

OFF

“max”
relay ON

alarm max

alarm min

ON

acceptable range

min

max

measured value

lighted: 

above max. limit (max)

(red LED)

lighted:

 “acceptable range”

(green LED)

lighted:

below min limit (min)

(red LED)

Switching performance  (here “relay de-energized” = self-protection)

0

12

34567

8

9

A

BC

DE

F

min

selector switch to
set the setpoints

“display test”

max

Switch position

or 8
1 or 9
3 or B
All other switch
positions

Readout

measuring value
min
max

overflow

Setting the setpoints (after removal of front glass)

Setting accuracy:

= accuracy of readout

Accuracy of response:

≤

 0.2 % span 

±

 1 digit

Hysteresis:

≤

 0.5 % span 

±

 1 digit

Response:

ca. 0.5 s

All relay switching conditions are inverted with “relay de-energized”.

Output:

Switching capacity:
max:

2-way contact 250 V/ 3 A/660 VA/100 W

min:

2-way contact 250 V/ 3 A/660 VA/100 W

Terminations:

12-pole plug-in screw-terminal strip for max. 1.5 mm

2

cables.

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

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Options for MDA480 / MDV480 (with DC instruments only) 

06/07

3

- 16

3  

2 Setpoints  + Analogue output

2 setpoints + analogue output 0...20 mA
2 setpoints + analogue output 4...20 mA
2 setpoints + analogue output 0...10 V
See page 15 for setpoint description

Analogue output: 
The voltage or current analogue output is designed as a differential
output which depends on the internal negative supply voltage; the
current output is ground-related.
There is no physical isolation between the analogue output and the
measuring input.

Current output:
Output current

0...20 mA 

corresponding to a 0...100 % measuring range

or

4...20 mA 

corresponding to a 0...100 % measuring range

Load resistance  R

L

≤ 300 

Ω

Voltage output:
Output voltage

0...10 V 

corresponding to a 0...100 % measuring range

Load resistance: R

L

≥ 10 k

Ω

Overload protection: continuous short-circuit or no-load

Caution!

Do not electrically connect the inputs and outputs simultaneously
when several instruments with analogue outputs are connected, as
this will cause ground loops short-circuiting the internal supply
across the analogue outputs. Otherwise provide additional interface
couplers with physical isolation at the outputs.

Terminations: 

12-pole plug-in screw-terminal strip for max. 1.5 mm

2

cables.

24 23

22 21

18

17

20 19

14

13

16

15

max

Contact position shown in the “acceptable range” condition with version “relay
de-energized”.

min

Rear view: 2 setpoints and analogue output

13

21

terminals for signal outputs, supply voltage

24 23 22

17

20 19 18

16 15 14

setpoint
terminals

analogue output
terminals

voltage

output

U+

U-

current

output

I+

I-

Connector pin assignment

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

www.e-t-a.com

Digital Panel Instruments MDA480 / MDV480

06/07

3

- 17

3

Selector chart

multiple measuring
ranges (only DC):
        0…199.9  mV
and  0…1999  mV

        0…19.99     V
and  0…199.9     V
special measuring
range

and

4…20 mA

Example:  MDA480-D 3 22 A9 G1 N
Current measuring instrument 96 x 48 mm /3.78 in. x 1.89 in., DC 3 1/2 digit, double measuring range 2 A + 10 A, AC 230 V supply, with E-T-A‚ trademark‚
2 setpoints, internal setting, IP50, relay de-energized

2

setpoints

Please select the required type by following the chart below.

Digital measuring instrument

current

96 mm x 48 mm

(3.78 in. x 1.89 in.)

DC

AC sinusoidal

3 1/2 digit

individual measuring
ranges:
   0…1.999  mA
   0…19.99  mA
   0…199.9  mA
   0…1.999     A
   0…10.00     A
special measuring
range

individual measuring
ranges:
   0…199.9  mV
   0…1.999     V
   0…19.99     V
   0…199.9     V
   0…600.0     V
special measuring
range

multiple measuring
ranges (only DC):
        0…1.999  mA
and  0…19.99  mA
and  0…199.9  mA
        0…1.999     A
and  0…10.00     A
special measuring
range

AC: 240 V, 230 V
       120 V, 115 V
        48 V, 24 V

DC:  12 V…28 V

special calibration / marking

OEM branding

analogue output

0…10 V

MDA480

MDV480

Digital measuring instrument

voltage

96 mm x 48 mm

(3.78 in. x 1.89 in.)

Function:
Housing:

Version:

Display:

Measuring
range:

Power supply:
(voltage rating)

Options:

DC

AC sinusoidal

analogue

output

0…10 V

analogue

output

0…20 mA

analogue

output

4…20 mA

and

0…20 mA

relay

de-energized

relay

energized

2

setpoints

relay

de-energized

relay

energized

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www.e-t-a.com

06/07

3

- 18

3  

Type No.

Physical dimensions
A

current

V

voltage

Case
480

96 mm x 48 mm

Version
D

DC

A

AC

Display
3

3 1/2 digit

Measuring range
11

2 mA/200 mV

12

20 mA/2 V

13

200 mA/20 V

14

2 A/200 V

15

10 A/600 V

21

2 mA + 20 mA + 200 mA/200 mV + 2000 mV         

22

2 A + 10 A                     /       20 V + 200 V               

00

special measuring range*) 

Power supply (rated voltage)
A1

240 V AC

A3

120 V AC

A6

48 V AC

A7

24 V AC

A8

115 V AC

A9

230 V AC  (standard)

D8

12...28 V DC

K

special marking (see below for standard markings)*)
special marking as required by customer*)
special calibration*)

F

OEM branding*)

Options (with DC instruments only)  
AA

analogue output: 0...20 mA + 0...10 V

AB

analogue output: 4...20 mA + 0...10 V

G1

2 setpoints, internal setting, IP50

G6

2 setpoints, internal setting, IP50 + analogue output 0...20 mA 

G7

2 setpoints, internal setting, IP50 + analogue output 0...10 V

G9

2 setpoints, internal setting, IP50 + analogue output 4...20 mA

N

relay de-energized, standard

I

relay energized

MD A

480  -  D

3

22 A9

.

.

G1 N

ordering example

*) Clearly add desired specifications.

}

multiple measuring range, with DC input signals only

Ordering information

Standard markings:

V, mV, kV, MV, A, mA, kA, kW, MW, °F, °C, %, % r.F., ms, Stück, Ohm, pH, µs,
l, N, kN, kg, t, lbf, Ncm, Nm, m, cm, mm, km, inch, bar, mbar, Pa, hPa, psi, 
kg/cm

2

, mmWs, mWs, N/m

2

, N/mm

2

, Hz, kHz, U/min, min

-1

, sec

-1

, rpm, l/h, 

l/min, kg/h, m

3

/h, m/min, m/sec, t/h

Please check that combining the options is possible (see Selector Chart on the previous page).

All dimensions without tolerances are for reference only. In the interest of improved design,
performance and cost effectiveness the right to make changes in these specifications without
notice is reserved. Product markings may not be exactly as the ordering codes. Errors and
omissions excepted.

Digital Panel Instruments MDA480 / MDV480

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

www.e-t-a.com

Adjustable Digital Process Instrument MDK480

06/07

3

- 25

3

Description

Technical data

Measuring range/Input signals

The adjustable Digital Process Instrument MDK480 is designed to
measure and display process variables in industrial applications.The
instrument is panel mounted with front frame dimensions of 96 mm x
48 mm and a mounting depth of 166 mm. It is available with a 3 1/2
digit 7-segment LED display.
Input signal and display range as well as decimal points may be easily
set by means of internal jumpers. Fine adjustment is possible by
means of the potentiometer accessible from the front.
Different supply voltages can be provided for a wide spread of
applications. The instrument is also available with optional analogue
output, or with 2  setpoints with output relays.
A Hold input is included as standard.

MDK480

Measuring Input 

Overload 

protection

Pin

range

resistance

cont.

5 sec.

-

+

Standard signals 0...5/10 V or 0/4...20 mA

5/10 V

20 M

Ω

500 V

-

1

-

2

10 V

20 M

Ω

500 V

-

1

-

2

20 mA

10

Ω

160 mA    300 mA

3

-

4

Full scale range:

200...3000 Digits (= Endwert-Anfangswert)

Initial value:

-1000...+1000

User selectable decimal point.

Specify measuring unit when ordering

Accuracy of display (at 23 °C)

0.1 % of reading ± 1 digit
Input::

potential free differential input
common mode range 

± 1 V

common mode rejection 

> 60 dB

Display

Red 7-segment LED display,
3 1/2 digit, 13 mm high

Full scale range:

± 1999 Digits

Overload indication: 

The last 3 digits will extinguish

Hold signal via terminal strip on the rear

Reading characteristics

Integrating dual slope

Count rate: 

2.5 readings/s

Setting time for a 100 % reading change: < 3 s

Environmental requirements

Temperature drift:

≤ 0.01 % span/K

Warm-up to full accuracy: 

≤ 15 minutes

Operating temperature range: 0...+50 °C 
Storage temperature range:

-20...+70 °C

Application class:

KWF to DIN 40 040

Relative humidity:

0...75 % annual average, 95 % max. 
(without condensation)

Shock test:

10 g (11 ms), to IEC 68-2-29/
DIN 40 046, part 26
3 shocks in 3 planes

Vibration test: 

on duty: 2 g (0.15 mm), 10...55 Hz
on transport: 5 g (0.35 mm), 10...150 Hz
to IEC 68-2-6/DIN 40 046, page 8

Voltage supply (voltage rating):

AC 230 V

±10 % 48...62 Hz

other voltages:

AC 240 V, 120 V, 115 V ±10 % 48...62 Hz

(optional)

AC 48 V, 24 V,

±10 % 48...62 Hz

DC 12 V...28 V* physically isolated
Max. allowed residual ripple 10 %, but not 
less than the minimum voltage or more than 
the maximum voltage.

Power consumption:

≤ 9 VA/6,5 W

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

www.e-t-a.com

Adjustable Digital Process Instrument MDK480

06/07

3

- 26

3  

Connector pin assignment

Case

Terminations

Plug-in screw-terminal strip for max. 1.5 mm

2

cables.

12

11

1 2 3 4 5 6 7 8 9

Option

terminal strips

Fig. 4

Fig. 3

mounting bracket

166

Fig. 2

Rear view

Side view

96

Fig. 1

Front view

Panel cut-out

5.71

6.54

3.78

3.63

 

+ .012

1.71 

+.012

max .157

(.197)

92.3 

+ 0.3

43.3 

+ 0.3

max. 4

8

8

48

145

(5)

1.89

.315

.315

max. R1

max .039

inputs

Hold bridge

rated

voltage

10 V

5 V

N

+

L1

-

AC
DC

20 mA

1

2

3

4

7

8

-

5

6

+

11

12

9

+

-

H OV

Connections for standard signals

1

2

3

4

7

8

+

-

5

6

9

0 … 10 V or 0 … 5 V

1

2

3

4

7

8

+

-

5

6

9

0 … 20 mA or 4 … 20 mA

Current

Voltage

Caution:
If several instruments are to be fitted, a minimum of 8 mm between
each cut-out must be provided for correct removal of front glass
(fig. 4).
Case material:

black Noryl SE 1, glass-fibre reinforced

Degree of protection:

IP 50 (front), IP 20 (rear)

Applicable specification: VDE 0411 part 100
Pollution degree 3 to IEC 664 and 664 A 
Mass:

approx. 500 g (without option) 

This is a metric design and millimeter dimensions take precedence (

mm 

)

inch

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Options for Adjustable Process Instrument MDK480

06/07

3

- 27

3

Analogue output (AA and AB options)

2 Setpoints (option G1)

Connector pin assignment

Setpoints

Description

The  instrument  accepts a current and a voltage analogue output.
The voltage output is a differential output which depends on the
negative supply voltage; the current output is ground-related. There
is no physical isolation between the analogue outputs and the
measuring input.

Technical data

Current output:
Output current: 

0...20 mA

corresponding to a 0...100 % measuring range

or

4...20 mA 

corresponding to a 0...100 % measuring range

Load resistance:  R

L

≤ 300

Ω

Voltage output:
Output voltage:

0...10 V corresponding 0...100 % measuring range

Load resistance: R

L

≥ 10 k

Ω

Overload protection: continuous short-circuit or no load

Caution!

Do not electrically connect the inputs and outputs simultaneously
when several instruments with analogue outputs are connected, as
this will cause ground loops short-circuiting the internal supply
across the analogue outputs. Otherwise provide additional interface
couplers with physical isolation at the outputs.

Terminations:

12 pole plug-in screw-terminal strip for max. 1.5 mm

2

cables

Description

The instrument may be fitted with setpoints. The setpoints are with
output relays to provide physical isolation. The response threshold
may be set with a potentiometer after  removing the front glass.
Fade-in reading of the set values with a selector switch accessible
from the front.

Outputs:

Switching capacity
max:

2-way contact 250 V/ 3 A/660 VA/100 W

min:

2-way contact 250 V/ 3 A/660 VA/100 W

Terminations:

12 pole plug-in screw-terminal strip for max. 1.5 mm

2

cables.

voltage

output

current

output

25

33

36 35 34

29

32 31 30

28 27 26

12

11

1 2 3 4 5 6 7 8 9

36 35

34

33

30

29

32

31

26

25

28 27

U+

U-

I+

I-

Rear view with analogue output option:

terminals for signal outputs, supply voltage

analogue output terminals

24 23

22 21

18

17

20 19

14

13

16

15

max

Contact position shown in the “acceptable range” condition with version
“relay de-energized”.

min

Connector pin assignment: 2 setpoints

Three LEDs indicate the switching position of the setpoints:

“min”
relay OFF

OFF

“max”
relay ON

alarm max

alarm min

ON

acceptable range

min

max

measured value

lighted: 

above max. limit (max)

(red LED)

lighted:

 “acceptable range”

(green LED)

lighted:

below min limit (min)

(red LED)

Switching performance  (here “relay de-energized” = self-protection)

0

12

34567

8

9

A

BC

DE

F

min

selector switch to
set the setpoints

“display test”

max

Switch position

or 8
1 or 9
3 or B
All other switch
positions

Readout

measuring value
min
max

overflow

Setting the setpoints (after removal of front glass)

Setting accuracy:

= accuracy of readout

Accuracy of response:

≤

 0.2 % span 

±

 1 digit

Hysteresis:

≤

 0.5 % span 

±

 1 digit

Response:

ca. 0.5 s

All relay switching conditions are inverted with “relay de-energized”.

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

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Options for Adjustable Process Instrument MDK480

06/07

3

- 28

3  

2 Setpoints  + Analogue output

2 setpoints + analogue output 0...20 mA
2 setpoints + analogue output 4...20 mA
2 setpoints + analogue output 0...10 V
See page 27 for setpoint description

Analogue output: 
The voltage or current analogue output is designed as a differential
output which depends on the internal negative supply voltage; the
current output is ground related.
There is no physical isolation between the analogue output and the
measuring input.

Current output:
Output current

0...20 mA 

corresponding to a 0...100 % measuring range

or

4...20 mA 

corresponding to a 0...100 % measuring range

Load resistance  R

L

≤ 300

Ω

Voltage output:
Output voltage

0...10 V 

corresponding to a 0...100 % measuring range

Load resistance: R

L

≥ 10 k

Ω

Overload protection: continuous short-circuit or no-load

Caution!

Do not electrically connect the inputs and outputs simultaneously
when several instruments with analogue outputs are connected, as
this will cause ground loops short-circuiting the internal supply
across the analogue outputs. Otherwise provide additional interface
couplers with physical isolation at the outputs.

Terminations:

12 pole plug-in screw-terminal strip for max. 1.5 mm

2

cables.

setpoint
terminals

analogue output
terminals

Contact position shown in the “acceptable range” condition with version “relay
de-energized”.

voltage

output

current

output

24 23 22

21

18 17

20

19

14 13

16 15

max

min

U+

U-

I+

I-

13

21

24 23 22

17

20 19 18

16 15 14

12

11

1 2 3 4 5 6 7 8 9

Rear view: 2 setpoints and analogue output

terminals for signal outputs, supply voltage

Connector pin assignment:

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Adjustable Digital Process Instrument MDK480

06/07

3

- 29

3

Selector chart

analogue

output

4…20 mA

analogue

output

0…20 mA

analogue

output

0…10 V

2

setpoints

relay

de-energized

relay

energized

relay

energized

relay

de-energized

2

setpoints

Digital measuring instrument

standard signal: 0…5/10 V, 0/4…20 mA

96 mm x 48 mm (3.78 in. x 1.89 in.)

3 1/2 digit

Function:
Housing:
Display:

0…20 mA

4…20 mA

0…10 V

analogue output

Example:  MDK480-X 3 0 X X A9 G9 N
Digital measuring instrument 96 x 48 mm / 3.78 in. x 1.89 in., 3 1/2 digit, for standard signals 0…5/10 V; 0/4…20 mA, user selectable initial value, full scale range
and decimal point, AC 230 V supply, E-T-A‚ trademark‚ 2 setpoints, internal setting, IP50, relay de-energized, analogue output 0…20 mA, marking m

3

/h

initial value:    -1000…1000

full scale range:   200…3000 digits

AC:  240 V, 230 V

120 V, 115 V

48 V, 24 V

DC:  12 V…28 V

Decimal point (adjustable):

Power supply:
(rated voltage)

Options:

1999

199.9
19.99
1.999

MDK480

1

)

1

)

Please select the required type by following the chart below.

factory preset / marking (unit)

OEM branding

1

) internal setting IP50

Measuring range (adjustable):

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Adjustable Digital Process Instrument MDK480

06/07

3

- 30

3  

Ordering information 

Standard markings:

V, mV, kV, MV, A, mA, kA, kW, MW, °F, °C, %, % r.F., ms, Stück, Ohm, pH, µs,
l, N, kN, kg, t, lbf, Ncm, Nm, m, cm, mm, km, inch, bar, mbar, Pa, hPa, psi, 
kg/cm

2

, mmWs, mWs, N/m

2

, N/mm

2

, Hz, kHz, U/min, min

-1

, sec

-1

, rpm, l/h, 

l/min, kg/h, m

3

/h, m/min, m/sec, t/h

Please check that combining the options is possible (see Selector Chart on the previous page).

Type No.

Physical dimension
K

standard signal

Case
480

96 mm x 48 mm

Input
X

standard signal 0...5 V, 0...10 V, 0...20 mA, 4...20 mA (to be set by user)

0

special measuring range *)

Display
3

3 1/2 digit

Initial value of display
0

user selectable between -1000 and 1000 digits

Full scale range
X

user selectable between 200 and 3000 digits

Decimal point
X

user selectable decimal point

Voltage supply (voltage rating)
A1

240 V AC

A3

120 V AC

A6

48 V AC

A7

24 V AC

A8

115 V AC

A9

230 V AC (standard)

D8

12...28 V DC

K

factory pre-set*)
standard marking (see below)*)
special marking as requested by customer*)

F

OEM branding *)

Options
AA

analogue output:  0...20 mA + 0...10 V

AB

analogue output:  4...20 mA + 0...10 V

G1

2 setpoints, internal setting, IP50 

G6

2 setpoints, internal setting, IP50 + analogue output 0...20 mA

G7

2 setpoints, internal setting, IP50 + analogue output 0...10 V

G9

2 setpoints, internal setting, IP50 + analogue output 4...20 mA

N

Relay de-energized, standard

I

Relay energized

MD K  480 - X   3

0    X   X  A9    .    .      G9    N

ordering example

*)   Clearly add desired specifications

All dimensions without tolerances are for reference only. In the interest of improved design,
performance and cost effectiveness the right to make changes in these specifications without
notice is reserved. Product markings may not be exactly as the ordering codes. Errors and
omissions excepted.

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Digital Pressure Measuring Instrument MDR480

06/07

3

- 19

3

Description

Technical data

Measuring ranges 

The digital panel instrument MDR480 is designed to measure, display,
and monitor pressures in industrial applications. The instrument is panel
mounted with a front frame dimension of 96 mm x 48 mm and a
mounting depth of 166 mm. It is available with a 3 1/2 digit  7-Segment
LED display covering various measuring ranges.
An auxiliary voltage output of 24 V/25 mA, physically isolated from the
measuring input, is provided to supply a pressure transmitter. The
resistance bridges (sensors) may be directly fed by applying a
constant voltage (U

ref)

of 10 V or a constant current (Iconst) of 1 mA.

The input range for standard signals and the display range (initial
value, full scale range and decimal point) may be selected by internal
jumpers and adjusted by means of the potentiometer accessible from
the front. Different supply voltages allow a wide spread of
applications. The instrument is also available with optional analogue
output, or with two setpoints with output relays.
A Hold input is included as standard.

MDR480

Measuring

Input

Overload protection

Pin designation

range

resistance

cont.   

5 sec

-

+

Standard signal from pressure transmitters 0...5/10 V or 0/4...20 mA

5/10 V

20 M

Ω

500 V       

-

1

-

2

20 mA

10 

Ω

160 mA    

300 mA

3

-

4

Pressure sensors (strain gauge sensors/solid-state sensors)

20 mV...200 mV*

880 k

Ω

150 V

-

1

-

2

*The measuring range is a function of the sensor sensitivity (in mV/V).

Please specify this value when ordering.

Standard display ranges for pressure (in bar):

0...250

0...1000

200...1000

0...400

0...1600

300...1500

0...600

0...1999

and decimal multiples (set decimal points as required)

Adjustable display:

Full scale range:

200...3000 digits (= final value - inital value)

Initial value:

-1000...+1000

Decimal point:

selectable

Please specify measuring unit when ordering.

Accuracy of display (at 23 °C)

0.1 % of reading ± 1 digit
Input:

potential-free differential input
common-mode range

± 1 V

common-mode rejection >60 dB

Display:

Red 7-segment LED display
3 1/2 digit
13 mm high

Full scale range:

± 1999 digits

Over-range indication:

The last 3 digits will extinguish

Hold signal via terminal strip on the rear
Reading characteristics:

Integrating dual-slope

Count rate: 

2.5 readings/s

Setting time for a 100 % reading change: < 3 s

Sensor supply voltage

Output physically isolated from the signal input and voltage supply.
Overload protection: 

short-circuit proof

Auxiliary voltage supply for the electronic transmitter (standard):
Voltage:

DC 24 V ± 10 %

Current:

25 mA

Residual ripple:

≤ 0.5 %

Terminals:

5(-) and 6(+)

Connection of resistance bridges (strain gauge sensors,
piezoresistive sensors, etc.):
Constant voltage:

U

ref

= 10 V

Bridge resistance:

≥ 330 

Ω

or
Constant current:

I

const

= 1 mA

Environmental requirements

Temperature drift:

≤ 0.01 % span/K 
(span = full measuring range)

Warm-up to full accuracy:

≤ 15 min.

Operating temperature range: 0...+50 °C 
Storage temperature range: -20...+70 °C 
Applications class:

KWF to DIN 40 040

Relative humidity:

0...75 % annual average, 95 % max. 
(without condensation)

Shock test:

10 g (11 ms), to IEC 68-2-29/DIN 40 046
part 26, 3 x shocks in 3 planes

Vibration test:

on duty:

2 g (0.15 mm), 10...55 Hz

on transport:  5 g (0.35 mm), 10...150 Hz  
to IEC 68-2-6/DIN 40 046, page 8

Voltage supply (voltage rating):

AC 230 V

±10 %  48...62 Hz

other voltages:

AC 240 V, 120 V, 115 V

±10 %  48...62 Hz

(optional)

AC 48 V, 24 V

±10 %  48...62 Hz

DC 12 V...28 V (physically isolated)

Max. allowed residual ripple 10 %, but not less than the minimum
voltage or more than the maximum voltage.
Power consumption:

≤ 8 VA/6.5 W

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

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Digital Pressure Measuring Instrument MDR480

06/07

3

- 20

3  

Connector pin assignment

Case

Terminations

Plug-in screw-terminal strip for max. 1.5 mm

2

cables.

12

11

1 2 3 4 5 6 7 8 9

Option

Fig. 4

Fig. 3

mounting bracket

terminal strips

166

Fig. 2

Rear view

Side view

96

Fig. 1

Front view

Panel cut-out

5.71

6.54

3.78

3.63

 

+ .012

1.71 

+.012

max .157

(.197)

92.3 

+ 0.3

43.3 

+ 0.3

max. 4

8

8

48

145

(5)

1.89

.315

.315

max. R1

max .039

supply

input signal

presure
transmitter

supply

input signal

supply

input signal

supply

input signal

presure
transmitter

+

-

+

-

inputs

1

Hold bridge

rated

voltage

2

3

4

7

8

+

-

5

6

+

-

10 V

 5 V

11 12

9

N

+

L1

-

AC
DC

H OV

20 mA

outputs

+

-

24 V
U

ref

I

const

K

1

2

3

4

7

+

-

5

6

4 … 20 mA

Connection of presure transmitters

2 conductor circuit, current: 4 … 20 mA

+

-

24 V

supply

input signal

presure
transmitter

1

2

3

4

7

+

-

5

6

0/1 … 5 V, 0/2 … 10 V

3 conductor circuit, voltage: 0/1 … 5 V or 0/2 … 10 V

+

-

24 V

1

2

3

4

7

+

-

5

6

0/4 … 20 mA

3 conductor circuit, current: 0 … 20 mA or 4 … 20 mA

+

-

24 V

1

2

3

4

7

+

-

5

6

0/1 … 5 V, 0/2 … 10 V

4 conductor circuit, voltage: 0/1 … 5 V or 0/2 … 10 V

+

-

24 V

1

2

3

4

7

5

6

0/4 … 20 mA

4 conductor circuit, current: 0 … 20 mA or 4 … 20 mA

24 V

1

2

3

4

7

+

-

5

6

U

signal

Connection of resistance bridges

+

-

U

const

/I

const

resistance
bridge

+

-

+

-

presure
transmitter

presure
transmitter

Caution:
If several instruments are to be fitted, a minimum of 8 mm between
each cut-out must be provided for correct removal of front glass
(fig. 4).
Case material:

glass-fibre reinforced black Noryl SE 1

Degree of protection:

IP 50 (front), IP 20 (rear)

Applicable specification:

VDE 0411 part 100

Pollution degree 3 to IEC 664 and 664 A 
Mass:

approx. 500 g (without option) 

This is a metric design and millimeter dimensions take precedence (

mm 

)

inch

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

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Options for Pressure Measuring Instrument MDR480

06/07

3

- 21

3

Analogue output (AA and AB options)

2 Setpoints  (option G1)

Connector pin assignment

Setpoints

Description

The pressure measuring instrument  accepts a current and a voltage
analogue output.The voltage output is a differential output which
depends on the negative supply voltage; the current output  is
ground-related. There is no physical isolation between the analogue
outputs and the measuring input.

Technical data

Current output:
Output current:  0...20 mA 

corresponding to a 0...100 % measuring range

or

4...20 mA 

corresponding to a 0...100 % measuring range

Load resistance: R

L

≤ 300 

Ω

Voltage output:
Output voltage: 0...10 V

corresponding to a 0...100 % measuring range

Load resistance: R

L

≥ 10 k

Ω

Overload protection: continuous short-circuit or no load

Caution!

Do not electrically connect the inputs and outputs simultaneously
when several instruments with analogue outputs are connected, as
this will cause ground loops short-circuiting the internal supply
across the analogue outputs. Otherwise provide additional interface
couplers with physical isolation at the outputs.

Terminations:

12-pole plug-in screw-terminal strip for max. 1.5 mm

2

cables

Description

The instrument may be fitted with setpoints. The setpoints are with
output relays to provide physical isolation. The response threshold
may be set with a potentiometer after  removing the front glass.
Fade-in reading of the set values with a selector switch accessible
from the front.

voltage

output

current

output

25

33

36 35 34

29

32 31 30

28 27 26

12

11

1 2 3 4 5 6 7 8 9

36 35

34

33

30

29

32

31

26

25

28 27

U+

U-

I+

I-

Rear view with analogue output option:

terminals for signal outputs, supply voltage

analogue output terminals

24 23

22 21

18

17

20 19

14

13

16

15

max

Contact position shown in the “acceptable range” condition with version
“relay de-energized”.

min

Connector pin assignment: 2 setpoints

Three LEDs indicate the switching position of the setpoints:

“min”
relay OFF

OFF

“max”
relay ON

alarm max

alarm min

ON

acceptable range

min

max

measured value

lighted: 

above max. limit (max)

(red LED)

lighted:

 “acceptable range”

(green LED)

lighted:

below min limit (min)

(red LED)

Switching performance  (here “relay de-energized” = self-protection)

0

12

34567

8

9

A

BC

DE

F

min

selector switch to
set the setpoints

“display test”

max

Switch position

or 8
1 or 9
3 or B
All other switch
positions

Readout

measuring value
min
max

overflow

Setting the setpoints (after removal of front glass)

Setting accuracy:

= accuracy of readout

Accuracy of response:

≤

 0.2 % span 

±

 1 digit

Hysteresis:

≤

 0.5 % span 

±

 1 digit

Response:

ca. 0.5 s

All relay switching conditions are inverted with “relay de-energized”.

Outputs:

Switching capacity
max:

2-way contact 250 V/ 3 A/660 VA/100 W

min:

2-way contact 250 V/ 3 A/660 VA/100 W

Terminations:

12-pole plug-in screw-terminal strip for max. 1.5 mm

2

cables.

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Options for  Pressure Measuring Instrument MDR480

06/07

3

- 22

3  

2 Setpoints  + Analogue output

2 setpoints + analogue output 0...20 mA
2 setpoints + analogue output 4...20 mA
2 setpoints + analogue output 0...10 V
See page 21 for setpoint description

Analogue output: 
The voltage or current analogue output is designed as a differential
output which depends on the internal negative supply voltage; the
current output is ground related.
There is no physical isolation between the analogue output and the
measuring input.

Current output:
Output current 

0...20 mA 

corresponding to a 0...100 % measuring range

or

4...20 mA 

corresponding to a 0...100 % measuring range

Load resistance   R

L

≤ 300 

Ω

Voltage output:
Output voltage

0...10 V 

corresponding to a 0...100 % measuring range

Load resistance: RL ≥ 10 k

Ω

Overload protection: continuous short-circuit or no-load

Caution!

Do not electrically connect the inputs and outputs simultaneously
when several instruments with analogue outputs are connected, as
this will cause ground loops short-circuiting the internal supply
across the analogue outputs. Otherwise provide additional interface
couplers with physical isolation at the outputs.

Terminations: 

12-pole plug-in screw-terminal strip for max. 1.5 mm

2

cables.

setpoint
terminals

analogue output
terminals

Contact position shown in the “acceptable range” condition with version “relay
de-energized”.

voltage

output

current

output

24 23 22

21

18 17

20

19

14 13

16 15

max

min

U+

U-

I+

I-

13

21

24 23 22

17

20 19 18

16 15 14

12

11

1 2 3 4 5 6 7 8 9

Rear view: 2 setpoints and analogue output

terminals for signal outputs, supply voltage

Connector pin assignment:

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

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Digital Pressure Measuring Instrument MDR480

06/07

3

- 23

3

Selector chart

relay

de-energized

relay

energized

Power supply:
(rated voltage)

Input:

Function:
Housing:
Display:

Please select the required type by following the chart below.

Example:  MDR480-B 3 2 Z 1 A9 G7 N:
Pressure measuring instrument 96 x 48 mm / 3.78 in. x 1.89 in., 3 1/2 digit, for standard signal 0…20 mA, measuring range 0.00…4.00 bar, AC 230 V supply,
with E-T-A‚ trademark‚ 2 setpoints, internal setting, IP50, relay de-energized, analogue output 0…10 V

0…20 mA

4…20 mA

0…10 V

analogue output

analogue

output

0…10 V

analogue

output

0…20 mA

analogue

output

4…20 mA

relay

de-energized

relay

energized

2

setpoints

2

setpoints

standard input
0…5 V, 0…10 V,
1…5 V, 2…10 V,
0…20 mA, 4…20 mA

AC: 240 V, 230 V
      120 V, 115 V
      48 V, 24 V

DC:  12 V…28 V

special calibration / marking

OEM branding

Options:

0…250
0…400
0…600
0…1000
0…1600

strain-gauge sensor
solid state sensor

    0…1999
200…1000
300…1500
special range

1999
199.9
19.99
1.999

bar
mbar
kPa
psi

N/m

2

N/mm

2

without unit
special marking

Decimal point:

Marking (unit):

Digital measuring instrument

pressure

96 mm x 48 mm (3.78 in. x 1.89 in.)

3 1/2 digits

MDR480

1

)

1

)

1

) internal setting IP50

Measuring range:

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Digital Pressure Measuring Instrument MDR480

06/07

3

- 24

3  

Ordering Information 

Standard markings:

V, mV, kV, MV, A, mA, kA, kW, MW, °F, °C, %, % r.F., ms, Stück, Ohm, pH, µs,
l, N, kN, kg, t, lbf, Ncm, Nm, m, cm, mm, km, inch, bar, mbar, Pa, hPa, psi, 
kg/cm

2

, mmWs, mWs, N/m

2

, N/mm

2

, Hz, kHz, U/min, min

-1

, sec

-1

, rpm, l/h, 

l/min, kg/h, m3/h, m/min, m/sec, t/h

Type No.

Physical dimension
R

Pressure

Case
480

96 mm x 48 mm

Input
A

standard signal 0...10 V

B

standard signal 0...20 mA

C

standard signal 4...20 mA

D

resistance bridge,fed with constant voltage**) (U

ref

= 10 V)

E

standard signal  0...5 V

F

standard signal  1...5 V

G

standard signal  2...10 V

H

resistance bridge, fed with constant current**) (I

const

= 1 mA)

X

user selectable standard signal   
0...5 V, 0...10 V, 0...20 mA, 4...20 mA

Display
3

3 1/2 digit

Measuring range
1

0...250

2

0...400

3

0...600

4

0...1000

5

0...1600

6

0...1999

7

200...1000

8

300...1500

0

special measuring range*)

X

user selectable display: initial value between -1000 and +1000 digits,    
full scale range between 200 and 3000 digits

Decimal point
T

1999

H

199,9

Z

19,99

E

1,999

X

user selectable decimal point

Marking (unit)
1

bar

2

mbar

3

kPa

4

psi

5

N/m

2

6

N/mm

2

9

without unit

0

special marking (see below for standard markings)*)
special marking as requested by customer*)

Power supply (rated voltage)
A1

AC  240 V

A3

AC  120 V

A6

AC  48 V

A7

AC  24 V

A8

AC  115 V

A9

AC  230 V (standard)

D8

DC  12...28 V physically isolated

K

special measuring range*)

F

OEM branding*)

Options
AA

analogue output:  0...20 mA + 0...10 V

AB

analogue output:  4...20 mA + 0...10 V

G1

2 setpoints, internal setting, IP50

G6

2 setpoints, internal setting, IP50 + analogue output 0...20 mA

G7

2 setpoints, internal setting, IP50 + analogue output 0...10 V

G9

2 setpoints, internal setting, IP50 + analogue output 4...20 mA

N

Relay de-energized,  standard

I

Relay energized

MD R 480 - B

3 2 Z

1

A9

.

.

G7

N

ordering example

*) Clearly add desired specifications.

**) Please indicate the signal voltage range and the bridge resistance when 

ordering. 

All dimensions without tolerances are for reference only. In the interest of improved design,
performance and cost effectiveness the right to make changes in these specifications without
notice is reserved. Product markings may not be exactly as the ordering codes. Errors and
omissions excepted.

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

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Panel Instrument MDZ480 with programmable controller    

06/07

3

- 31

3

AC input signals

Input resistance

Overload protection

U

rms

continuous

15 V...50 V

13 k

Ω

120 V

50 V...150 V

43 k

Ω

350 V

150 V...430 V

120 k

Ω

600 V

Signal inputs

Digital Impulse

Input

Trigger 

level

R

on

(k

Ω

)/  

Overload/Reverse

signals

duration

voltage      typically 

C

on

(pF)  

polarity protection

min.

(V)

(V)

TTL

4 µs

5

2.4

100/10

SPS

4 µs

24

6

8.2/10

OC-PNP

4 µs

max. 40

6

8.2/10

DC 50 V

OC-NPN  4 µs

max. 40

6

8.2/10

dauernd

Universal  4 µs

max. 40

6

100/10

Namur

4 µs

1.2...2.1 mA

Description       

Technical data       

The MDZ480 Panel Instrument with programmable controller is 
designed for industrial applications and has a front frame dimension
of 96 mm x 48 mm.
Selection of the following operating modes is  menu driven by means
of the keys on the front:

FREQUENCY MEASUREMENT
VELOCITY MEASUREMENT
TIME MEASUREMENT
IMPULSE MEASUREMENT
SPECIAL FUNCTION

In the “special function” operating mode an optional readout value may 
be assigned to an input frequency.
The measuring input of the instrument is physically isolated and is
designed to process digital signals between 5 and 40 V with max. 100 kHz
(TTL/OC-PNP, -NPN/Namur/PLC/Universal) or AC voltages between
15 and 430 Vrms with max. 10 kHz. A physically isolated supply
voltage of 24 V/40 mA is provided for signal sensors.
To increase the precision of the instrument, the measuring method - 
either time measurement or impulse counting - is automatically
switched 
over when in the frequency or velocity measuring mode.
An optional feature available is setpoint monitoring with peak value 
storage.
Programming of the instrument is also menu driven via the front keys.

MDZ480

Measuring ranges

Operating mode

Digital signals

AC-Eingangssignale

Frequency measurement

0.1 Hz...100 kHz

0.1 Hz...10 kHz

Velocity measurement

6...99999 min

-1

6...9999 min

-1

Time measurement

1 ms...9999 ms

1 ms...9999 ms

Impulse counting

max. 1 kHz

max. 1 kHz

Special function

0.1 Hz...100 kHz

0.1 Hz...10 kHz

Housing    

12 11

1

2

3

4

5

6

7

8

10 9

Fig. 4

Fig. 3

mounting bracket

screw terminal block

166

Fig. 2

Rear view

Side view

96

Fig. 1

Front view

Panel cut-out

5.71

6.54

3.78

3.63

 

+ .012

1.71 

+.012

max .157

(.197)

92.3 

+ 0.3

43.3 

+ 0.3

max. 4

8

8

48

145

(5)

1.89

.315

.315

max. R1

max .039

Housing material:

black Noryl SE 1, glass fibre reinforced

Protection degree of housing: IP50 (front), IP20 (rear)

Applicable basic standard: 

VDE 0411, part 100

Pollution degree 3 to IEC 664 and 664 A

Mass: 

approx. 300 g

Signal sensor supply:

DC 24 V ± 10 %, I

max 

= 40 mA, 

(terminals 4/5/6)

short-circuit proof, physically 
isolated

Control input  (terminals 7/8)

- input resistance:

R = 2.5 k

Ω

- voltage range:

DC 5 V...35 V

Signal relay (terminals 9/10) 

Max. contact load:

24 V/0.8 A

Max. reading error:

0.1 %

Operating temperature range: 0...50 °C

Storage temperature:

-20...70 °C

Admissible humidity:

≤ 75 % annual average, 95 % max.
non-condensing

Power supply:

AC 230 V ± 10 %  48...62 Hz
AC 115 V ± 10 %  48...62 Hz

Power consumption:

≤ 9.5 VA

Version (Display)  

Version 

V

:

selectable operating modes, programmable,
full-scale range of max. 5 digits.

Version

F

:

frequency measurement, factory pre-set, 
full-scale range of max. 4 digits.

Automatic decimal point setting so that the readout ranges are as
follows:

Version

Version

Version

MDZ480-

V

5...

MDZ480-

F

4...

MDZ480-

F

3...

0.100...9.999

0.100...9.999

0.100...9.99

10.00...99.99

10.00...99.99

10.0...99.9

100.0...999.9

100.0...999.9

100...999

1000...9999

1000...9999

1000...9999

10000...99999

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Panel Instrument MDZ480 with programmable controller

06/07

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Connector pin assignment

Connection diagrams for signal sensors

Operation

PLC
24 V

1

2

3

4

5

6

MDZ480-V5.1

1

2

3

4

5

6

Universal

40 V

MDZ480-V5.1

TTL

5 V

1

2

3

4

5

6

MDZ480-V5.1

1

2

3

4

5

6

MDZ480-V5.1

Namur

1

2

3

4

5

6

MDZ480-V5.1

OC-NPN

1

2

3

4

5

6

MDZ480-V5.1

OC-PNP

control

input

signal

output

24 V/0.8 A

1

2

3

4

7

8

-

5

6

11

12

9

10

2k5

+

sensor
supply

Imax 40 mA

sensor

adjustment

0 V

+24 V

-

+

signal    GND

 sensor

control

input

signal

output

24 V/0.8 A

230 V~

(115 V~)

1

2

3

4

7

8

-

5

6

11

12

9

10

2k5

+

signal

adjustment

-

+

230 V~

(115 V~)

AC

signal

signal

adjustment

AC

signal

1

2

3

4

7

8

-

5

6

11

12

9

10

+

230 V~

(115 V~)

Operating modes

Measuring procedures for frequency and velocity

Frequency measuring instrument

The measuring time can be selected between 0.5 and 9 s.

Velocity measuring instrument

The number of impulses (“teeth”) per rotation - values between 1 and 999
- can be entered by the user.

Time measuring instrument

This operating mode measures the time between 2 impulses (rising curve).
The user may select a measuring time between 0.5 and 9 s.

Forward counter

Counting from 0 by the front key or control input. The counter will 
overflow when reaching 100,000, with the signal relay being actuated for
approx. 100 ms and the next decimal points being set so that a max. 
counting value of 9.9.9.9.9, i.e. 499 999, may be read.

Backward counter

Preload values are entered by the keyboard. Starting is by key or
control input.
The signal relay will switch and the counter will stop when reaching 0.

Special function

In the “Special Function” operating mode an optional readout value may
be assigned to an input frequency.
Readout value = Input frequency x multiplication factor + offset.
The multiplication factor may be selected between 0.001 and 9999, the 
offset between -9999 and +9999. A negative result obtained from the
above formula will result in a “-----” readout. Negative values are not 
indicated.

Two procedures are available to increase the accuracy of measurement:
impulse counting when the input frequency fon is > 1000 Hz, and cycle
period measurement when it is < 1000 Hz.

Cycle period measurement:

The time between two subsequent incoming impulses (cycle period) is
measured by means of an internally generated reference frequency of 
1 MHz. The number of periods which is used to set up the measuring
value is a function of the measuring time selected:
Measuring time 0:

readout update after each 0.5 s, with the last
measuring period being shown.

Measuring time 1...9: readout update after each 1...9 s. 
Mean value calculated from the number of cycle periods measured
during the measuring period.

Impulse counting:

The number of periods which is used to set up the measuring value is a
function of the measuring time selected.
Measuring time 0:

readout update after each 0.5 s.

Measuring time 1...9: readout update after each 1...9 s.
Error diagram (see next page):
The max. possible measuring error referred to the input frequency can be
determined from the error diagram. The possible error maximum of 
0.1 % will show up when switching from cycle period measurement to
impulse counting at an input frequency of 1 kHz.

Terminal selection as for version V: selectable operating mode 
with digital input

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Error diagram

Option: Peak values

Adjustment

Option: Limit Values

LED Display

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Panel Instrument MDZ480 with programmable controller

06/07

3

- 33

3

10

10

-1

5

10

-2

2

2

5

10

-3

1

10

10

3

2

2

2

5

5

5

5

2

10

4

10

5

f(Hz)

cycle period

measurement

impulse counting

(measuring time = 1 s)

Error (%)

Change over from cycle period
measurement to impulse counting

2

The maximum and the minimum readings measured are stored and
may be indicated. If the limit value is exceeded during a peak value
reading, it is indicated by LEDs.The two peak values may be
simultaneously deleted via the control input. To do this, instrument
MDZ480 must be either in the measuring mode or peak value
indication. Deletions cannot be made during the adjustment.

The peak values stored are deleted in the event of power failure or 
disconnection of instrument MDZ480.

An upper and a lower limit value may be set between 0.001 and 99998.
The signal relay (either N/C or N/O to order) will operate when these 
values are exceeded or when they are below the set limit.
The relay operating mode may be selected.
Closed circuit mode:
The relay carries no-load when one of the limit values is exceeded or 
not reached; it is switched off.
Open circuit mode:
The relay carries current when one of the limit values is exceeded or 
not reached; it is switched on.
Enter “00000” if no lower limit value is desired.
Enter “99999” if no upper limit value is desired.
The controller will automatically adjust the entry format to the display 
format, i.e. entry “00010” will be “010,00”, and “00345” will be ”0345.0”.
The set limit values and the selected relay mode are even stored after 
disconnection of the power supply.

When starting the measuring operation, the relay is switched to 
“acceptable range” until the first value measured is available 
(depending on the set measuring time).

Instrument MDZ480-F... (frequency measurement with AC voltage
input) is preset in the factory and ready for immediate operation.

Instrument MDZ480-V... (selectable operating modes) may be
adjusted by means of keys T1 to T6 (see next page).
If the keys are sited behind the front glass, remove it as described as 
follows:

1.  Remove the bezel by pushing the upper or lower bezel edges 

outwards.

2.  Use a screwdriver to ease the front glass out of the lower recess.

When adjusting or entering parameters, the display flashes at the 
positions which may be changed by pressing the relevant keys.
Decimal points may be set by pressing the applicable key beyond “9”.
Repeat this procedure to delete the decimal point. To change the
position of a decimal point, first delete the existing decimal point.

Operating mode, parameters and measuring input are stored even if
the supply voltage is switched off.

Upon power connection all display elements will be activated for 
approx. 1 s.
Left-hand zeros are suppressed during the measuring mode.
Readout when the measuring range has not been reached: “-----”
Readout when the measuring range has been exceeded: “E E E E E”

flashing

flashing

lighted

lighted

lighted

lighted

lighted

llighted

flashing

flashing

lighted

lighted

lighted

lighted

lighted

lighted

LED A (red)

LED B (green)

LED C (red)

Signalization

Upper limit value exceeded
Acceptable range
Below lower limit

Display indicates: lower peak value (flashing)

Measuring mode

Measuring or display range exceeded
Counting
Below measuring or display range

Limit value monitoring

Upper limit value exceeded
Acceptable range
Below lower limit

Display indicates: upper peak value (flashing)

Upper limit value exceeded
Acceptable range
Below lower limit

Function

Status

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Panel Instrument MDZ480 with programmable controller    

06/07

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Programming

1. Select measuring input

Key 2

PLC- input

TTL - level

OC - PNP

OC - NPN

Namur input

Universal input

Transfer/Enter

Lower peak value

Upper peak value

Measuring value

T6

T6

delete    T6

delete    T6

inidcate

Lower limit

Upper limit

Alternative: The two peak values may be simultaneously deleted via the

control input. To do this, the instrument must be either in
the measuring mode or peak value indication.

Frequency measurement

Velocity measurement

Forward counter

Backward counter

Time measurement

Universal input

T6

T6

T6

T6

T6

T6

2. Select operating mode

Limit values

Key 4

Peak values

Key 5

Relay operation

Key 4

T6          value    T1   T2   T3   T4   T5        T6                closed circuit

T6          value    T1   T2   T3   T4   T5         T6

 open circuit

Key 1

T6         measuring time T5         T6

T6         measuring time T5         T6         number of teeth     T3   T4   T5         T6

start    T6    or control input

T6         preload value

T1   T2   T3   T4   T5          start   T6   or control input

T6        measuring time T5         T6

T6         measuring time T5         T6         multiplication factor  T2   T3    T4   T5          T6         offset T1   T2   T3   T4   T5         T6

A

LED

B

C

T1

T2

T3

T4

T5

T6

Keys

Position of the operator and display elements

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Selector chart

Ordering information

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Panel Instrument MDZ480 with programmable controller    

06/07

3

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3

Power supply:
(rated voltage)

Example:  MDZ480-V 5 H 1 1  A9 G0
Panel instrument with programmable operating modes (keyboard behind front glas)
96 x 48 mm / 3.78 in. x 1.89 in., 5 digit, digital input, Hz marking, AC 230 V voltage rating,
limit and peak values, NO relay contact

variable:

frequency, velocity, cycle

period, forward and backward

counting, special function

panel instrument with

programmable controller

96 mm x 48 mm / 3.78 in. x 1.89 in.

digital (selectable):
TTL, PLC, PNP, NPN, Namur
AC: 15 V…50 V
AC: 50 V…150 V
AC: 150 V…430 V

5 digit

MDZ480

Housing::

Function:

Display:

Marking:

NO

NC

internally

(behind front glas)

frequency measurement

with AC input

4 digit with max.
2 fractional digits

externally

(touch pad)

Keyboard:

Input signal:

Options:
(only with variable version)

Relay contacts:

AC: 15 V…50 V
AC: 50 V…150 V
AC: 150 V…430 V

Hz, U/min, min-1, sec-1,

rpm, pieces, ms,

no unit indication

special marking

AC: 230 V, 115 V

OEM branding

limit values

peak values

Please select the required type by following the chart below.

4 digit with max.
3 fractional digits

Accessory:

Velocity Sensor MSZ 214/218, see product group 4

*) Standard markings: 

V, mV, kV, MV, A, mA, kA, kW, MW, °F, °C, %, % r.F., ms, Stück, Ohm, pH, µs,

l, N, kN, kg, t, lbf, Ncm, Nm, m, cm, mm, km, inch, bar, mbar, Pa,hPa, psi,

kg/cm2, mmWs, mWs, N/m2, N/mm2, Hz, KHz, U/min, min-1, sec-1, rpm, l/h,

l/min, kg/h, m3/h, m/min, m/sec, t/h

**) Clearly add desired marking.

Type No.
MDZ

Type No.

Housing
480

96 mm x 48 mm

Function
V

variable

F

frequency measurement

Display
3

4 digit with max. 2 fractional digits Readout: 0.00...9.99

10.0...99.9 / 100...9999 Hz

4

4 digit with max. 3 fractional digits Readout: 0.000...9.999

10.00...99.99 / 100.0...999.9 

1000...9999 Hz

5

5 digit (only with ...-V version)

Keyboard
H

internal

E

external (only with ...-V version)

Input signal (measuring range)
1

digital (only with ...-V version)

2

AC 15 V...50 V

3

AC 50 V...150 V

4

AC 150 V...430 V

Marking
1

Hz

2

U/min

3

min

-1

4

sec

-1

5

rpm

6

pieces

7

ms

9

no unit indication

0

special marking 

(see below for standard markings) *)

special marking as required by customer **)

Power supply (voltage rating)
A9

AC 230 V (standard)

A8

AC 115 V

F

OEM branding

Options (only with ...-V version)

G0 limit values/peak values/

NO relay contact

G1 limit values/peak values/

NC relay contact

MDZ 480 -  V 5

H 1

1 A9

. G0

ordering example

All dimensions without tolerances are for reference only. In the interest of improved design,
performance and cost effectiveness the right to make changes in these specifications without
notice is reserved. Product markings may not be exactly as the ordering codes. Errors and
omissions excepted.

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

www.e-t-a.com

06/07

3

- 36

3  

Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com