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Shunt / mV Isolation Amplifier DS 78

Isolation and Conversion of mV-Shunt Signals

The Isolation Amplifier DS 78 is used for isolation and conversion of bipolar and unipolar mV-Signals such as those frequently used for current measuring with shuntresistors or other applications with low sensor voltages.

  • Cost optimized design
    Economical separation for standard applications
  • Only 60 mm installation depth, 11.2 mm wide
    Can be installed in economical standard terminal boxes
  • Fixed ranges, easy to use
    Ready to use without any settings or adjustments
  • Zero/Span compensation on front panel
    for readjustment of sensor signal or measuring equipment
  • True 3-port separation
    Protection against erroneous measurements due to parasitic voltages or ground loops
  • Protective Separation acc. to EN 61140
    Protects service personnel and downstream devices against impermissibly high voltage
  • Unlimited use with 24 V AC/DC power supply
    Universally applicable for all measurement and industrial applications
  • 5 Years Warranty
    Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant (carriage and insurance paid by sender).

The Isolation Amplifier DS 78 is used for isolation and conversion of bipolar and unipolar mV-Signals such as those frequently used for current measuring with shuntresistors or other applications with low sensor voltages.

For applications where one signal combination only is used, the Isolation Amplifier DS 78 offers a cost-effective alternative.

A cross-connector for the auxiliary power supply ensures fast and easy installation. The slim housing with 11.2 mm width saves significant space on the DIN-rail. If required a measuring range compensation can be performed at the Zero/Scan potentiometers behind the front cover.

Analog signal processing guarantees precise measured values with short response times and outstanding signal reproduction at the output. Protective Separation and the 24 V AC/DC power supply make the DS 78 universally applicable for all measurement and industrial applications, as well as for building automation.

Technical Data

Input

Input signal 0 to 60 mV, 0 to 100 mV, 0 to 150 mV, 0 to 300 mV       see product line
±60 mV, ±100 mV, ±150 mV, ±300 mV
Input resistance > 100 kOhm
Overload ≤ 30 V

Output

Output signal 0 to 10 V, 0 to 5 V, 0 to 20 mA          see product line
2 to 10 V, 1 to 5 V, 4 to 20 mA
Load Voltage output
Current output
≥ 2 kOhm
≤ 500 Ohm
Residual ripple < 10 mVrms

General Data

Transmission error < 0,2 % full scale
Temperature coefficient 1) < 0,02 %/K
Cut-off frequency -3 dB 500 Hz
Response time 2 ms
Test voltage 3 kV AC, 50 Hz, 1 min., input against output against power supply
Working voltage 2)
(Basic Insulation)
600 V AC/DC for overvoltage category II and pollution degree 2 acc. to EN 61010-1
Protection against electrical shock 3) Protective separation according to EN 61140 by reinforced insulation in accordance with EN 61010-1 up to 300V AC/DC for overvoltage category II and pollution degree 2 between all circuits.
Ambient temperature Operation
Transport and storage
–20 °C to +60 °C    (–4 °F to +140 °F)
–35 °C to +85 °C    (–31 °F to +185 °F)
Power supply 24 V AC/DC, ± 15 % AC: 48 to 62 Hz, approx. 2 VA
DC: approx. 0.7 W
EMC 3) EN 61326 -1
Construction 11.2 mm (0.44") housing, protection class: IP 20
mounting on 35 mm DIN rail acc. to EN 60715
Weight Approx. 50 g
  1. Average TC related to full scale value in specified operating temperature range, reference temperature 23 °C
  2. For applications with high working voltages, ensure there is sufficient spacing or isolation from neighboring devices and protection against electric shocks.
  3. Minor deviations possible during interference.

Block diagram

Ds78

Dimensions

GehaeuseTinyZeroSpanLed

Terminal assignments
Wire cross-section max. 2.5 mm²

1 Input + 5 Output +
2 Input - 6 Output -
    7 Power supply +
    8 Power supply -

Downloads

Product line

Devices Order No.
Shunt / mV Isolation Amplifier DS 78 P - X X
  Input 0 to 60 mV   0  
± 60 mV   1  
0 to 100 mV   2  
± 100 mV   3  
0 to 150 mV   4  
± 150 mV   5  
0 to 300 mV   6  
± 300 mV   7  
Output 0 to 10 V     6
2 to 10 V     7
0 to 5 V     5
1 to 5 V     8
0 to 20 mA     2
4 to 20 mA     4
cross connector (2 pcs.)
for looping through the power supply for up to 10 Tiny Snap, splittable
DZU 0801
Subject to change!
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