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Shunt / mV Isolation Amplifier DES 78
Isolation and Conversion of mV-Shunt Signals
The Isolation Amplifier DES 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.
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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 DES 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.
Input
| Input signal 1) |
0 to 60 mV, 0 to 100 mV, 0 to 150 mV, 0 to 300 mV ±60 mV, ±100 mV, ±150 mV, ±300 mV see Product line |
| Input resistance | > 100 kOhm |
| Overload | ≤ 30 V |
Output
| Output signal 1) |
0 to 10 V, 0 to 5 V, 0 to 20 mA 2 to 10 V, 1 to 5 V, 4 to 20 mA see Product line |
|
| Load |
Voltage output Current output |
≥ 2 kOhm ≤ 500 Ohm |
| Ripple | < 10 mVrms | |
General Data
| Transmission error | < 0,2 % full scale | |
| Temperature coefficient 2) | < 0,02 %/K | |
| Response time | < 5 ms | |
| Test voltage |
2.5 kV, 50 Hz input against output against power supply |
|
|
Working voltage 3) (Basic Insulation) |
Up to 600 V AC/DC for overvoltage category II and pollution degree 2 acc. to EN 61010-1 between all circuits. | |
| 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 ... 62 Hz, approx. 2 VA DC: approx. 0.7 W |
| EMC 4) | EN 61326 -1 | |
| Construction | 11.2 mm housing, protection class: IP 20 | |
| Weight | Approx. 50 g | |
- Other signals on request.
- Average TC in specified operating temperature range.
- As far as relevant the standards and rules mentioned above are considered by development and production of our devices. In addition relevant assembly rules are to be considered by installation of our devices in other equipments. For applications with high working voltages, take measures to prevent accidental contact and make sure that there is sufficient distance or insulation between adjacent situated devices.
- Minor deviations possible during interference.
Terminal assignments
Wire cross-section max. 2.5 mm²
| 1 | Input + | 5 | Output + |
| 2 | Input - | 6 | Output - |
| 7 | Power supply + | ||
| 8 | Power supply - |
Product line
| Devices | Order No. | ||||
| Shunt / mV Isolation Amplifier | DES 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 | ||||
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Example: Shunt / mV Isolation Amplifier, Input ± 60 mV, Output 4 to 20 mA |
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