Isolation And Conversion Of mV- Shunt Signals
With its introduction into the TinySnap Series of the Isolation Amplifier DS 78, DRAGO has further expanded its product offerings in the area of compact and economical interface technology components.
- 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 - True 3-port separation
Protection against erroneous measurements due to parasitic voltages or ground loops - High reliability and long-term stability
New APT technology for signal processing - Protective Separation acc. to EN 61140
Protects service personnel and downstream devices against impermissibly high voltage - Cross-connector for the auxiliary power supply
fast and economical installation - Unlimited use with 24 V AC/DC power supply
Universally applicable for all measurement and industrial applications - 5 Years Warranty
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. Its high level of reliability, extremely compact form, and cost optimized design make the DS 78 the first choice in its class!
Numerous sensible details: For example, because of its extremely small installation depth of a mere 60 mm, the DS 78 can also be installed in economical standard terminal boxes such as those frequently used for decentralized measuring points. A cross-connector for the auxiliary power supply ensures fast and economical installation.
Analog signal processing utilizing the new APT technology guarantees precise measured values with short response times and outstanding signal reproduction at the output – and all this with unparallel sturdiness and long-term stability of the insulation paths under tough industrial conditions.
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...60 mV, 0...100 mV, 0...150 mV, 0...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...10 V, 0...5 V, 0...20 mA 2...10 V, 1...5 V, 4...20 mA see Product line |
|
| Load | Voltage output Current output |
≥ 2 kOhm ≤ 500 Ohm |
| Ripple | < 10 mV rms |
|
General Data
| Transmission error |
< 0,2 % of measuring span |
|
| 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 |
0 °C to +55 °C –25 °C to +80 °C |
| 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 - |
| Devices | Order No. | ||||
| mV Shunt Isolation Amplifier |
DS 78 K - |
X | X | ||
| Input | 0 ... 60 mV | 0 | |||
| ± 60 mV | 1 | ||||
| 0 ... 100 mV |
2 |
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| ± 100 mV | 3 |
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| 0 ... 150 mV |
4 |
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| ± 150 mV | 5 |
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| 0 ... 300 mV | 6 |
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| ± 300 mV | 7 |
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| Output | 0 ... 10 V | 6 |
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| 2 ... 10 V | 7 |
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| 0 ... 5 V | 5 |
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| 1 ... 5 V | 8 |
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| 0 ... 20 mA | 2 |
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| 4 ... 20 mA | 4 |
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| cross connector (2 pcs.) for looping through the power supply for up to 10 TinySnap, splittable |
DZU 0801 |
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| Example: mV Shunt Isolation Amplifier, Input ± 60 mV, Output 4 ... 20 mA |
DS 78 K - |
1 |
4 |
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