Industrial Ethernet
Instrumentation Inputs
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Industrial Ethernet |
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ET-8INS Usage Tips
This instrumentation analog input module is ideal for one or more of the following applications:
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Thermocouple temperature measurements |
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Volt or millivolt readings |
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Floating (off ground) 4-20 mA readings |
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Any combination of the above ranges |
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For accuracy better than 0.05% |
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For true differential performance (superior ground loop rejection) |
Current Loop Inputs (4-20 mA channels)
A 100-ohm precision current shunt is present in the base of all analog input modules that read 4-20 mA instrumentation loop signals. If a module is unplugged, current continues to flow in the loop.
The instrumentation module supports multiple input ranges and must only have this shunt across the input for each current loop input. Access the shunt selection jumper for each channel by opening the base access door (with the module removed).
NOTE:
You must set the current shunt jumper inside the base (open the door) for each 4-20 mA input.
Current shunts act as fuses if overloads occur (typically from shorted transmitters or wiring errors). These shunts are field replaceable. A spare shunt is stored inside the base access door.
Instrument loops may be protected from over current by using a SixTRAK ST-CL-20M-16H module.
