I am a PLC newbie, so forgive me if there is a simple solution; I have a new Omega 0-10V differential pressure transmitter that I am trying to use for level detection on my Micrologix 1400 (replacing a conductivity level probe that is not accurate enough). When I have the output wire disconnected from the PLC (ie: transmitter is receiving the 0 and 10V input, voltmeter is connected to the 0V and output line out of the transmitter), I see the voltage output I expect, and when I drive 10V to the PLC through the output wire at the instrument and the 0V wire, I get the raw value I expect in micrologix, but when I connect the output from the transmitter to the PLC, the voltage drops to 0.98V (I see the corresponding raw value in micrologix) and I get no response from the transmitter - it stays at 0.98V no matter what the level is. The I/O is configured for -10/+10V, not 4-20mA. Does anyone have an idea of what is going on?
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