Connect a 4-20 mA displacement sensor

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JPeGfr
Posts: 5
Joined: 26 Apr 2023, 13:30

Connect a 4-20 mA displacement sensor

Post by JPeGfr »

Hello,
I have an ASM WS10 posiwire displacement transducer with a 2-wire output.
The output operates in 4-20mA.
I've tried to find a way of connecting this sensor to the RevPI's AIO module, but I can't get any variation in the input when I pull on the sensor's string.
I've tried supplying the sensor with 24V without success.
I've tried connecting the sensor only to the two terminals of the REvPI without a power supply, without success either.
I'm having trouble understanding the internal wiring of the RevPI's current input.
Is a load resistor already built into the RevPI input or does it have to be added in series with the input?
Here is the diagram supplied with the sensor.
Capture d’écran 2023-07-26 192640.png
Capture d’écran 2023-07-26 192640.png (17.38 KiB) Viewed 8565 times
Should I connect the 0V marker shown on this diagram to the * input (terminal 25 of the AIO module) or the - input (terminal 23)?
Should I connect the + Ub mark on the diagram to the + terminal (number 27 on the AIO module)?

Thank you for your answers
JPeGfr
Posts: 5
Joined: 26 Apr 2023, 13:30

Re: Connect a 4-20 mA displacement sensor

Post by JPeGfr »

Hello,
Thanks to various sources, including this forum, I've found a working solution.
I am submitting the diagram below in order to capitalise on my research and help those who, like me, are just starting out with REvPI.
I am very interested in any comments from moderators or people with experience of this platform.

Yours sincerely
signal-2023-07-26-195641_002.jpeg
signal-2023-07-26-195641_002.jpeg (142.26 KiB) Viewed 8558 times
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