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3 wire 0-20mA sensor input on MC4x
Kevin 7 years ago
in Master modules / MC4x
•
updated by Gustav Widén (System support) 5 years ago •
6
The installation manual states an example for a 2 wire 0-20mA input into the controller, but there is no reference to a 3 wire input. Are these supported? I'm assuming it will be the same connections just the sensor ground (which does not include the signal) will go to chassis or vref -ve? Can anyone confirm?
Customer support service by UserEcho
Can anyone advise whether it is possible to connect 3 wire to MC4x controllers please?
Hello
Most of the current sensors have 3 wires
Just connect the power to the + and gnd connection and the signal wire to the iqan input
You do not need the vref- because the sensor normally has a controlled current output
Used it with pressure sensors.....works fine
Good morning, sorry, but as this post was marked as Answered, I am not sure if my Replay is seen by someone.
So, I try answering you directly.
Not sure how this forum works at all...
Hello, can someone confirm that the 3 wire sensors can really connect to GND as was said in this post?
Because according the manual: "NOTICE
The negative terminal of the sensor must not be connected to the chassis."
We would like to use the CIN inputs of the XC4x, but our pressure transducers are 3 wire sensors.
Can we connect the negative to -VREF instead ground? Or that doesn't work either?
Thanks in advance!
You could connect the sensor ground either to the module ground or to the -VREF pin on the module.