CONNECTING 2 WIRE E+E RH/T LOOP POWERED SENSOR TO TM173

[dk208]

I am using a TM173OBDM22R , I  have run into an issue with the Analog interface.
I have configure AI1 - AI4 for 4-20mA Input , but the Analog input stopped changing suddenly. and shows only 32768.

I hope the wiring is right , sketch is attached 

What could be the reason ?

[FedericoM · Accepted solution]

Hello,

since you are using an external power supply for the sensor, I think it is missing a wire between the 0V of the power supply and the gnd of AI.

-32768 means input out of range, in the picture you have shown the default settings of AI, try to read the same settings from commissioning to be sure the PLC is really configured as you expect

[dk208]

Yes, Connecting the GND of Analog Module to -ve of DC supply fixes the issue.

Since nothing is mentioned in manual wanted confirmation

[Ammar_M]

Check the Wiring

you will get this value when the mA on the AI out of the range (4-20 mA)
in  your connection, you should take 2 - wires from your sensor to PLC (4-20mA signal to AI and GND of the Sensor to GND of the AI Channel)