Dear all,

Iam using SM 1231 RTD module & it is configured as PT 100 thermal resistor 2 wire system.

But when it is connected to rtd module, a red light is blinking in CPU & RTD module.

I check the wiring, it is correct. I measure the resistance and the value is 132.3 ohm.

So please reply .

Thanks

Dear sir

I will be verythankfull to you that you reply me.

I have attached the wiring connection and arrangement of this module.
Currently iam not connected to plc so i can't send the diagnosis screen.
But the message appearing in the diagnosis screen is "Low limit voilated"
I measure the resistance across theRTD which is 132 ohms.

Please reply sir,

New question published by voliem62 is split to a separate thread with the subject Problem with modul RTD sm1231.

Best regards
Min_Moderator

New question published by mxiaoxi is split to a separate thread with the subject 3 PT100(2 wires) connected to module SM1231 - 3 PT100 seems to be in parallel condition..

Best regards
Jen_Moderator