Siemens Analog Input and PT 100 RTD

Labotomi

Member
Join Date
Jul 2003
Location
College Station, Texas
Posts
38
Is it possible to use a 3 wire RTD with a Siemens Analog input card without having to linearize the signal prior to the module? The card can be set up for a PT-100 input, but it doesn't say anything about 2 wire or 3 wire.

I can't find any documentation on this or how it should be wired up.
 
If you are using the regular type s7-300 card I think you are. Set the block on the side of the module to read a RTD (A). Wire the + wire on the RTD to the M0+ of the input (Pin 2 if it's the first input). Wire the - Wire to the M0- of the input & also jumper that to the Ic0- input (Pins 3 & 5). Wire the G from the RTD to the Ic0+ input (Pin 4). I just did this the day before yesterday.

analog wiring.jpg
 

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