hello sir,

   I don't know how practically 4 wire sensor is wired to plc analog  input card

What is 4 wire sensor, why it is 4 wire sensor? What purpose is served with 4 wire

Ayman Elotaify

 

siemens plc series

hello sir,

   I don't know how practically 4 wire sensor is wired to plc analog  input card

What is 4 wire sensor, why it is 4 wire sensor? What purpose is served with 4 wire

Hello,

No one here can give you the exact wiring without having the part number or data sheet of your transducer and also the part number of your AI module.

But basiclly, these typr of transducers (4-wire) have two wires for power circuit and the other two wire for the signals which should be connected to the analog input channel.

Hope this helps.

 part no : (6ES7331-7KF02-0AB0

i want to connect 3 wire as well as 4 wire to this module

hi,

the difference between 2-Wire and 4-wire-transducers is that the 2-wire-transducers have their power supply through the measurement-wires. Thats the reason why only 4..20mA-range can be used with it.

With your 3-wire-device you have definitely a seperate power supply, so we can say it is a 4-wire-transducer, but with the "-" of supply and measurement bridged.

Don´t forget the Measurement range module. It has to be on position C

 hope this helps,

regards,