Connection Of Thermocouples To The Analog Inputs - Siemens SIMATIC ET 200eco PN Operating Instructions Manual

D.2

Connection of thermocouples to the analog inputs

Introduction
Different options are available for the analog I/O device 8 AI RTD/TC 8xM12 for
compensation of the reference junction temperature. The corresponding connection
examples are shown below. In practice, different connection variants may be possible due to
the conditions on site.
Connection example "No" compensation as reference junction
①
②
③
Figure D-2
Connection example "Internal" compensation or "Fixed reference temperature" as reference junction
①
②
Figure D-3
ET 200eco PN
Operating Instructions, 08/2016, A5E01250250-AJ
Copper cables
e. g. compensating box (per channel); thermocouple type B does not need a compensating box
Thermocouple
Connection example "No" compensation as reference junction
Direct connection of the thermocouple or with compensating lines
Thermocouple
Connection example "Internal" compensation or "Fixed reference temperature" as
reference junction
D.2 Connection of thermocouples to the analog inputs
Connection examples
247