Siemens ET 200pro Operating Instructions Manual page 521

Connection example based on "RTD (0)" as the reference junction
● With M12 compensation connector (integrated Pt1000 resistance thermometer)
● With external Pt1000 resistance thermometer
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08
①
Connecting the thermocouple directly or using compensating lines
②
M12 compensation connector (terminals 1 and 3 with internal Pt1000 assigned), at circular
socket connector X1 only The setpoint for the M12 compensation connector (Page 401) at
circular socket connector X1 also applies to the thermocouples at X2, X3, and X4.
③
Thermocouple
Figure A-41 Connection example based on "RTD (0)" as the reference junction in the M12
compensation connector
①
M12 connector at circular socket connector X1 only
②
External Pt1000 (α = 0.003851) in the vicinity of the reference junction with copper cables
at terminals 1 and 3. The setpoint for the external Pt1000 at circular socket connector X1
also applies to the thermocouples at X2, X3, and X4.
③
Thermocouple
Figure A-42 Connection example based on "RTD (0)" as the reference junction with external
Pt1000
Appendix
A.5 Connection examples
521