Siemens SIMATIC S7 System Manual page 762

Technical specifications
A.5 Thermocouple and RTD expansion modules (EMs)
Table A- 130 Wiring diagrams for the EM AR02 RTD 2 x 16 bit (6ES7288-3AR02-0AA0) and EM AR04
EM AR02 RTD 2 x 16 bit
(6ES7288-3AR02-0AA0)
Note: Connectors must be gold. See Appendix F, Spare parts and other hardware, for article number.
①
Loop-back unused RTD inputs
②
2-wire RTD
Note: Connectors must be gold. See Appendix F, Spare parts and other hardware for article number.
Table A- 131 Connector pin locations for EM AR02 RTD 2 x 16 bit (6ES7288-3AR02-0AA0)
762
RTD 4 x 16 bit (6ES7288-3AR04-0AA0)
③ ④
3-wire RTD
Pin X10 (gold)
1 L+ / 24 V DC
2 M / 24 V DC
3 Functional Earth
4 AI 0 M+/RTD
5 AI 0 M-/RTD
6 AI 0 I+/RTD
7 AI 0 I-/RTD
EM AR04 RTD 4 x 16 bit
(6ES7288-3AR04-0AA0)
4-wire RTD
X11 (gold)
No connection
No connection
No connection
AI 1 M+/RTD
AI 1 M-/RTD
AI 1 I+/RTD
AI 1 I-/RTD
System Manual, V2.3, 07/2017, A5E03822230-AF
S7-200 SMART