Siemens S7-1200 System Manual page 909

Table A- 141 Connector pin locations for SM 1231 AI 4 x 13 bit (6ES7 231-4HD32-0XB0)
Table A- 142 Connector pin locations for SM 1231 AI 8 x 13 bit (6ES7 231-4HF32-0XB0)
Table A- 143 Wiring diagram for the analog input SM
SM 1231 AI 4 x 16 bit (6ES7 231-5ND30-0XB0)
Note: Connectors must be gold. See Appendix C, Spare Parts for order number.
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
Pin X10 (gold)
1 L+ / 24 VDC
2 M / 24 VDC
3 GND
4 AI 0+
5 AI 0-
6 AI 1+
7 AI 1-
Pin X10 (gold)
1 L+ / 24 VDC
2 M / 24 VDC
3 GND
4 AI 0+
5 AI 0-
6 AI 1+
7 AI 1-
No connection
No connection
No connection
AI 2+
AI 2-
AI 3+
AI 3-
X11 (gold)
No connection No connection
No connection No connection
No connection No connection
AI 2+ AI 4+
AI 2- AI 4-
AI 3+ AI 5+
AI 3- AI 5-
Technical specifications
A.8 Analog signal modules (SMs)
X11 (gold)
X12 (gold) X13 (gold)
No connection
No connection
No connection
AI 6+
AI 6-
AI 7+
AI 7-
909