Siemens S7-1200 System Manual page 915

Table A- 155 Wiring diagrams for the analog input/output SM
SM 1234 AI 4 x 13 Bit / AQ 2 x 14 bit (6ES7 234-4HE32-0XB0)
Note: Connectors must be gold. See Appendix C, Spare Parts for
order number.
Table A- 156 Connector pin locations for SM 1234 AI 4 x 13 Bit / AQ 2 x 14 bit (6ES7 234-4HE32-
Note
Unused voltage input channels should be shorted.
Unused current input channels should be set to the 0 to 20 mA range and/or disable broken
wire error reporting.
Inputs configured for current mode will not conduct loop current unless the module is
powered and configured.
Current input channels will not operate unless external power is supplied to the transmitter.
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
0XB0)
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-
X11 (gold)
No connection No connection
No connection No connection
No connection No connection
AI 2+ No connection
AI 2- No connection
AI 3+ No connection
AI 3- No connection
Technical specifications
A.8 Analog signal modules (SMs)
X12 (gold) X13 (gold)
No connection
No connection
No connection
AQ 0M
AQ 0
AQ 1M
AQ 1
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