Siemens SIMATIC S7-1200 - Page 1463

Technical specifications
A.10 Analog signal modules (SMs)
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
1463
Table A- 144 Connector pin locations for SM 1231 AI 4 x 16 bit (6ES7231-5ND32-0XB0)
Pin
X10 (gold)
X11 (gold)
1
L+ / 24 V DC
No connection
2 M / 24 V DC No connection
3
Functional Earth
No connection
4 AI 0+ AI 2+
5
AI 0-
AI 2-
6
AI 1+
AI 3+
7
AI 1-
AI 3-
Note
Unused voltage input channels should be shorted.
Unused current input ch
annels 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 p
ower is supplied to the transmitter.