Siemens S7-1200 System Manual page 908

Technical specifications
A.8 Analog signal modules (SMs)
Model
Isolation
Field side to logic
Logic to 24 VDC
Field side to 24 VDC
Channel to channel
Accuracy (25 °C / -20 to 60 °C)
Measuring principle
Common mode rejection
Operational signal range
Cable length (meters)
Voltages outside the operational range applied to one channel may cause interference on other channels.
1
Table A- 139 Diagnostics
Model
Overflow/underflow
24 VDC low voltage
Open wire
Table A- 140 Wiring diagrams for the analog input SMs
SM 1231 AI 4 x 13 bit (6ES7 231-4HD32-0XB0)
Note: Connectors must be gold. See Appendix C, Spare Parts for order number.
908
SM 1231 AI 4 x 13 bit
None
±0.1% / ±0.2% of full scale
Actual value conversion
40 dB, DC to 60 Hz
Signal plus common mode voltage must be less than +12 V and greater than -12 V
1
100 m, twisted and shielded
SM 1231 AI 4 x 13 bit
Yes
Yes
4 to 20 mA range only (if input is below -4164; 1.185 mA)
SM 1231 AI 8 x 13 bit
SM 1231 AI 8 x 13 bit
Yes
Yes
SM 1231 AI 8 x 13 bit (6ES7 231-4HF32-0XB0)
System Manual, 03/2014, A5E02486680-AG
SM 1231 AI 4 x 16 bit
500 VAC
500 VAC
500 VAC
None
±0.1% / ±0.3% of full scale
SM 1231 AI 4 x 16 bit
Yes
Yes
S7-1200 Programmable controller