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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
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