Siemens SIMATIC S7-1200

Technical specifications
A.6 BB 1297 battery board
Easy Book
Manual, 03/2014, A5E02486774-AF
309
A.5.5
Wiring diagrams for SM 1231 (AI), SM 1232 (AQ), and SM 1234 (AI/AQ)
Table A- 34 Wiring diagrams for the analog SMs
SM 1231 AI 8 x 13 bit
SM 1232 AQ 4 x 13 bit
SM 1234 AI 4 x13 bit / AQ2 x 14 bit
Note
Unused voltage input channels should be shorted.
Unused current in
put 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 exte
rnal power is supplied to the transmitter.