Siemens S7-1200 System Manual page 914

Technical specifications
A.8 Analog signal modules (SMs)
Model
Input impedance
Isolation (field side to logic)
Accuracy (25 °C / -20 to 60 °C)
Analog to digital conversion time
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- 153 Analog outputs
Technical data
Number of outputs
Type
Range
Resolution
Full scale range (data word)
Accuracy (25 °C / -20 to 60 °C)
Settling time (95% of new value)
Load impedance
Behavior on RUN to STOP
Isolation (field side to logic)
Cable length (meters)
Table A- 154 Diagnostics
Model
Overflow/underflow
Short to ground (voltage mode only)
Wire break (current mode only)
24 VDC low voltage
914
SM 1234 AI 4 x 13 bit / AQ 2 x 14 bit
≥ 9 MΩ (voltage) / 280 Ω (current)
None
±0.1% / ±0.2% of full scale
625 μs (400 Hz rejection)
40 dB, DC to 60 Hz
Signal plus common mode voltage must be less than +12 V and greater
1
than -12 V
100 m, twisted and shielded
SM 1234 AI 4 x 13 bit / AQ 2 x 14 bit
2
Voltage or current
±10 V or 0 to 20 mA
Voltage: 14 bits ; Current: 13 bits
Voltage: -27648 to 27648; Current: 0 to 27648
Refer to the section on output ranges for voltage and current (Page 917).
±0.3% / ±0.6% of full scale
Voltage: 300 μS (R), 750 μS (1 uF)
Current: 600 μS (1 mH), 2 ms (10 mH)
Voltage: ≥ 1000 Ω
Current: ≤ 600 Ω
Last value or substitute value (default value 0)
none
100 m twisted and shielded
SM 1234 AI 4 x 13 bit / AQ 2 x 14 bit
Yes
Yes on outputs
Yes on outputs
Yes
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG