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A.5
Analog signal modules
The following specifications provide a sample of the analog SM modules available for S7-
1200. Refer to the S7-1200 system manual for more information.
Sample analog signal modules
General
Number and type of inputs
(Selectable in groups of 2)
Number and type of outputs
Dimensions W x H x D
Weight
Power dissipation
Current consumption (SM Bus)
Current consumption (24 VDC)
Analog inputs
Type of inputs
Range
Full scale range (data word)
Overshoot/undershoot range
(data word)
1
Overflow/underflow (data word)
Resolution
Maximum withstand voltage/current
Smoothing
2
Noise rejection
3
Impedance
Isolation (field side to logic)
Accuracy (25°C / 0 to 55°C)
Analog to digital conversion time
Common mode rejection
Operational signal range
Cable length (meters)
Refer to the S7-1200 system manual for voltage and current representations of the analog inputs.
1
Refer to the S7-1200 system manual for step response times of the analog inputs.
2
Refer to the S7-1200 system manual for sample rates of the analog inputs.
3
Easy Book
Manual, 05/2009, A5E02486774-01
SM 1231
AI 4x13bit
4 Voltage or Current
(differential)
0
45 x 100 x 75 (mm)
180 grams
1.5 W
80 mA
45 mA
Description
Voltage or Current (differential), selectable in groups of 2
±10 V, ±5 V, ±2.5 V, or 0 to 20 mA
-27,648 to 27,648
Voltage: 32,511 to 27,649 / -27,649 to -32,512
Current: 32,511 to 27,649 / 0 to -4864
Voltage: 32,767 to 32,512 / -32,513 to -32,768
1
Current: 32,767 to 32,512 / -4865 to -32,768
12 bits + sign bit
±35 V / ±40 mA
None, weak, medium, or strong
400, 60, 50, or 10 Hz
≥ 9 MΩ (voltage) / 250 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
than -12 V
10 meters, twisted and shielded
SM 1234
AI 4x13bit AQ 2x14bit
4 Voltage or Current
(differential)
2 voltage or current
45 x 100 x 75 (mm)
220 grams
2.0 W
80 mA
60 mA (no load)
Technical specifications
A.5 Analog signal modules
SM 1232
AQ 2x14bit
0
2 voltage or current
45 x 100 x 75 (mm)
180 grams
1.5 W
80 mA
45 mA (no load)
113
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