Siemens SIMATIC S7-1200

Technical specifications
A.10 Analog signal modules (SMs)
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
1459
A.10
Analog signal modules (SMs)
A.10.1
SM 1231 analog input module specifications
Table A- 137 General specifications
Model
SM 1231 AI 4 x 13 bit
SM 1231 AI 8 x 13 bit
SM 1231 AI 4 x 16 bit
Article number
6ES7231-4HD32-0XB0
6ES7231-4HF32-0XB0
6ES7231-5ND32-0XB0
Dimensions W x H x D (mm) 45 x 100 x 75
Weight
180 grams
Power dissipation 2.2 W 2.3 W 2.0 W
Current consumption (SM Bus)
80 mA
90 mA
80 mA
Current consumption (24 V DC)
45 mA
65 mA
Table A- 138 Analog inputs
Model
SM 1231 AI 4 x 13 bit
SM 1231 AI 8 x 13 bit
SM 1231 AI 4 x 16 bit
Number of inputs
4
8
4
Type Voltage or current (differential): Selectable in groups of
2
Voltage or current (differ-
ential)
Range ±10 V, ±5 V, ±2.5 V, 0 to 20 mA, or 4 mA to 20 mA ±10 V, ±5 V, ±2.5 V, ±1.25
V, 0 to 20 mA or 4 mA to
20 mA
Full scale range (data word)
-27648 to 27648 voltage / 0 to 27648 current
Overshoot/undershoot range
(data word)
Refer to the section on analog input
ranges for voltage and current
(Page 1471).
Voltage: 32511 to 27649 / -27649 to -32,512
Current: 32511 to 27649 / 0 to -4864
Overflow/underflow (data word)
Refer to the section on input rang-
es for voltage and current
(Page 1471).
Voltage: 32767 to 32512 / -32513 to -32768
Current 0 to 20 mA: 32767 to 32512 / -4865 to -32768
Current 4 to 20 mA: 32767 to 32512 (values below -4864 indicate open wire)
Resolution1
12 bits + sign bit
15 bits + sign bit
Maximum withstand voltage/current
±35 V / ±40 mA
Smoothing None, weak, medium, or strong
Refer to the section on step response times (Page 1470).
Noise rejection 400, 60, 50, or 10 Hz
Refer to the section on sample rates (Page 1470).
Input impedance ≥ 9 MΩ (voltage) / 280 Ω (current) ≥ 1 MΩ (voltage) /
<315 Ω, >280 Ω (current)