Siemens SIMATIC S7-1200

Technical specifications
A.11 Thermocouple and RTD signal modules (SMs)
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
1479
A.11.2
SM 1231 RTD
SM 1231 RTD specifications
Table A- 172 General specifications
Technical data
SM 1231 AI 4 x RTD x 16 bit
SM 1231 AI 8 x RTD x 16 bit
Article number
6ES7231-5PD32-0XB0
6ES7231-5PF32-0XB0
Dimensions W x H x D (mm) 45 x 100 x 75 70 x 100 x 75
Weight
220 grams
270 grams
Power dissipation 1.5 W
Current consumption (SM Bus)
80 mA
90 mA
Current consumption (24 V DC)
1
40 mA
1
20.4 to 28.8 V DC (Class 2, Limited Power, or sensor power from CPU)
Table A- 173 Analog inputs
Technical data
SM 1231 AI 4 x RTD x 16 bit
SM 1231 AI 8 x RTD x16 bit
Number of inputs
4
8
Type
Module referenced RTD and Ω
Range
Nominal range (data word)
Overshoot/undershoot range (data
word)
Overflow/underflow (data word)
See RTD Sensor selection table (Page 1482).
Resolution
Temperature
0.1 °C/0.1 °F
Resistance
15 bits plus sign
Maximum withstand voltage
± 35 V
Noise rejection
85 dB for the selected noise reduction (10 Hz, 50 Hz, 60 Hz or 400 Hz)
Common mode rejection
> 120dB
Impedance
≥ 10 MΩ
Isolation
Field side to logic
707 V DC (type test)
Field to 24 V DC
707 V DC (type test)
24 V DC to logic 707 V DC (type test)
Channel to channel isolation
none
Accuracy See RTD Sensor selection table (Page 1482).
Repeatability
±0.05% FS
Maximum sensor dissipation
0.5 m W
Measuring principle
Integrating
Module update time
See Noise reduction selection table (Page 1482).
Cable length (meters)
100 meters to sensor max.
Wire resistance
20 Ω, 2.7 Ω for 10 Ω RTD max.