Siemens S7-1200 - Sm 1231 Rtd

Technical specifications
A.9 Thermocouple and RTD signal modules (SMs)
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
925
A.9.2
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
Order number
6ES7 231-5PD32-0XB0
6ES7 231-5PF32-0XB0
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
1.5 W
Current consumption (SM Bus)
80 mA
90 mA
Current consumption (24 VDC)
1
40 mA
40 mA
1
20.4 to 28.8 VDC (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
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 928).
See RTD Sensor selection table
(Page 928).
Resolution
Temperature
0.1 °C/0.1 °F
0.1 °C/0.1 °F
Resistance
15 bits plus sign
15 bits plus sign
Maximum withstand voltage
± 35 V
± 35 V
Noise rejection 85 dB for the selected noise reduction
(10 Hz, 50 Hz, 60 Hz or 400 Hz)
85 dB for the selected noise reduction
(10 Hz, 50 Hz, 60 Hz or 400 Hz)
Common mode rejection
> 120dB
> 120dB
Impedance
≥ 10 MΩ
≥ 10 MΩ
Isolation
Field side to logic
500 VAC
500 VAC
Field to 2 VDC
500 VAC
500 VAC
24 VDC to logic
500 VAC
500 VAC
Channel to channel isolation
none
none
Accuracy See RTD Sensor selection table
(Page 928).
See RTD Sensor selection table
(Page 928).
Repeatability
±0.05% FS
±0.05% FS
Maximum sensor dissipation
0.5 m W
0.5 m W
Measuring principle
Integrating
Integrating
Module update time See Noise reduction selection table
(Page 928).
See Noise reduction selection table
(Page 928).