Analog Input Specifications For Rtd And Tc (Sm And Sb) - Siemens SIMATIC S7-1200 Manual

Technical specifications
A.7 RTD and Thermocouple modules
Table A- 47 Wiring diagrams for the TC SMs
SM 1231 AI 4 TC (16 bit)
A.7.4

Analog input specifications for RTD and TC (SM and SB)

Table A- 48 Analog inputs for the RTD and TC modules (SB and SM)
Technical data
Number of inputs
Type
Range
Nominal range (data word)

Overshoot/undershoot range (data word)

Overflow/underflow (data word)

Resolution Temperature
Resistance / voltage
Maximum withstand voltage
Noise rejection
Common mode rejection
Impedance
Isolation Field side to logic
266
SM 1231 AI 8 TC (16 bit)
RTD and Thermocouple (TC)
1 (SB), 4 or 8 (SM)
RTD: Module referenced RTD and Ω

TC: Floating TC and mV

See the RTD/TC type tables:
RTD (Page 268)

TC (Page 267)

0.1° C / 0.1° F
15 bits plus sign
± 35 V
85 dB for the selected filter setting
(10 Hz, 50 Hz, 60 Hz or 400 Hz)
> 120 dB at 120 VAC
≥ 10 MΩ
500 VAC
Notes
①
SM 1231 AI 8 TC: For
clarity, TC 2, 3, 4, and 5 are not
shown connected.
Easy Book
Manual, 11/2011, A5E02486774-04