Selection Tables For The Sm 1231 Rtd - Siemens S7-1200 System Manual

Technical specifications
A.9 Thermocouple and RTD signal modules (SMs)
Note
The RTD unused channels can be deactivated. No error will occur if an unused channel is
deactivated.
The RTD module needs to have the current loop continuous to eliminate extra stabilization
time which is automatically added to an unused channel that is not deactivated. For
consistency the RTD module should have a resistor connected (like the 2-wire RTD
connection).
A.9.2.1

Selection tables for the SM 1231 RTD

Table A- 178 Ranges and accuracy for the different sensors supported by the RTD modules
Temperature RTD type
coefficient
Pt 0.003850 Pt 100
climatic
ITS90
DIN EN 60751
Pt 10
Pt 50
Pt 100
Pt 200
Pt 500
Pt 1000
Pt 0.003902 Pt 100
Pt 0.003916
Pt 0.003920
Pt 200
Pt 500
Pt 1000
Pt 0.003910 Pt 10
Pt 50
Pt 100
Pt 500
928
Pin X10 (gold)
7 AI 0 I- /RTD
8 AI 1 M+ /RTD
9 AI 1 M- /RTD
10 AI 1 I+ /RTD
11 AI 1 I- /RTD
Under range
minimum
1
-145.00 °C
-243.0 °C
-243.0 °C
-243.0 °C
-243.0 °C
-273.2 °C
-273.2 °C
X11 (gold)
AI 2 I- /RTD AI 4 I- /RTD
AI 3 M+ /RTD AI 5 M+ /RTD
AI 3 M- /RTD AI 5 M- /RTD
AI 3 I+ /RTD AI 5 I+ /RTD
AI 3 I- /RTD AI 5 I- /RTD
Nominal Nominal
range low limit range high
limit
-120.00 °C 145.00 °C
-200.0 °C 850.0 °C
-200.0 °C 850.0 °C
-200.0 °C 850.0 °C
-200.0 °C 850.0 °C
-240.0 °C 1100.0 °C
-240.0 °C 1100.0 °C
X12 (gold) X13 (gold)
AI 6 I- /RTD
A7 M+ /RTD
AI 7 M- /RTD
AI 7 I+ /RTD
AI 7 I- /RTD
Over Normal
range range
maximum accuracy
@ 25 °C
2
155.00 ° ±0.20 °C
C
1000.0 ° ±1.0 °C
C
1000.0 ° ±0.5 °C
C
1000.0 ° ± 0.5 °C
C
1000.0 ° ± 0.5 °C
C
1295 °C ±1.0 °C
1295 °C ±0.8 °C
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
Normal range
accuracy
-20 °C to
60 °C
±0.40 °C
±2.0 °C
±1.0 °C
±1.0 °C
±1.0 °C
±2.0 °C
±1.6 °C