Siemens SIMATIC S7-1200 - Page 1481

Technical specifications
A.11 Thermocouple and RTD signal modules (SMs)
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
1481
Table A- 176 Connector Pin Locations for SM 1231 RTD 4 x 16 bit (6ES7231-5PD32-0XB0)
Pin
X10 (gold)
X11 (gold)
X12 (gold)
X13 (gold)
1
L+ / 24 V DC
No connection
No connection
No connection
2 M / 24 V DC No connection No connection No connection
3
Functional Earth
No connection
No connection
No connection
4 AI 0 M+ /RTD AI 1 M+ /RTD AI 2 M+ /RTD AI 3 M+ /RTD
5
AI 0 M- /RTD
AI 1 M- /RTD
AI 2 M- /RTD
AI 3 M- /RTD
6
AI 0 I+ /RTD
AI 1 I+ /RTD
AI 2 I+ /RTD
AI 3 I+ /RTD
7
AI 0 I- /RTD
AI 1 I- /RTD
AI 2 I- /RTD
AI 3 I- /RTD
Table A- 177 Connector Pin Locations for SM 1231 RTD 8 x 16 bit (6ES7231-5PF32-0XB0)
Pin
X10 (gold)
X11 (gold)
X12 (gold)
X13 (gold)
1
L+ / 24 V DC
No connection
No connection
No connection
2
M / 24 V DC
No connection
No connection
No connection
3
Functional Earth
No connection
No connection
No connection
4
AI 0 M+ /RTD
AI 2 M+ /RTD
AI 4 M+ /RTD
AI 6 M+ /RTD
5
AI 0 M- /RTD
AI 2 M- /RTD
AI 4 M- /RTD
AI 6 M- /RTD
6
AI 0 I+ /RTD
AI 2 I+ /RTD
AI 4 I+ /RTD
AI 6 I+ /RTD
7
AI 0 I- /RTD
AI 2 I- /RTD
AI 4 I- /RTD
AI 6 I- /RTD
8
AI 1 M+ /RTD
AI 3 M+ /RTD
AI 5 M+ /RTD
A7 M+ /RTD
9
AI 1 M- /RTD
AI 3 M- /RTD
AI 5 M- /RTD
AI 7 M- /RTD
10
AI 1 I+ /RTD
AI 3 I+ /RTD
AI 5 I+ /RTD
AI 7 I+ /RTD
11
AI 1 I- /RTD
AI 3 I- /RTD
AI 5 I- /RTD
AI 7 I- /RTD
Note
The RTD unused channels can be deactivated. No er
ror 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 sho
uld have a resistor connected (like the 2-wire RTD
connection).