Siemens SIMATIC S7-1200 - Page 1448

Technical specifications
A.9 Digital signal modules (SMs)
S7-1200 Programmable controller
1448 System Manual, V4.2, 09/2016, A5E02486680-AK
Table A- 117 Connector pin locations for SM 1222 DQ 8 x 24 V DC (6ES7222-1BF32-0XB0)
Pin
X10
X11
1
L+ / 24 V DC
No connection
2 M / 24 V DC No connection
3
Functional Earth
No connection
4 DQ a.0 DQ a.4
5
DQ a.1
DQ a.5
6
DQ a.2
DQ a.6
7
DQ a.2
DQ a.7
Table A- 118 Wiring diagram for the 8-point digital output relay changeover SM
SM 1222 DQ 8 x Relay Changeover (6ES7222-1XF32-0XB0)
A changeover relay output controls two circuits using a common terminal: one normally
closed contact, and one normally open contact. Using output "0" as an example, when the
output point is OFF, the common (0L) is connected to the normally closed contact (.0X) and
disconnected from the normally open contact (.0). When the output point is ON, the common
(0L) is disconnected from the normally closed contact (.0X) and connected to the normally
open contact (.0).