Siemens SIMATIC S7-1200 System Manual page 1448

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Table of Contents

Technical specifications

A.9 Digital signal modules (SMs)

Table A- 117 Connector pin locations for SM 1222 DQ 8 x 24 V DC (6ES7222-1BF32-0XB0)

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).

L+ / 24 V DC

Functional Earth

No connection

S7-1200 Programmable controller

System Manual, V4.2, 09/2016, A5E02486680-AK