Siemens S7-1200 System Manual page 61

Table 3- 7 Removing an SM
Task
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
Procedure
You can remove any SM without removing the CPU or other SMs in place.
1. Ensure that the CPU and all S7-1200 equipment are disconnected from
electrical power.
2. Remove the I/O connectors and wiring from the SM (Page 63).
3. Retract the bus connector.
– Place a screwdriver beside the tab on the top of the SM.
– Press down to disengage the connector from the CPU.
– Slide the tab fully to the right.
If there is another SM to the right, repeat this procedure for that SM.
Remove the SM:
1. Pull out the bottom DIN rail clip to release the SM from the rail.
2. Rotate the SM up and off the rail. Remove the SM from the system.
3. If required, cover the bus connector on the CPU to avoid contamination.
Follow the same procedure to remove a signal module from a signal module.
3.3 Installation and removal procedures
Installation
61