Installing And Removing A Signal Module - Siemens SIMATIC S7 System Manual

Removal
To prepare the CPU for removal, remove power from the CPU and disconnect the I/O
connectors, wiring, and cables from the CPU. Remove the CPU and any attached
communication modules as a unit. All signal modules should remain installed.
If a signal module is connected to the CPU, retract the bus connector:
1. Place a screwdriver beside the tab on the top of the signal module.
2. Press down to disengage the connector from the CPU.
3. Slide the tab fully to the right.
Remove the CPU:
1. Pull out the DIN rail clip to release the CPU from the rail.
2. Rotate the CPU up and off the rail, and remove the CPU from the system.
2.2.2

Installing and removing a signal module

Installation
Install your SM after installing the CPU.
Remove the cover for the connector from the right side of the CPU.
 Insert a screwdriver into the slot above the cover.
 Gently pry the cover out at its top and remove the cover. Retain the cover for reuse.
S7-1200 Programmable controller
System Manual, 11/2009, A5E02486680-02
2.2 Installation and removal procedures
Position the SM beside the CPU.
1. Hook the SM over the top of the DIN rail.
2. Pull out the bottom DIN rail clip to allow the SM to fit
over the rail.
3. Rotate the SM down into position beside the CPU
and push the bottom clip in to latch the SM onto the
rail.
Installation
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