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

2.2.3

Installing and removing a communication module

Installation
Attach the CM to the CPU before installing the assembly as a unit to the DIN rail or panel.
Remove the bus cover from the left side of the CPU:
1. Insert a screwdriver into
2. Gently pry out the cover
Remove the bus cover. Retain the cover for reuse.
Connect the units:
1. Align the bus connector
2. Firmly press the units
Installing the units on the DIN rail or on a panel.
1. For DIN rail mounting, make sure the upper DIN rail clip is in the latched (inner) position
2. Install the CPU and attached CMs as shown in Installing and removing the CPU
3. After installing the devices on the DIN rail, move the lower DIN rail clips to the latched
For panel mounting, make sure the DIN rail clips are pushed to the extended position.
S7-1200 Programmable controller
System Manual, 11/2009, A5E02486680-02
the slot above the bus
cover.
at its top.
and the posts of the CM
with the holes of the CPU
together until the posts
snap into place.
and that the lower DIN rail clip is in the extended position for the CPU and attached
CMs.
(Page 26).
position to lock the devices on the DIN rail.
2.2 Installation and removal procedures
Installation
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