Siemens SIMATIC S7-400 Hardware And Installation Manual page 201

Removing the Cover
For modules with a cover (for example, CPUs), remove these before fitting the
modules together.
Proceed as follows:
1. Press the locking lever down (1).
2. Swing the cover forward and off (2).
Figure 8-7 shows how to remove the cover.
Figure 8-7
S7-400 and M7-400 Programmable Controllers, Installation Manual
C79000-G7076-C424-01
www.gkbpx.com
(1)
(2)
Removing the Cover
Assembling the M7-400
8-19