Replacing Modules
3-4
FM 456-2 Application Function Module Installation, Hardware, and Startup
C79000-G7076-C458-01
3.2
Replacing an Application Function Module or Expansion
Module in a Module Assembly
Removing the Module
Proceed as follows to remove a module from a module assembly:
1. Switch the central module and all function modules in your S7/M7-400 system
to STOP with the key switch.
2. Switch off the load supply voltage to the modules.
3. Set the standby switch on the power supply module to the position (output
voltage 0 volts).
4. If necessary, remove the covers from the modules. Figure 3-2 shows how to
remove the cover.
– Press the locking lever downwards (1).
– Swing the cover off forwards (2).
(1)
(2)
Figure 3-2
Removing the Cover
5. Unplug the interface module connectors from the module group, including those
to all interface submodules.