Siemens SIMATIC ET 200M Operating Instructions Manual page 105

Maintenance and service
7.1 Wiring of the ET 200M
Scope of maintenance
The ET 200M is a maintenance-free DP slave.
Maintenance is limited to the replacement or exchanging of modules or components.
7.2 Replacing the Power Supply Module
Initial Situation
The power supply module you want to replace is installed and wired. You want to install a
new power supply module of the same type.
Slot numbering
If you have provided the Power Supply Modules in your system with slot numbering, when
replacing modules you must remove the numbering from the old Power Supply Modules and
then reuse it in the new Power Supply Modules.
Removing the Power Supply Module
To remove the power supply module, proceed as follows:
1. Operate the supply isolating switch in order to de-energize the power supply module.
2. Remove the cover.
3. Disconnect all the wiring.
4. Undo the fixing screws of the power supply module.
5. Swing the power supply module out.
Installing the New Power Supply Module
To install the new power supply module, proceed as follows:
1. Check the setting of the voltage selector switch.
2. Hook the new power supply module of the same type onto the rail and swing it down into
3. Screw the power supply module on securely.
4. Wire the power supply module.
5. Connect the power supply module to the line voltage.
6. Close the cover.
ET 200M
Operating Instructions, 12/2008, EWA-4NEB780600602-08
place.
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