Installing and Removing the Module
2-2
IM 178-4
C79000-G7076-C178-01
Removing/Replacing the Module
To remove the IM 178-4, follow the steps outlined below. For further information
about removing modules, refer to the manual
S7-300 Programmable Controller,
Hardware and Installation, CPU Data
1. Turn off the auxiliary voltage and the load voltage at the front connector.
2. Open the front panel. If you require it, remove the label from inside the panel.
3. Release the mounting screw on the front connector and remove the connector.
4. Unplug the bus connector.
Note
If the LAN cable is connected through, you can remove the bus connector from the
DP interface without interrupting the data exchange on the bus.
5. Release the mounting screw on the module.
6. Pull out the bottom of the module from the rail and remove it upwards.
7. If required, install the new module.