5756B 57
Appendix
Replacing the Controller Board
Only qualified persons should pack, unpack and
handle the controller board while observing the ESD
instructions.
Proceed as follows to replace the controller board:
1. Put the PLC into the STOP state, and switch off the PLC
power supply.
2. Unplug the RS-232 cable, if installed.
Figure 36 Unplugging the RS-232 cable
3. Unplug the remote bus cable.
Figure 37 Unplugging the remote bus cable
5756A 033
5756A 034
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