HEIDENHAIN TNC 407 (243 020) Service Manual - Manual (Page 126)

SERVICE MANUAL TNC
Issue:
01.09.1995
Page 106
Loosen the screws and remove the PLC board
4820 6075
Loosen
screws
The new PLC l/O board is mounted in reverse order:
Mount the PLC board to the logic unit.
-Connect the PLC I/O board to the processor board.
Engage the connectors.
-Switch on the main switch.
Exchange is now finished,
Send and store the boards only in the
original packaging that protects them from acquiring
static charge. Never use conventional plastics to wrap the boards in.