HEIDENHAIN TNC 415 (259 9x0) Service Manual User Manual
Page 171

SERVICE MANUAL TNC 415B/425
Page 166
Issue: 20.08.95
e) Unscrew the PL 400 from the logic unit.
1)
f) The new PLC I/O board PL 400 is mounted in reverse order:
- Mount the PL 400 to the logic unit.
1)
- Engage the connectors.
- Switch on the main switch.
Exchange is now finished.
*
Warning!
Send and store the boards only in the original packaging material that protects
them from acquiring static charge. Never use conventional plastics to wrap the boards in.
1)
The PL 400 may also be located in the switch cabinet.
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