Maintenance 137
1. Stop, de-energize and ground the drive following the steps in section Shutting down
the drive for maintenance before you start the work.
2. Switch off all miniature circuit breakers in the control compartment.
3. Unplug all fiber optic links on the daughter boards and fiber optic links Y1,Y2,Y3,Y4,
power supply connector (X1), signal connectors (X2) and the pressure tube.
4. Hold the control hub, loosen the 8 fixing screws on the mounting plate and remove the
module.
5. Install the new control hub in reverse order.
6. When the work is completed the drive can be started up again. See Chapter
Operation, Energizing and starting the drive.
Control hub daughter board
The control hub daughter boards are mounted in slots on the control hub board.
1. Stop, de-energize and ground the drive following the steps in section Shutting down
the drive for maintenance before you start the work.
2. Switch off all miniature circuit breakers in the control compartment.
3. Unplug all fiber optic links on daughter boards.
4. Loosen the screws of the retainer and remove it.
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