Omron SYSMAC C500, Installation Manual

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Appendix A
Inspection and Maintenance
55
3. Remove the screws that mount the Output Unit to the Backplane. Pulling
the Unit toward you, remove the Output Unit from the Backplane.
4. There are eight screws on each side of the Output Unit. Remove these
screws to detach the case from the cover.
5. Pull out the printed circuit board.
6. Insert a new fuse.
7. Reassemble in reverse order.
Output Unit Relays
To replace a Relay in an Output Unit, follow the steps below.
1. Turn OFF the power to the PC.
2. Detach the terminal block from the Output Unit, by removing the screws
located at the top and bottom of the terminal block.
Mounting screws
Located at the top and bottom.
Terminal block mounting screws
Located at the top and bottom of
the terminal block.
Cover mounting screws (8)
3. Remove the screws that mount the Output Unit to the Backplane. Pulling
the Unit toward you remove the Output Unit from the Backplane.
4. There are eight screws on each side of the Output Unit. Remove these
screws to detach the case from the cover.
5. Pull out the printed circuit board. Place the Relays on the circuit board.
6. Use the Relay Puller to pull out the Relay. Insert a new Relay.
7. Reassemble in reverse order.
Batteries
When the battery is nearly discharged, the ALARM indicator blinks and the
message “BATT LOW” appears on the Programming Console. When this oc-
curs, replace the battery within one week to avoid loss of data. The battery
comes with its own connector as a set. To replace the Battery Set follow the
steps below. The entire replacement must be completed within five minutes
to ensure that the data will not be lost.