32 Rockwell Automation Publication 825-UM004D-EN-P - November 2012
Chapter 2 Installation
Fuse Replacement
To replace the Power Supply fuse, do the following:
1. De-energize the relay.
2. Remove the eight rear-panel screws, the ground screw, and the relay rear-
pan
el.
3. Remove the Slot A printed circuit board.
4. Locate the fuse on the board.
5. Remove the fuse from the fuse holder.
6. Replace the fuse with a BUSS 2A/250V ABC (ceramic) or equivalent.
7. Insert the printed circuit board into Slot A.
8. Reinstall the relay rear-panel and ground screw, and then energize the relay.
Real-Time Clock Battery Replacement
To replace the real-time clock battery, do the following:
1. De-energize the relay.
2. Remove the eight rear-panel screws, the ground screw, and the
relay rear-
panel.
3. R
emove the Slot B printed circuit board.
4. Locate the battery clip (holder) on the board.
5. Remove the battery from beneath the clip.
6. Properly dispose of the old battery.
7. Install the new battery with the positive (+) side facing up.
8. Insert the printed circuit board into Slot B.
9. Reinstall the relay rear-panel and ground screw, and then energize the relay.
10. Set the relay date and time.
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