1145B power supply
Issue 4 October 2002 35555-233-116
Installing the 1146 power distribution unit
1. Insert and securely tighten the two supplied #8-32 x 1/2-i n. shoulder
screws (they have an unthreaded section at the top) int o the top holes
designated for 1146 Power Distribution Unit on the bottom plate. Mount the
unit on these two shoulder screws, using the key holes on the back of the
unit.
2. Secure the unit by inserting the #8-32 x 1 in. scr ew through the bottom of
the unit (just above the wire clips) into the plate an d tighten.
3. Set the battery back-up switch option to the 1- 32 (down) position to provide
battery back-up to all outputs.
4. Connect the power distribution unit to the power suppl y with the power
cable. Refer to the power supply’s right-side label to locate the output
power connection.
Installing and wiring the battery
Two types of backup batteries can be used:
To install the battery, proceed as follows.
1. Loosely insert two #10-32 x 1/2-in. shoulder screws in the battery-mounting
holes at the top of the wall mounting plate.
2. Place the keyhole slots in the battery bracket on these t wo screws. Make
sure the label on the battery is visible.
The battery cord exits from the right side of the bracket.
3. Tighten the screws securely.
4. Plug the battery cord into the right rear receptacle on t he power supply.
The right-side label indicates the rear receptac le.
Table 6. Back-Up Batteries
Battery Rating
1148B 2.5 amp-hours
1149B 5 amp-hours