Auxiliary power supplies
555-233-116
36 Issue 4 October 2002
Installing the expanded power distribution unit
You can install a second power-distribution unit for additional 8400- and 8500-
series terminals.
!CAUTION:
Total power cannot exceed 200 W. Consult the chart below for permissible
terminal installations.
Each expanded power distribution unit kit supplies the following items:
■One power distribution unit
■One T-cable
■Two #8-32 x 1/2-in. shoulder screws
■One #8-32 x 1 in. screw
■One spacer bracket
See Figure 4 while installing the power distribution unit:
1. Fasten the spacer bracket to the mounting plate with th e #8-32 x 1/2-in.
shoulder screws.
The spacer bracket is not shown in the figure. It is behind the top power
distribution unit.
2. Slide the keyhole slots in the power distribution u nit over the shoulder
screws.
3. Insert the #8-32 x 1 in. screw through the distribution uni t, through the
spacer bracket, and into the plate. Tighten the screw.
The mounting hole is located just above the wire clip.
4. Set the battery back-up switch to the 1-32 (down) posit ion.
5. Power-down the 1145B as described on the label on the side of the unit.
Table 7. Permissible terminal installations (total power < 200 W)
Terminal mix Maximum numbers Notes
7500-series + 8500-series ISDN 24 + 24
7400-series + 8400-series DCP 24 + 24
8400-series DCP 74
7400-series DCP 74 Average power per
terminal must be
less than 3.126 W