Connections
SCP-PCS718-010-06H
30
January 6, 2003
PCS-718 List 1
Single Source Powering
In this configuration, the entire shelf is powered from a single source of –48 Vdc power fused according to
and
.
A four-position jumper is in place on the TB1 block. This jumper shorts all of the 48 VDC inputs together to
prevent an alarm condition when only one input feed wire is connected. To provide single source powering:
1
Ensure that the ground connection is in place.
2
Connect a wire from the –48A-LOW terminal at TB1 (
) to the CO battery supply at the fuse panel.
3
Connect a wire from the Battery Return terminal in position 6 of TB1 to the battery return of the CO battery
supply at the fuse panel.
4
The four-position jumper from the –48A-LOW terminal of TB1 to the –48B-HIGH terminal of TB1 should
be installed as shown in
Figure 9.
Single Source Power Wiring
If the –48HIGH and the –48LOW terminals are not jumpered, the COLU power LED blinks because one
of the power rails is missing.
