Section 950-719-100
August 22, 1997
Revision 03
PG-Plus PCS-719
PairGain Engineering - Plant Series
Page 23
Single-Source Powering
The entire shelf is powered from a single source of -48 V dc power fused at 20 amps.
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 situation 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 to the -48A-LOW terminal at TB1 (Figure 8). Connect the opposite end of this wire to the
-48 V dc CO battery supply at the fuse panel.
3
Connect a wire to the Battery Return terminal in position 6 of TB1. Connect the opposite end of this wire to
the battery return of the CO battery supply at the fuse panel.
4
Connect a jumper wire from the -48A-LOW terminal of TB1 to the -48B-HIGH terminal of TB1.
Figure 8
Single-Source Power Wiring
If the -48HIGH and the -48LOW terminals are not jumpered, the COLU power LED will blink,
because one of the power rails is missing.
Summary of Contents for Pairain PG-Plus PCS-719
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