Revision 03
August 22, 1997
Section 950-719-100
Page 20
PairGain Engineering - Plant Series
PG-Plus PCS-719
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TB1 FGND Connection
The seven-position power-terminal strip termination point, TB1, is on the shelf backplane. A minimum
of 12 AWG should be used for this connection.
a
Using minimum 12 AWG wire, attach a spade lug connector to terminate the ground wire on the
FGND terminal of TB1.
b
Connect the other end of the frame ground wire to the CO Frame Ground termination point using
locally approved methods.
Power Connections
The TB1 termination point on the COTS backplane provides connections for dual -48 V dc, common battery return,
and frame ground to each of the card slots by way of screw terminals. The shelf can be wired for redundant powering,
split-powering, or single-source powering depending upon requirements. The following sections describe the three
powering options available on this device. The preferred powering method is redundant-shelf powering. Prior to
performing any power connections:
1
Remove all fuses in the equipment bay's fuse panel for the circuit where the PG-Plus -48 V dc power leads
will be terminated until the COTS is wired and ready for turn-up.
2
Run the battery and battery return lines from the fuse panel to the COTS mounting frame using a minimum
of 12 AWG wire.
3
Connect to a reliably grounded -48 V dc source that is electrically isolated from the AC source.
4
The branch circuit overcurrent protection shall be rated 48 V, 20 A.
5
Disconnect both input supply sources before servicing.
Summary of Contents for Pairain PG-Plus PCS-719
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