Paradyne 8820-S2-903, 8820-S1-906 User Manual
Replacement DC Power Entry Module
for the 8820 Broadband Access Concentrator
Models 8820-S2-903 and 8820-S1-906
Installation Instructions
Document Number 8820-A2-GZ45-20
October 2004
DC Power Entry Module for the 8820 BAC
The plug-in Power Entry Module (PEM) is used in the 8820 Broadband Access
Concentrator (BAC), model 8820-A2-5xx, to provide 48 V or 60 V power isolation
and distribution, overcurrent protection, and power filtering and monitoring. The
Model 8820-S2-903 PEM accepts –48 VDC, and the Model 8820-S1-906 PEM
accepts –48 VDC or –60 VDC.
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00-16543-01
Figure 1. 8820 Broadband Access Concentrator
The 8820 BAC is shipped with two PEMs installed.
The PEM consists of a printed wiring board (PWB) attached to an L–shaped
faceplate. The PWB holds the electronic circuitry, including a faceplate–mounted
circuit breaker and power input connectors. The PEMs mate with connectors on
the backplane of the BAC. The L–shaped faceplate provides a shelf for dressing
and protecting the wiring and serves as a handle for insertion and removal.
Two PEMs (with separately fused power sources) are always required to provide
power redundancy. When installed in the chassis:
The module on the left is identified as PEM A and handles the A power source.
The module on the right is identified as PEM B and handles the B power
source.
8820-A2-GZ45-20 October 2004 1
Wiring the PEM
HANDLING PRECAUTIONS FOR
!
STATIC-SENSITIVE DEVICES
This product is designed to protect sensitive components from damage
due to electrostatic discharge (ESD) during normal operation. When
performing installation procedures, however, take proper static control
precautions to prevent damage to equipment. If you are not sure of the
proper static control precautions, contact your nearest sales or service
representative.
Each PEM is equipped with an internal 35 amp (Model 8820-S2-903) or 40 amp
(Model 8820-S1-906) circuit breaker. Two separate, unswitched, individually fused
power sources, each capable of safely handling this load, are required for power
redundancy.
The PEMs require 8 AWG wire for their power connections. If stranded wire is
used, do not solder–coat the ends of the wires as this could weaken the
connections.
Although power may be connected to the front of the PEMs, it is recommended
that these connections be made at the rear of the chassis. Either way will work, but
all power inputs must be made either to the front or to the rear of the chassis, not
both.
NOTE:
Both PWR A and PWR B must be powered, else the management card alarm
will be activated.
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48V RTN
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POWER MUST BE DISCONNECTED AT THE SOURCE
BEFORE REMOVING OR INSTALLING THIS PWR ENTRY MODULE
PEM
A
Figure 2. PEM with Internal Power Terminals
IN
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A
L
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B
48V NEG
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BEFORE REMOVING OR INSTALLING THIS PWR ENTRY MODULE
PEM
B
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POWER MUST BE DISCONNECTED AT THE SOURCE
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PEM
Circuit
Breaker
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POWER ENTRY MODULE
LEFT UNIT: LINE A
48V RTN
RIGHT UNIT: LINE B
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POWER MUST BE DISCONNECTED AT THE SOURCE
WARNING!
BEFORE REMOVING OR INSTALLING THIS PWR ENTRY MODULE
48V NEG
00-15326a-02
2 October 2004 8820-A2-GZ45-20
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