Paradyne DC Power Entry Module 8820-S1-906 Manuale utente

8820-A2-GZ45-20 October 2004 1

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.

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.

00-16543-01

Power

Entry

Modules

ALARMS

MajorMinor

Fan

POWER

SERIAL

SMCM

CLOCK

ALARM

24681012141618

135

7911131517

LAN/WAN SLOT

CLOCK

SERIAL

MCC

ALARM

48V RTN

48V NEG

POWER ENTRY MODLE

LEFT NIT: LINE A

RIGHT NIT: LINE B

WARNING!

POWER MUST BE DISCONNECTED AT THE SOURCE

BEFORE REMOVING OR INSTALLING THIS PWR ENTRY MODULE

48V RTN

48V NEG

POWER ENTRY MODLE

LEFT NIT: LINE A

RIGHT NIT: LINE B

WARNING!

POWER MUST BE DISCONNECTED AT THE SOURCE

BEFORE REMOVING OR INSTALLING THIS PWR ENTRY MODULE

DSL

SYSTEM

Alm

Test

ETHERET

Coll

DSL PORT

MCP

SYSTEM

Alm

Test

ETHERET

Coll

2October 2004 8820-A2-GZ45-20

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.

Figure 2. PEM with Internal Power Terminals

SERIAL

SMCM

CLOCK

ALARM

24681012141618

135

7911131517

LAN/WAN SLOT

CLOCK

SERIAL

MCC

ALARM

48V RTN

48V NEG

POWER ENTRY MODLE

LEFT NIT: LINE A

RIGHT NIT: LINE B

WARNING!

POWER MUST BE DISCONNECTED AT THE SOURCE

BEFORE REMOVING OR INSTALLING THIS PWR ENTRY MODULE

48V RTN

48V NEG

POWER ENTRY MODLE

LEFT NIT: LINE A

RIGHT NIT: LINE B

WARNING!

POWER MUST BE DISCONNECTED AT THE SOURCE

BEFORE REMOVING OR INSTALLING THIS PWR ENTRY MODULE

00-15326a-02

PEM

Circuit

Breaker

48V RTN

48V NEG

POWER ENTRY MOD LE

LEFT NIT: LINE A

RIGHT NIT: LINE B

WARNING!

POWER MUST BE DISCONNECTED AT THE SOURCE

BEFORE REMOVING OR INSTALLING THIS PWR ENTRY MODULE

PEM

APEM

8820-A2-GZ45-20 October 2004 3

WA R N IN G S:

It is recommended that the following procedure be performed by a

qualified electrician.

The 48 VDC or 60 VDC power must be disconnected at its source before

attempting to connect wiring to the PEM. Do not remove wired PEMs

without first disconnecting the power at its source.

You need a Phillips screwdriver to remove the PEM from the BAC.

Removing the PEM from the BAC

Procedure

1. Ensure that the power is disconnected at the source.

2. Open the PEM circuit breaker (power off).

3. Remove the PEM to be wired from the chassis by unfastening the two screws

from the PEM faceplate. Save these screws since they will be needed when

the wired PEM is reinstalled into the chassis.

4. Grasp the flange on the extended shelf at the bottom of the PEM faceplate.

5. Pull the module toward you until it is disengaged from the backplane, and then

carefully slide the PEM out of the chassis.

6. Remove the two M4 Phillips–head screws installed in the power taps located

on the left and right side of the PEM wiring board. Also remove the two split

cable bushings from the PEM faceplate if they are installed.

00-16713

48V RTN

48V NEG

POWER ENTRY MOD LE

LEFT NIT: LINE A

RIGHT NIT: LINE B

WARNING!

POWER MUST BE DISCONNECTED AT THE SOURCE

BEFORE REMOVING OR INSTALLING THIS PWR ENTRY MODULE

Ring Tongue

Terminal

M4 Phillips-head

Screw

Power Tap

4October 2004 8820-A2-GZ45-20

Installing the Replacement Power Entry Module in the 8820 BAC

Procedure

1. Apply the supplied compression–type ring tongue terminals to the #8 AWG

power wires. Use the Molex Magna Crimp Hand Tool (Part No. MCT–8200).

2. Fasten the #8 AWG wires, with their ring tongue terminals properly installed, to

the power taps using the M4 Phillips-head screws.

— Connect the negative wire to the power tap on the right (48V NEG is

printed on the front of the PEM’s faceplate).

— Connect the return or positive wire to the power tap on the left

(48V RTN is printed on the front of the faceplate).

Tighten the M4 screws securely to the power taps while keeping the ring

tongue terminals and their wires dressed parallel to the board and

perpendicular to the faceplate.

3. Feed and dress the power wires through the notched holes at the top of the

PEM’s faceplate.

4. Slightly spread open the split cable bushings and slip them over each wire and

into the holes at the top of the faceplate. Press on the cable bushing to snap it

into the faceplate.

5. Slide the PEM into the chassis using the nylon card guides.

6. Secure the PEM to the chassis using the mounting screws removed from the

PEM.

Warranty, Sales, Service, and Training Information

Contact your local sales representative, service representative, or distributor

directly for any help needed. For additional information concerning warranty, sales,

service, repair, installation, documentation, training, distributor locations, or

Paradyne worldwide office locations, use one of the following methods:

Internet: Visit the Paradyne World Wide Web site at www.paradyne.com.

(Be sure to register your warranty at www.paradyne.com/warranty.)

Telephone: Call our automated system to receive current information by fax

or to speak with a company representative.

— Within the U.S.A., call 1–800–870–2221

— Outside the U.S.A., call 1–727–530–2340

.

*8820-A2-GZ45-20*

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