Verilink 1251 (CG) Configuration/Installation Guide Uživatelský manuál stáhnout pdf

1 -48 Volts: This terminal screw connects to a -48 Volt DC power source.

2 Return: This terminal screw connects to the power source return.

3 Ground: This terminal screw connects the card to the chassis ground.

4 Power: This green LED indicator is ON when -48 VDC power is being supplied to the unit.

5 3 Amp GMT Fuse: These two fuses (F1 and F2) protect the 1251 card from input power shorts.

TRANSPORT

POWER

MAINT

PWR

3 Amp

GMT

1251

TRANSPORT

CARD

-48

RTN

GND

1 2 3 4 55

General

The 1251 Power Maintenance Card is designed to provide temporary

power to a 1555 APC chassis during shelf maintenance periods which

involve the removal or replacement of the Power and Alarm card.

Caution: The 1251 card is not mechanically or electrically com-

patible with the Power and Alarm card slot. Do not insert this card

into Slot 1.

The 1251 front panel contains a screw terminal strip with 3 connectors,

two GMT type power fuses, a power LED indicator, and two card-

retaining thumb screws.

Design Features

• The card may be installed in any vacant 1557 APC card slot.

• The card is compatible with any 1555 APC chassis.

• The card provides fused input protection and a power indicator.

Operation

Refer to the front panel diagram above and to the simplified circuit dia-

gram below for the following operational features.

An external -48 VDC fused source is fed into the card from the front

panel screw terminal strip. This power is then fed through front panel

card fuses F1 and F2 (GMT type, 3 Amps). The power is then fed to

both the A and B power bus pins of the card connector. Both A and B

feeds are diode protected from power reversals.

The front panel power indicator is diode biased to allow the LED to be

on only when the proper polarity of -VDC is wired to the front panel

terminal connections.

Specifications

Mechanical

Dimensions: 10.5" H, 1" W, and 11" D

Weight: approximately 10 ounces

Environmental

Operating Temp: 0° to 50° C(32° to 122°F)

Storage Temp: -20° to 85° C(-4° to 185°F)

Humidity: 95% max (non-condensing)

Part Number

F-1251-001--11

Chassis Ground

Return (B)

-48 VDC (B)

Return (A)

-48 VDC (A)

Fuse F2

Ground

Return

-48 VDC

Simplified Circuit Diagram

Power

Card

Fuse F1

Power

Terminal

Diode

Isolation

Connector

Power/Polarity

ON Indicator

1251 Power Maintenance Card

Configuration Guide

Part Number 45-00062

Rev 1.00

1 2

Shrnutí obsahu

Strany 1 - 1251 Power Maintenance Card

1 -48 Volts: This terminal screw connects to a -48 Volt DC power source. 2 Return: This terminal screw connects to the power source return. 3 Groun

Strany 2 - 1251 Card Installation

4) Connect a wire (26 gauge or larger) from the ‘Ground’ screwterminal to a frame ground. 5) Connect a wire (26 gauge or larger) from the ‘-48’ screw

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