User manual

Wide Bank 28 DS3 - Release 2.4 July 2004 5-13

Electrical Installation and Cabling

Power Wiring

 DC Power Connector Input Requirements ... 5-13

 Wiring the Power Plugs ... 5-14

 Connecting to Power Source ... 5-15

 Applying Power ... 5-16

DC Power Connector Input Requirements

CAUTION! BOTH POWER INPUTS MUST BE CONNECTED WHEN THE WIDE BANK IS

EQUIPPED WITH TWO CONTROLLER CARDS. IF ONLY ONE CONTROLLER IS POWERED,

SERVICE WILL BE INTERRUPTED WHEN THE POWERED CONTROLLER IS REMOVED OR ITS

INTERNAL POWER CONVERTER FAILS.

WARNING! THE POWER CONNECTOR INPUT IS FOR –48 VDC POWER ONLY. THE

POWER AND GROUND WIRES IN THE SUPPLY CABLE MUST BE EITHER 16 AWG OR 18

AWG WIRE. THE POWER SUPPLIED TO THE WIDE BANK MUST BE EXTERNALLY

PROTECTED BY A THREE-AMP CIRCUIT BREAKER OR SLOW-BLOW FUSE IN THE –48 VDC

BRANCH CIRCUIT.

WARNING! WARRANTY DOES NOT COVER FAILURES RESULTING FROM LONG-TERM

OPERATION WITH POWER APPLIED TO ONLY ONE OF THE REDUNDANT

CONTROLLER

CARDS.

NOTE: Carrier Access strongly recommends that power always be applied to both

power input connectors even if the unit is equipped with only one Controller card. Powering

both connectors allows Controller cards to be inserted into either card slot, enables quick

installation of a redundant Controller, and also speeds card replacement and software

upgrades without losing the current configuration settings.

The Wide Bank has two three-pin DC power connector inputs located on the rear connector panel

(see Figure 5-1). Connector A supplies –48 VDC to Controller card A, and connector B supplies

–48 VDC to Controller card B.

If two Controller cards are installed for redundant operation, both power connectors, A and B, must

be connected to a –48 VDC power source to prevent service interruptions in the event of a power

failure or Controller failure. If redundant power sources are not available, both power connectors

can be wired to the same source.