User manual

Electrical Installation and Cabling
Power Wiring
5-14 July 2004 Wide Bank 28 DS3 - Release 2.4
The Wide Bank is designed to provide redundant power input protection and redundant power
converter protection. For example, if Controller card A loses –48 VDC input power or if its power
converter fails, Controller card B will continue to provide power to all circuits in the Wide Bank.
Prolonged operation with only one power input will reduce reliability.
To conform with UL 1950 third edition, and CSA-C22.2 No. 950-95 Standard for Safety for
Information Technology Equipment, the Wide Bank is equipped with solid-state, automatic-
resetting, current-limiting devices to protect the –48V input and DC return from AC power surges,
lightning, or inductive motor spikes. There are no fuses in the Wide Bank.
Wiring the Power Plugs
Two power plugs are shipped with each Wide Bank for wiring to a –42 to –58 VDC power supply
as described in the following procedure.
DANGER! ENSURE THAT NO POWER IS PRESENT ON THE THREE WIRES FROM THE
POWER SOURCE.
1. Use only 16 AWG or 18 AWG copper wire.
2. Strip the three wires from the power source so that 5/16-inch of bare wire is exposed.
WARNING! BE SURE TO WIRE THE CONNECTOR CORRECTLY, AS DESCRIBED IN
THIS PROCEDURE. WIRING –48 V TO THE WRONG TERMINAL CAN SEVERELY DAMAGE
THE EQUIPMENT OR POWER SUPPLY.
3. Loosen the set screws and insert the wires in the appropriate square holes as shown below, one
at a time, tightening the set screws as you go. When inserting wires, ensure that no bare wire is
exposed.
Figure 5-11 Wiring the Power Plugs
Set screw may
be located on
front or bottom
Insert wire
in square hole
Chassis
Ground
-48 VDC
Battery
Battery
Return
Pin SideWire Side