Toshiba CTX28 manual Power Supply Unit BRPSU672A, Red

Rack Mount Cabinets

Power Supply Unit (BRPSU672A)

Power Supply Unit (BRPSU672A)

The BRPSU672A Power Supply Unit (shown below) comes factory installed in each Rack Mount Base and Expansion Cabinet. It furnishes power to all of the stations and some of the peripherals that interface with the cabinet.

The BRPSU672A automatically detects and adjusts for the type of AC voltage (120/208/240) to which it is connected.

	24V Circuit Breaker Assignments:
Base Cabinet			EXP. Cabinet
24V-1	S101, S102	24V-1		S_01, S_02
24V-2	S103, S104	24V-2		S_03, S_04
24V-3	S105, S106	24V-3		S_05, S_06, S_07
24V-4	S107, S108	24V-4		S_08, S_09, S_10

Power Factor (PF) alarm LED indicates the cabinet PF was exceeded. Correct the problem and press the RESET button to clear the alarm.

Mounting Holes

-24V1	DC Voltage
-24V2	Connector Jack
-24V3
-24V4

DC OUT	BATT	Battery Cable
	-	Connector
	+

DC Voltage Specification

+5V (+4.5 ~ +5.5), 4.0 amps		BATT (Volts)
-5V (–4.5 ~ –5.5), 0.8 amps	+	0
Expansion Cabinet only
-24V (–26.3 ~ –27.8), 6.0 amps	–	–26.3 ~ –27.8 2

1. Back Plane DC Voltage Plug must be plugged

into Power Supply when checking voltages.

POW +5V -5V P.F.

RESET

EXP

BASE

FG

7000

OFF	POWER
	ON

AC IN

FG

AC Power Cord Jack

2. On BRPSU672, the BATT output is 0 volts

unless connected to good batteries.

DC Voltage Connector Plug Pin Wires

Yellow	Blue	White	Green	Green	Green
-24	-5	+5	0	0	0
Yellow	Yellow	Yellow	Green	Green	Green
-24	-24	-24	0	0	0

Figure 5-12 Power Supply Unit (BRPSU672A)

Expansion/

Base Switch

FG Frame

Ground Screws

Red

+5

Red

+5

Check the Power Factor Indicator and Reset Button

The front panel of BRPSU672A provides a Power Factor LED and Reset button. If the cabinet power factor is exceeded by overload of PCBs, the PF LED will turn on.

If the PF LED indicator turns on, press the PF reset button with a pointed tool or pencil. If the PF LED turns off and does not turn on again it may have been turned on by a current surge while installing a PCB while the power supply was turned-on.

When a PF alarm is indicated, check that the cabinet power factor is not exceeded using the “Worksheet 7 – System Power Factor Check” on page 2-42. If the Power factor has been exceeded relocate any PCBs that are causing the PF to be exceeded.

5-28 Strata CTX I&M 06/04