15
Power and cooling equipment

A0367754 Top Cap Fan

System Hardware-System option 21A
Purpose-The A0367754
Top Cap Fan is
located in the
Fan and Sensor
Panel. It provides cooling for the NT7D14AA CE/PE power Supply AC.
There is no speed or temperature control provided with it. Power. to the Top
Cap Fan is controlled by the circuit breaker located on the back panel of the
pedestal.
Quantity-One per system

NTSC03BJ Switched Mode Rectifier -48V/50A

_-

System Hardware-System option 71 (DC version)
Purpose-Solid
state, switched-mode rectifier. Converts 208/240 VAC
(nominal) to -48 VDC (nominal), with a 50A output. Used in the QCA13
power plant, with up to ten rectifiers in parallel.
Quantity-As required by system power consumption

NT6D40AA Peripheral Equipment Power Supply DC

System Hardware-All
Purpose-The
Peripheral Equipment Power Supply DC is used to provide
power to all peripheral equipment modules in DC systems. It converts -48V
DC to +5V, +8.5V,
+lOV,
+15V, and -48V DC voltages used to power
peripheral equipment logic cards and to supply talk battery to lines and
trunks. This power supply is located in the far left hand card slot labeled
“PE Pwr Sup”.
Equipment identification and ordering information 553-3001-154
.
.