Specifications

4000326 Rev A Chassis 5-3
Power Supply Specifications
Introduction
The Model 6471 Rack-Mount Power Supply provides primary and backup power for
two Prisma chassis.
Each power supply consists of the following three modules:
• Two power supply modules, each providing primary power to one chassis
• One power supply module that provides backup power for both chassis
Each module consists of two sub-modules. One sub-module supplies ±5 V power,
and the other supplies 24 V power.
The rack-mount power supply is available in 120/240 V AC or -48 V DC.
Model 6471-RM 120/240 V AC Rack-Mount Power Supply
Notes:
• Specifications shown reflect typical equipment performance at stated reference
levels in the recommended operating configuration.
• Unless otherwise noted, specifications are based on measurements made in
accordance with NCTA Practices for Measurements on Cable Television Systems
using standard frequency assignments and are referenced to 20°C (68°F).
Electrical Requirements
Parameter Values
Voltage requirements
(Switch-selectable, factory
preset for 120 V AC input)
• 3 x 120/240 V AC (±15%)
• 50.0/60.0 Hz
Power consumption
• 120 V AC: 5.0 A x 3
• 240 V AC: 2.5 A x 3
Output voltage
(One of each per module)
• +24 V DC/7.0 A
• +5 V DC/15.0 A
• -5 V DC/1.6 A
Efficiency ≥ 80%
Line regulation ±0.5%
Load regulation ±3.0%
Power stability ±5.0% over temperature range
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