Handbook
Axell Wireless Limited
Technical Literature
WMATA CRCS Redundant Antenna System
General Overview
Document Number 60-228701HBK Issue No. 3 Date 28/05/2010 Page 17 of 114
3.4. Dual Redundant PSU 60-091705
Dual Redundant PSU 60-091705 is built into a 4U, 19” rack-mount case.
The PSU case houses two mains driven PSU modules whose outputs are parallel combined using high
power, low volt-drop diodes. This means that if either supply fails the other will seamlessly take over all
power provision until the fault is rectified. Both supplies’ outputs are monitored and an alarm will become
active should either module fail.
3.4.1. Dual Redundant PSU 60-091705 List of Major Sub-Components
Component
Part
Part Description Qty Per
Assembly
20-001601 12V Dual Relay Board 1
94-100004 Dual Diode Assembly 1
96-300051 100W PSU Module 2
96-920022 3A Circuit Breaker 2
3.4.2. Dual Redundant PSU 60-091705 Specification
PARAMETER SPECIFICATION
Input
115/230V AC 50/60Hz (nominal, single port)
Outputs
6 x 12V DC at 16A (max. total)
Indicators
Green ‘DC on’ LED
Red LED (alarm1)
Alarm Interface
9-way ‘D’ connector
PSU1 alarm
pins 1 & 2
PSU2 alarm
Pins 1 & 4