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 106 of 114
5.18. PSU Housing Shelf 96-300090
These are 1U high, 19” Rack Mount shelves each housing two, 960W, fan cooled, AC mains driven PSU
modules (96-300091) the outputs of which are combined to provide a 24V DC supply to the other chassis in
the system. The DC leads connected to the output terminals (annotated “B” and “C” in section 5.18.2.) are
connected to two pairs of busbars, one on either side of each rack. Separate DC leads for each shelf are
then connected to the busbars, one pair of busbars feeds the shelves loaded into the front of the rack and
the second pair of busbars feeds the shelves loaded into the rear of the rack. The DC leads from the
busbars are terminated with right-angle XLR female connectors which mate with corresponding panel
mounting male XLR connectors on the front panels of those units which require a DC input.
5.18.1. PSU module 96-300091 Specification
Output
DC Voltage
24V
Rated Current
40A
Current Range
0 ~ 40A
Rated Power
960W
Ripple & Noise (max.)
200mVp-p
Voltage Adj. Range
23.2 ~ 24.8V
Voltage Tolerance
±1.0%
Line Regulation
±0.5%
Load Regulation
±0.5%
Setup, Rise Time
1000ms, 60ms/230V AC at full load
Hold Time (Typ.)
16ms/230V AC at full load
Input
Voltage Range
90 ~ 264V AC
127 ~ 370V DC
Frequency Range
47 ~ 63Hz
Efficiency (Typ.)
87%
AC Current (Typ.)
10.5A/115V AC
5.5A/230V AC
Inrush Current (Typ.)
Cold Start 50A
Leakage Current
<1.1mA / 230VAC
Protection
Over Load
105 ~ 125% rated output power
Protection type : Constant current limiting, recovers automatically
after fault condition is removed
Over Voltage
26.4 ~ 32.4V
Protection type : Shut down o/p voltage, re-power on to recover
Over Temperature
75 5°C ±C (TSW1) Detect on heatsink of power transistor
85 5°C ±5°C (TSW2) Detect on heatsink of power diode
Protection type : Shut down o/p voltage, recovers automatically
after temperature goes down