User's Manual

P B L Tunnel Units 1 & 2
Maintenance Handbook
H/book Number:-60-056100HBKMFCC
Issue No:-2
Date:-04/01/2006
Page:-
24 of 63
5.1.3 JWS75-15/A PSU (96-300045)
5.1.3.1 Description
The power supply unit is a switched-mode type capable of supplying 24V DC at 3.25Amps
continuously. This PSU is used to provide power for the fibre optic modules which will
typically require less than 1.50 Amps at 15V DC, so the PSU will be used conservatively
ensuring a long operational lifetime.
No routine maintenance of the PSU is required. If a fault is suspected, then the output
voltage from the power supply may be measured on its output terminals. The output voltage
is set at test but can be adjusted by a multi-turn potentiometer mounted close to the DC
output terminals.
All the PSU’s used in AFL Cell Enhancers are capable of operation from either 110 or
220V nominal AC supplies. The line voltage is sensed automatically, so no adjustment or
link setting is needed by the operator.
5.1.3.2 Technical Specification
AC Input Supply:
110 or 220V nominal
Voltage:
90 to 132 or 180 to 264V
(absolute limits)
Frequency: 47 to 63Hz
DC Output Supply:
24V DC (nominal)
Voltage:
22 to 26V (absolute limits)
Current: 6.25A