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:-
48 of 63
5.2.8 DC/DC Converter, 24V in, 12V 8A out (13-003011)
5.2.8.1 Description
The DC/DC converter fitted is an AFL assembled, high power PCB unit with an 8 amp @
24V in, 12V output capability. The circuit is basically an O.E.M semiconductor regulator
(one side of which has a heatsink mounting plate, that is usually bolted to the casing of a
Cell Enhancer) and smoothing components built onto a printed circuit board with screw
block terminations.
Note: no circuit diagram of the O.E.M. regulator is available. This unit should not be
repaired, only replaced.
5.2.8.2 Technical Specification
PARAMETER SPECIFICATION
Input Voltage Range: 18-28V DC
Output Voltage: 12V±0.5V
Max. Current Load: 8.0Amps
operation: -10°C to +55°C Temperature
Range:
storage: -40°C to +70°C
Size(PCB): 190 x 63mm
Weight (Loaded PCB): 291gms
5.2.8.3 Photo of Regulator PCB (regulator heatsink side)