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1264C User Manual
Understanding The 1264C 4-4
Racal Instruments © 1998
AC Interface
AC Power supplied to the 1264C at J400 is fused at F400 and
routed to switch S100 (main On/Off). The secondary side of S100
is routed to the power supply PS1 and to the cooling fan F1. The
in-line connector interface J300/P300 provides the means of
routing the AC power from the rear panel to the power supply
assembly (including S100) and back to the cooling fan.
Cooling System
The cooling fan F1 is located rear of the mainframe.
(Freestanding
Unit Description)
Module cooling air enters at the rear of a 1264C mainframe and is
forced into a pressurized plenum below P2 the VXI modules. The
high pressure in the plenum forces the air through a metered plate
into the P2 connector side of the VXI modules. The air passing
over components in the modules absorbs heat and exits at the P1
side of the modules.
Cooling The
Power Supply
Cooling air is forced into the power supply at the bottom front of
the 1264C routed through the supply and exhausts at the bottom
of the unit.
System Monitor
The System Monitor features include a window comparator on
each VXIbus voltage, fan failure indicator, and a power supply
intake air temperature monitor. Each monitor includes a front
panel LED.
Refer to Figure 4-2 System Monitor Block Diagram and the
description below.
Summary of Contents for 1264C
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