Technical data

7-2
Power Supplies
7
The power supply is mounted in a module next to the card cage. If
the power supply fails, the module is replaced as a unit. The power
supply receives –24/–48Vdc or 115/230Vac input power directly
through the back panel of the system. The power supply plugs into
a backplane connector, which applies operating voltages from the
power supply to the VME card cage, the cooling fan, and (if
installed) the drive modules.
Removal
!
Warning
Removal of a power supply module involves exposure
to high voltages. Avoid touching the connectors. Allow
one minute for the capacitors in the power supply to
discharge.
1. Switch the power supply of the system to the position
(Standby) and disconnect the system from the AC or DC
power source:
– If the power supply is an AC unit, unplug the power cord
from the AC outlet.
– If the power supply is a DC unit, turn off the –24/–48Vdc
power source and unplug the DC connector from the
power supply input.
2. After waiting for the capacitors in the power supply to
discharge (at least one minute), remove the front bezel.
3. At the upper left side of the power supply module, loosen the
captive screw that holds the module in the chassis.
4. Slide the module out.