User's Manual

260-668066-003 Rev 002 October 2001 3-19
Eclipse Installation Manual
Eclipse Power Supply
Eclipse is designed to operate from a -48 Vdc power supply (+ve earth) but will operate
to specification over a voltage range of -40.5 to -60 Vdc.
A plug-in PCC option provides a voltage conversion function for locations where the
power supply is +24 Vdc. It converts + 24 (19 to 36) Vdc to -56 Vdc for connection to
the INU -48Vdc input. -56 Vdc represents the typical float voltage for a battery-backed
-48 Vdc supply.
One PCC supports a maximum three IRU 600 RFUs, plus any combination of RACs
and DACs.
The dc power supply must be UL or IEC compliant for SELV (Safety Extra Low Voltage)
output (60 Vdc maximum limited).