User's Manual

Table Of Contents
ECLIPSE INSTALLATION MANUAL
Power Supply
Eclipse is designed to operate from a -48Vdc power supply (+ve earth) but will oper-
ate 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 Volt-
age) output (60Vdc maximum limited).
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