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Plexus 9000 Planning and Engineering Guide Planning for Installation
Section 130-200-000 Issue 5, January 24, 2003
Telica, Inc. 6-13
6.1.7.3 Plexus 9000 Chassis
The chassis has a maximum power load rating of 50-amps at –40 Vdc and
must be supported by circuit breakers rated at 50-amps per feeder at the
intermediate power and alarm panel. The maximum current requirement
for three fully loaded chassis is 150-amps at -40 Vdc.
The Plexus 9000 may be powered by a Telica Power and Alarm Panel
mounted in the equipment bay or directly from customer-furnished power
distribution (home run). In the event of loss of power on one of the buses,
the other bus must be able to supply current for the entire Plexus 9000
chassis. Therefore, each bus requires wiring sized to handle up to 50-
amps at –48 Vdc. Each Plexus 9000 requires that power be provided from
two separate A and B 50-amp breakers at –48 Vdc (four wires).
Table 6.1-I. Plexus 9000 Power Connections
Cable/Telica
Part Number System Connector Cable Connector Size and Length
(Max)
Chassis ground/
45-5XXX-1-0 Two terminal studs
for mounting lug Double hole long-barrel
ground lug with two
mounting holes spaced
5/8 (or ¾) center-to-
center #6 AWG and no
max. length
Power (-48 Vdc)
(two for each
power source)/
45-4XXX-1-0 Two terminal studs
for mounting lugs Double hole long-barrel
ground lug with two
mounting holes spaced
5/8 (or ¾) center-to-
center For PAP, use
<10 feet of
#6 AWG.
For Homerun,
determine by
using
Table 6.1-J.
Power (Return)
(two for each
power source)/
45-4XXX-1-0 Two terminal studs
for mounting lugs Double hole long-barrel
ground lug with two
mounting holes spaced
5/8 (or ¾) center-to-
center For PAP, use
<10 feet of
#6 AWG.
For Homerun,
determine by
using
Table 6.1-J.
Note: XXX indicates the cable length in feet. The above cable part numbers are #6
AWG. Cables of other sizes can be obtained from Telica if necessary.