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System Power
Figure 19.
AC PEMs
DC System Power
The VMG-14+ can be powered using a regular telecommunications power supply of -48 nominal VDC
with a VDC return. The specified voltage range is from -41 VDC to -60 VDC. The VMG-14+ supports
redundant power supplies; each power supply should be independently powered by a dedicated
source.
Note:
The DC PEMs are hot swappable FRUs. During servicing, however, remove only one PEM at a time
to ensure that the system does not lose power.
For maximum fault tolerance, the PEMs should be independently powered by separate feeds.
Up to four pluggable DC PEMs can be installed into the rear power bay of the VMG-14+ chassis.
Each PEM provides power terminals for one 70A power feed.
•
Each power feed consists of a -48V DC cable and its corresponding return cable.
•
When cabled, the DC connectors should be shielded by the snap-on DC PEM terminal block cover
•
(Figure
20). See also
Figure 20.
DC PEM
Captive
Screws
Front Panel
Selenio
TM
VMG-14+ Hardware Setup Guide
"DC PEM Terminal Block Cover" on page
Circuit Breaker
Connector
Imagine Communications power cords for VMG-14+ AC s
33.
DC PEM
Terminal
Block
Cover
Gen2 Release 1.4.0
REAR
32
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