Component identification 8
The Power Bus Bar for parallel systems, mounted in the rear of an HP rack, provides the required input and
output connections for the paralleled UPSs and has a single system-rated input connection. The parallel UPS
system can be installed with Output Power Modules or connected to rack-mounted power distribution
systems.
Note these guidelines when configuring the UPS standalone unit or parallel system:
• There is a maximum of four ERMs per UPS.
• Mount ERM(s) for a standalone UPS directly below the UPS or, with rack side panels removed, in an
adjacent rack to the left of the rack containing the UPS.
• Mount ERMs for a parallel system in an adjacent rack to the left of the rack containing the UPSs (rack
side panels removed).
• For consistent runtimes, each UPS in a parallel system should have the same number of ERMs.
• Some load equipment may require phase rotation or phase relationship coordination to ensure proper
operation. Review your equipment manufacturer’s power requirement documents to ensure that your
connected equipment operates correctly.
UPS front panel
Item Description
1
Battery compartment
2
Control buttons
3
4
Electronics compartment
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