E-1
A P P E N D I X
E
UPS Controller
This appendix explains the UPS controller (UPC) that controls the uninterruptible
power supply (UPS) unit.
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Section E.1, “Overview” on page E-1
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Section E.2, “Signal Cable” on page E-2
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Section E.3, “Configuration of Signal Lines” on page E-3
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Section E.4, “Power Supply Conditions” on page E-5
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Section E.5, “UPS Cable” on page E-6
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Section E.6, “Connections” on page E-7
E.1
Overview
The UPS is a unit to ensure a stable supply of power to the system even in the event
of a power supply failure or a massive blackout.
When the UPC port on the server is connected to the UPS signal cable that has a
UPC interface, if the UPS detects a power failure, it notifies the server of the failure
so that the server can perform emergency shutdown processing. This stops the
server safely.
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