Chapter 2 Network Connection Specifications 2-7
2.2 UPS Interface
This section describes the Uninterruptible Power Supply (UPS) interface which
connects to and controls the UPS.

2.2.1 Overview

This interface is used to generate a conventional software interrupt, and to save data
temporarily when a UPS is used to protect against commercial AC power supply
failure.
A UPS unit is used to provide a stable supply of power to the system in the event of
a power failure or an extensive power interruption.
By connecting the UPC port of the server and a UPS which has a UPC interface via
signal cables, you can execute emergency shutdown processing when the
commercial AC power supply failure is detected.

2.2.2 Signal Cables

Use shielded and paired cables. The cables have the following specifications:
■DC resistance (roundtrip/1 pair): 400 Ω/km or less
■Cable length: Up to 10 m (33 ft.)