APC SU042-1 3000 VA User Manual download pdf (Page 12)

Redundant Switch - Applications Guide March 22, 1999

Smart-UPS Settings

Follow the information given in the Smart-UPS User’s Manual to select the correct Smart-UPS

configuration for the power environment. Follow the Redundant Switch PowerChute plus Configuration

Procedure in the Redundant Switch User’s Manual if you plan to protect a server running a supported

operating system with this Redundant Smart-UPS system. This procedure guides you through configuring

the Smart-UPS units using Redundant Switch.

Installation

Smart-UPS units: Follow the instructions and procedure given in the Smart-UPS Rack Mount

Supplement.

Redundant Switch: The Redundant Switch mounts in the front or the rear of a standard 19” cabinet,

occupying 1U of rack space.

Follow the Redundant Switch User’s Manual Initial Start-Up instructions. Follow the Redundant

Switch PowerChute plus Configuration Procedure if you are using the Redundant Smart-UPS System with a

server running a supported OS and plan to manage the system using PowerChute plus.. Refer to Table 2.

PowerChute plus Supported Operating Systems, below.

Operation with PowerChute plus

The Redundant Smart-UPS System running PowerChute plus provides very high AC power availability.

This is the condition in which both Smart-UPS units are available to provide AC power, battery back up,

and safe server shutdown.

MONITORING HIGH AVAILABILITY

The Redundant Smart-UPS System checks the availability (including battery run time) of both Smart-UPS

units each time a Smart-UPS self test is initiated through PowerChute plus. The PowerChute plus software

is preset to schedule a Smart-UPS periodic self-test every two weeks. You can change the periodic self test

interval to suit the needs of your application (refer to PowerChute plus User’s Manual Configuration /

Schedule Tests and Shutdown) CDROM. Initiating the self test from PowerChute plus executes self -tests

on both the preferred and the redundant UPS (UPS-A and UPS-B, respectively). When both UPS-A and

UPS-B pass self tests, PowerChute plus records the event with the message: Self Test Passed. Self tests of

both Smart-UPS units can also be executed when a self test is initiated locally on UPS-A. If either Smart-

UPS unit fails its self test, PowerChute plus records the event with the message: Self Test Failed: Invalid

Test. With one Smart-UPS unit failing its self test, the Redundant Smart-UPS System is still providing clean

AC power, battery back up, and safe server shutdown functionality through the other Smart-UPS unit. Visit

the installation to further diagnose the situation and/or restore the system,

SWITCHING FROM PREFERRED SOURCE TO REDUNDANT SOURCE

Redundant Switch switches load delivery and communications to the redundant Smart-UPS when it detects

that the power feed from Source A is unable to deliver power to the load. In this case, the availability of the

system drops from very high (with both Smart-UPS available to provide AC power, battery back up, and

safe server shutdown) to the standard availability power protection afforded by a single Smart-UPS.

PowerChute plus records the event of switching to Source B as Self Test Failed: Invalid Test. Examine the

Redundant Switch front panel or the front panels of the Smart-UPS units for details.

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APC SU042-1 3000 VA User Manual Page 12