Redundant Switch - Applications Guide March 22, 1999
8
Redundant Switch Function Settings
Use the factory preset settings (defaults).
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: 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 in the Redundant Switch User’s
Manual 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.
Note the following change to the setup procedure: When configuring the number of battery packs with
PowerChute do not set the value to be the same in both UPS XL units. Set the value to be programed into
each Smart-UPS XL equal to the actual number of battery packs connected to the rear of each Smart-UPS
XL. If this is not done properly the runtime will not indicate correctly if the alternate UPS is activated. This
can result in a failure of safe server shutdown capability.
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). 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
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