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The APC Zone Auto Transfer Switch Help 

APC’s Rack Automatic Transfer Switch (ATS), also known as the Redundant Switch, is a high availability switch that has two input power cords, one for each AC line, which provide redundant power to connected equipment. The Rack ATS is designed to supply power to the connected load from a primary AC source. If that primary source becomes unavailable for whatever reason, the Rack ATS will automatically begin sourcing power from the secondary source. The transfer time from one source to the other is seamless to the connected equipment. The Networked units have built-in network connectivity, which allows for remote management via Web, SNMP, or Telnet interfaces.

The ATS allows various configurations of UPS, mains supplies and equipment which create greater or lesser degrees of resilience.  In environments where dual-input servers are used with power supplied from two UPS units, for example, any single-input devices are inevitably less resilient, as they derive power from a single source.  By incorporating an ATS which is powered from the two UPS units to provide power to the device, its resilience level increases toward that of the dual input server.

You can use an ATS with inputs from two UPS units, from one UPS and the mains, or even from two dissimilar UPS sources such as a computer room UPS and a local UPS.

             Copyright Computer Network Systems Limited 2007

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