APC Rack Automatic Transfer Switch AP4421 - Redundant Switch (rack-mountable) - AC 230 V - Ethernet 10/100, RS-232, USB - Output Connectors: 12 - 1U - Black - For P/N: AR109SH4, SCL400RMJ1U, SCL500RMI1UC, SCL500RMI1UNC, SMTL1000RMI2UC, SMTL750RMI2UC
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The APC Rack Automatic Transfer Switch provides reliable, redundant power to single-corded equipment loads, such as servers. It has two input power cords supplying power to the connected loads. If the primary source becomes unavailable or out of the selected range, the Rack ATS will seamlessly source power from the secondary source without interrupting critical loads.