APC AP9621 Specifications download pdf (Page 18)

In this application, the Redundant Switch is connected to two separate

AC sources. Loads with a single or multiple power cords can now have

N+1 power paths in case of a single AC source failure. The AC sources

can originate at a centralized UPS, a generator set, or even separate

utilities. Protection: This application protects against failure of one of

the two AC sources; these problems can range from a tripped circuit

breaker to a utility blackout to a centralized UPS failure.

In this application, the Redundant Switch is connected to two separate AC

sources. A single Smart-UPS is then connected to the Redundant Switch,

thereby providing the Smart-UPS with dual AC input feeds. Protection: A

Smart-UPS in the power path will provide full time surge suppression and

utilize battery backup should both of the two AC sources fail. Smart-UPS

protects against brownout, blackouts, and overvoltages that affect the

entire distribution system. With a Smart-UPS, there is also graceful serv-

er shutdown, power monitoring, and power management.

Mirrored UPS Protection

With dual input power cords, Redundant Switch has

the ability to source power from one of two separate

AC circuits. The Redundant Switch continuously

monitors both AC circuits and will switch automati-

cally from the primary to the redundant AC source.

The transfer is seamless to the attached loads

ensuring the availability of continuous AC power and

safe server shutdown. Also, Redundant Switch pro-

vides user configurable settings for low voltage and

AC line distortion in order to meet the variable power

needs of your site.

The Redundant Switch can easily be installed in any

19” equipment rack, occupying just 1.75” or one U

of rack space. Alternatively, it can be mounted in the

rear or side of the rack, requiring zero U of valuable

rack space. It ships with all appropriate rack mount

hardware for two and four post racks.

Implementing Your Solution

Because its design is so flexible, there are numerous

configurations for Redundant Switch providing dif-

ferent levels of availability. Three are outlined below:

Good, Better, and Best.

Redundant Switch for Smart-UPS

APC’s Redundant Switch accessory products offer network

managers a cost effective method for increasing AC power

availability to network equipment

Redundant

Switch

AC Source “A”

Redundant

Switch

Smart-UPS

AC Source “B”

= Communications

= Power

AC Source “A”

AC Source “B”

Good:

Better:

Load

For more information about all APC products, go to www.apcc.com

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APC AP9621 Specifications Page 18

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