APC AP4421 - RACK-mount automatic transfer switch | 230V | 10A | C14 IN | (12) C13 OUT, Load capacity: 2000VA. Provides redundant rack mount power to single-corded equipment. Offers simultaneous remote management access through Telnet and SSH, Monitors the aggregate current draw per power distribution unit. LCD Display which displays system parameters and alarms.
APC AP4423 - Rack-mount 1U ATS | 230V | 16A | C20 in | (8) C13 (1) C19 out. Provides redundant AC power to single-corded equipment. Two AC lines power the unit and if the primary AC power fails, the unit will automatically switch to the alternative power source.