Cisco PEM-20A-AC/2

The Cisco PEM-20A-AC/2 is a power entry module (PEM) designed for Cisco Catalyst 6500 Series switches. It is used to provide power to the switch and connect it to an AC power source. The PEM-20A-AC/2 is a redundant power supply module that supports two AC power inputs for increased reliability and power redundancy. It is hot-swappable, meaning it can be replaced or added without interrupting the operation of the switch.