Allied Telesis AT-9000/12POE, AT-9000/28POE - page 43

Chapter 1: Overview
43
Power Connectors
The AT-9000/12POE, AT-9000/28, AT-9000/28SP, and AT-9000/52
switches have one AC power supply socket on the back panel. The
AT-9000/28POE switch has two AC power supply sockets.
AC switches are powered on or off by connecting or disconnecting the
power cords.