Allied Telesis AT-SBx81CFC960 - Manual (Page 172)

Chapter 9: Powering On the Chassis
172 Section II: Installing the Chassis
If there are two system power supplies, you may power on either
supply first. In the illustration in Figure 110 an AC power cord is
connected to connector D for the system power supply in slot D on the
front panel.
Figure 110. Connecting the AC Power Cord for the AT-SBxPWRSYS1 AC
Power Supply
3. Use the twist tie included with the power supply to secure the cord to
an anchor on the chassis to protect it from being accidentally pulled
out, as shown in Figure 111 on page 173.