Allied Telesis AT-SBx31CFC960 - Manual (Page 176)

Chapter 9: Powering On the Chassis
176
If there are two system power supplies, you may power on either
supply first. The illustration in Figure 112 shows the AC power cord
being connected to connector D for the power supply in slot D on the
front panel.
Figure 112. Connecting the AC Power Cord for the AT-SBxPWRSYS1
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 113 on page 177.