Allied Telesis AT-SBx81CFC960 - Manual (Page 113)

SwitchBlade x8106 Chassis Switch and AT-SBx81CFC960 Card Installation Guide
Section II: Installing the Chassis 113
6. Align and insert the AT-SBxPWRSYS1 Power Supply into the power
supply slot. Figure 52 shows the power supply installed in slot D.
Figure 52. Inserting the AT-SBxPWRSYS1 Power Supply