Allied Telesis AT-SBx81CFC960 - Manual (Page 123)

SwitchBlade x8112 Chassis Switch and AT-SBx81CFC960 Card Installation Guide
Section II: Installing the Chassis 123
Figure 61. Raising Handle on the AT-SBxPWRSYS1 DC Power Supply
7. Align and insert the AT-SBxPWRSYS1 Module into slot C or D.
Figure 62 shows the power supply installed in slot D.
Caution
The AT-SBxPWRSYS1 DC System Power Supply will not work in
slot A or B.
Figure 62. Inserting the AT-SBxPWRSYS1 DC System Power Supply