Allied Telesis X8112 - page 115

SwitchBlade x8112 Chassis Switch Installation Guide
115
Figure 70. Tightening the Thumb Screws on the AT-SBx81CFC400 Card
10. Tighten the screws with a # 2 Phillips-head screwdriver to secure the
controller card to the chassis.
Allied Telesis recommends tightening the screws to 5 inch-lbs.
11. if you have a second AT-SBx81CFC400 Controller Fabric Card, repeat
this procedure to install it in the chassis.
12. Go to “Installing the Ethernet Line Cards” on page116.