Allied Telesis AT-SBx31CFC960 - Manual (Page 205)

SwitchBlade x3112 Chassis Switch and AT-SBx31CFC960 Card Installation Guide
205
8. With a #2 Phillips-head screwdriver, tighten the handle locking screw
to secure the power supply to the chassis. See Figure 135 on page
195.
9. Before attaching the power wires from the power supply to the circuit
breaker in the wiring closet, check that the circuit breaker is off.
10. Connect the power wires to the circuit breaker.
11. Turn the circuit breaker on.
12. Turn the On/Off switch on the power supply to the On position. See
Figure 129 on page 189.
13. Do one of the following:
 If the chassis has two AT-SBxPWRSYS1 DC Power Supplies,
repeat this procedure to power on the second power supply.
 Otherwise, go to “Monitoring the Initialization Process” on
page 206.