Allied Telesis AT-SBx81CFC960 - Manual (Page 204)

Chapter 9: Powering On the Chassis
204 Section II: Installing the Chassis
7. With a #2 Phillips-head screwdriver, tighten the handle locking screw
to secure the power supply to the chassis. See Figure 137 on page
194.
8. Before attaching the power wires from the power supply to the circuit
breaker in the wiring closet, check that the circuit breaker is off.
9. Connect the power wires to the circuit breaker.
10. Turn the circuit breaker on.
11. Turn the On/Off switch on the power supply to the On position. See
Figure 131 on page 188.
12. 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 205.