Allied Telesis AT-SBx31CFC960 - Manual (Page 189)

SwitchBlade x3112 Chassis Switch and AT-SBx31CFC960 Card Installation Guide
189
Figure 128. Attaching the Power Wires to the Power Terminal Lugs
3. Verify that the On/Off switch on the AT-SBxPWRSYS1 DC Power
Supply is in the Off position. Refer to Figure 129.
Figure 129. On/Off Switch On the AT-SBxPWRSYS1 DC Power Supply
4. Use a #1 Phillips-head screwdriver to loosen the two screws on the
plastic cover over the positive and negative terminals on the power
supply and slide the cover to the right, as shown in Figure 130 on page
190. You may need to lift the locking handle slightly to access the
bottom screw.