Allied Telesis AT-SBx31CFC960 - Manual (Page 25)

SwitchBlade x3112 Chassis Switch and AT-SBx31CFC960 Card Installation Guide
25
Power Supply Slots
The chassis has four power supply slots, labelled A to D, across the top of
the front of the chassis.
Figure 8. Power Supply Slots
The two right hand slots are for the AT-SBxPWRSYS1 Power Supply,
which supplies power to the Ethernet line cards, controller cards, and fan
module. The only chassis component not powered by the module is the
PoE feature on the twisted pair ports on the AT-SBx31GP24 PoE Line
Card.
A single AT-SBxPWRSYS1 Power Supply can support a fully populated
chassis. However, you may install two power supplies to add power
redundancy to the unit.
There are AC and DC versions of the AT-SBxPWRSYS1 Power Supply.
Refer to Figure 2 on page 20 for illustrations of the modules.
The two left hand slots are for the AT-SBxPWRPOE1 Power Supply. This
unit provides PoE for the ports on the AT-SBx31GP24 Line Card. (The line
card also needs the AT-SBxPWRSYS1 Power Supply to operate its
switching functions.) You may install two AT-SBxPWRPOE1 Power
Supplies in the chassis to provide power redundancy or increase the
amount of PoE power.
Slot A
Power Supply
AT-SBxPWRPOE1
Slot B
Power Supply
AT-SBxPWRPOE1
Slot C
Power Supply
AT-SBxPWRSYS1
Slot D
Power Supply
AT-SBxPWRSYS1