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Chapter 1: Overview
26
The two right hand slots are for the AT-SBxPWRSYS1 Power Supply,
which supplies power to the Ethernet line cards, control modules, and fan
module. The only chassis component not powered by the module is the
PoE feature on the twisted pair ports of the AT-SBx31GP24 PoE Line
Card.
There are AC and DC versions of the AT-SBxPWRSYS1 Power Supply.
Refer to Figure 4 on page 21 for illustrations of the modules.
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.
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. (It
should be noted that 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 increase the amount of
available PoE power.
Note
The AT-SBxPWRSYS1 DC Power Supply is not compatible with the
AT-SBxPWRSYS1 AC or AT-SBxPWRPOE1 AC Power Supply.
You should not operate the chassis with both AC and DC power
supplies. You may, however, operate the chassis for a short period
of time with AC and DC power supplies if you are converting it from
one type of power supply to another, such as from AC to DC. This
allows you to transition the chassis without having to power it off.