Power Supplies - Allied Telesis AT-8400 Series Reference Manual

Power Supplies

On the front panel of the chassis beneath the power supply cover are
two power supply slots labelled PWR A and PWR B. See Figure 6. One AC
or DC power supply comes pre-installed in the PWR A slot. The power
supply can power a fully loaded chassis with twelve line cards and the
management card.
WARNING
BEFORE
EJECTING,
LOOSEN
THUMBSCREW
Standard
Power
Supply
You can install an optional redundant power supply in the PWR B slot.
The extra power supply can prevent an interruption to your Ethernet
network should the standard power supply fail. An optional redundant
power supply operates in a standby mode. It provides power to the
chassis only if the main power supply fails or loses power.
When ordering a redundant power supply, please note the following:
An AT-8400 Series switch has either AC power sockets or DC
terminal blocks on the back panel. When purchasing a new power
supply, be sure that the new power supply you order is
appropriate for your system. You cannot install an AC power
supply in a DC chassis or a DC power unit in an AC chassis.
There may be several different models of AC and DC power
supplies. Each model is rated for a different power load. Both
power supplies in a chassis must be of the same model type. Do
not mix power supplies with different power ratings in the same
chassis.
1
Expansion
Slot
for Optional
RPS Unit
Figure 6 Power Supply Slots
AT-8400 Series Switch Reference Guide
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