Allied Telesis SwitchBlade x8112 - Manual (Page 57)

SwitchBlade x8112 Chassis Switch Installation Guide
57
AT-SBxPWRSYS1 DC Power Supply
The AT-SBxPWRSYS1 DC Power Supply, shown in Figure 25, is a DC
version of the power supply unit for the chassis and may be used in place
of the AT-SBxPWRSYS1 AC Power Supply in network environments that
have DC wiring. Like the AC power supply, the module supplies power to
all the hardware components in the chassis, except for the PoE feature on
the ports on the AT-SBx81GP24 Line Cards.
Figure 25. AT-SBxPWRSYS1 DC Power Supply
A single AT-SBxPWRSYS1 Power Supply can support a fully populated
chassis, with any combination of Ethernet line cards. The chassis can
have two AT-SBxPWRSYS1 Power Supplies for power redundancy.
Power supply modules are not included with the chassis and must be
purchased separately.
The AT-SBxPWRSYS1 Power Supplies are installed in the two right hand
slots, labeled C and D, at the top of the front of the chassis. If you are
installing just one power supply, you may install it in either slot. The
locations of the slots are shown in Figure 10 on page 25.
The AT-SBxPWRSYS1 Power Supply is hot swappable. If a chassis has
two power supplies and one of them fails, you may replace the failed unit
without having to power off the chassis.
Note
The AT-SBxPWRSYS1 DC Power Supply is not compatible with the
AT-SBxPWRSYS1 AC and AT-SBxPWRPOE1 AC Power Supplies.
Consequently, the chassis should not contain 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.