2 600W DC-Input Power Supply Replacement Instructions
Product Overview
Product Overview
The chassis can be equipped with one 600W, DC-input power supply, which rests on the interior
chassis floor, operates on DC input, and provides DC output voltages to the system components. (See
Figure 1.) This power supply completely replaces the AC-input power supply, which is also
available for these chassis. The DC-input power supply is used where isolated DC power sources are
desirable.
The interface processor end of the power supply contains the DC-input terminal block and the
system power on/off switch, both of which are part of the power supply. (See Figure 2.) The front,
or noninterface processor end, of the chassis has a removable panel that provides access to the
DC-input power supply. Two captive slotted fasteners secure the panel to the chassis.
On the noninterface processor end of the power supply, two handles provide grip points for pulling
the power supply out of the chassis. Two Phillips screws secure the power supply to the chassis
interior. Inside the power supply, two small fans draw cooling air through the power supply interior.
The air flows in one side of the supply and out the other side, following the same direction as the
chassis cooling air.
Figure 1 Cisco 7010 with the DC-Input Power Supply (Terminal Block Cover Removed)
Note For the procedures in this publication, the Cisco 7010 and Cisco 7505 chassis are functionally
the same.
The DC-input power supply delivers DC power to the internal components through a wiring harness
that plugs into a polarized receptacle on the noninterface processor side of the backplane. An
aluminum cover shields the harness and power connection. The backplane then distributes the DC
voltages to the fan tray, arbiter, and interface processor bus connectors.
Two power cable leads connect the power supply to the site DC power source. The rocker-type on/off
switch turns the power supply on and starts the system.
The green DC OK LED indicates the status of the power supply and internal DC voltages. The DC
OK LED stays on when the power supply is on and receiving DC source power, providing +5, 12,
and +24 VDC to internal components, and all internal DC voltages are within tolerance.
DC-input
power supply
H2535
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