Cisco 5428 - SN Router, Руководство по установке

Страница: 73 / 106

B-3
Cisco AS5400 Universal Gateway Chassis Installation Guide
OL-2847-02 0A
Appendix B Replacing the Power Supply
Removing the Chassis Cover
Removing the Chassis Cover
You must open the chassis to gain access to its interior components.
To remove the chassis cover, follow these steps:
Step 1
Turn the power switch OFF and disconnect site power. (Note that the power switch is part of the power
supply.)
Note
If you are using a DC-powered unit, refer to Figure B-1 and complete Step a
through Step d.
Warning Before performing any of the following procedures, ensure that power is removed from
the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel
board that services the DC circuit, switch the circuit breaker to the OFF position, and
tape the switch handle of the circuit breaker in the OFF position. To see translations of
the warnings that appear in this publication, refer to the
Regulatory Compliance and
Safety Information document that accompanied this device.
Figure B-1 DC Power Supply Connections
a. Loosen the six locking screws for the negative, return, and ground connectors on the DC power
supply terminal blocks.
b.
Remove the -48 VDC wires from the terminal block negative connectors (-).
c. Remove the 48 VDC wires from the terminal block positive connectors (+).
d.
Remove the safety ground (green wires) from the terminal block ground connectors.
On/off
switch
LEDs
31628
Terminal
block
Mounting screw Mounting screw
Mounting
screw
IN OK
DC OK
OTF
IN OK
DC OK
OTF
LEDs
Terminal
block
Strain-relief
clamps
Strain-relief
clamps