Replacing an AC or DC Power Tray
This section describes how to replace an AC or DC power tray in the FCC power enclosure. Although there
are differences between AC and DC power trays, they are reinstalled by using the same procedures described
below. Once they are installed into an FCC that is properly grounded, external grounding to the power tray
is not needed.
As a requirement to receive Cisco support, all four power trays must be installed in the FCC.
Note
Because of the weight of the power tray, 20 lb (9 kg), and the height at which the power tray is installed
in the FCC, you should be especially careful while removing and carrying the power tray. To prevent
injury, avoid sudden twists or lateral moves.
Caution
Prerequisites
Before you reinstall an AC or DC power tray, do the following:
•
Remove the exhaust air deflector from the rear of the Cisco NCS 6000 FCC.
•
Power off the power shelf that houses the power tray you are about to install by using the I/O power
switch on the respective PCM.
•
Power off the AC PMs in the tray that you want to disconnect.
•
Remove the AC or DC input cables from the rear of the power enclosure.
•
Remove the top grilles from both the front and rear sides of the FCC, if installed.
•
Ensure the power tray you are about to remove is empty. Do not install a power tray into the FCC with
PMs already installed in the power tray.
The I/O switch on each power shelf only disables the output of the PMs in that shelf. Make sure that the
other power trays provide redundant power, The inputs to the PMs remain hot, as well as the system
’
s
internal busbar (due to the other power shelf).
Caution
Required Tools and Equipment
•
6-inch, Number-2 Phillips screwdriver
•
Torque screwdriver with Number-2 Phillips-head and torque rated up to 55 in-lb (6.2 N-m)
•
AC or DC power tray
◦
AC power tray (Cisco PID NCS-AC-PWRTRAY=)
◦
DC power tray (Cisco PID NCS-DC-PWRTRAY=)
Cisco Network Convergence System 6000 Fabric Card Chassis Hardware Installation Guide
99
Removing and Replacing Chassis Components
Replacing an AC or DC Power Tray
