g) Attach the power cable to the power receptacle on the power supply and rotate the power cable holder onto the plug
on the cable.
h) Make sure that the other end of the power cable is attached to the AC power source in one of the following ways:
• If you are using the combined power mode or the n+1 redundancy mode, you must connect the power cable to
the same power source as used by the other power supplies in the same router.
• If you are using the n+n redundancy mode, you must connect the power cable to the same power source as used
by the other power supplies in the same set of power supply slots in the chassis.
• NCS 5504: The power cables for slots 1 and 2 must be connected to one power source and the power cables
in slots 3 and 4 must be connected to another power source.
• NCS 5508: The power cables for slots 1 through 4 must be connected to one power source and the power
cables in slots 5 through 8 must be connected to another power source.
• NCS 5516: The power cables for slots 1 through 5 must be connected to one power source and the power
cables in slots 6 through 10 must be connected to another power source.
i) Verify that the OK LED turns on and eventually becomes green.
Replace DC Power Supply
Before you begin
• The power source must be installed within reach of the power cables.
• The power source must meet the power specifications required by the switch.
• There are one or two power sources available. If using n+n redundancy, there must be two power sources
available. Otherwise, only one power source is required.
• Prepare an antistatic surface or antistatic bag for the power supply that you are removing.
Step 1 Open the packaging for the new DC power supply and inspect the module for damage.
If the module is damaged, contact the Technical Assistance Center (TAC).
Step 2 If you are installing the module in an empty slot, remove the blank filler plate that is already in that slot by unscrewing
its captive screw and pulling it out of the slot. Go to Step 4.
Step 3 If you are replacing a power supply that is currently in the chassis, remove the existing module from the chassis by
following these steps:
a) Turn off the power to the power supply that you are replacing as follows:
1. Shut off the power supply by setting its power switch to 0.
2. If the power supply is connected to a DC circuit, shut off the circuit at the circuit breaker.
3. Verify that the OK LED has turned off (indicates that there is no power going to the power supply).
The FAULT LED might be on and amber colored to indicate that the power source connection has
been broken.
Note
Hardware Installation Guide for Cisco NCS 5500 Series Modular Routers
120
Replace Chassis Components
Replace DC Power Supply
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