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Installing a DC Power Supply
To install a DC power supply, follow this procedure (see Figure 6):
Verify that there is no power flowing to the power supply from the external
power source, so that the voltage across the leads of the power cables is
0 V. Ensure that there is no chance that the cable leads might become
active during the procedure.
Verify that the power switch for the power supply (located on the circuit breaker box)
is in the OFF (O) position.
Attach an electrostatic discharge (ESD) grounding strap to your bare
wrist and connect the strap to one of the ESD points on the chassis. For more information about ESD, see the hardware guide for your routing platform.
Place one hand under the power supply and grasp a handle on the faceplate
with the other hand. Slide the power supply into the chassis until it contacts
Starting with the bottom screws, tighten (but do not overtighten) the
thumbscrew at each corner of the power supply faceplate.
- Press the switch on the corresponding circuit breaker to the ON ( | )
position. Verify that on the power supply faceplate the green LED labeled CB ON lights
steadily, the blue LED labeled OUTPUT OK blinks momentarily,
then lights steadily, and the amber LED labeled CB OFF does
Note: After powering off a power supply, wait at least 60 seconds before turning
it back on. After powering on a power supply, wait at least 60 seconds before
turning it off.
Note: If the system is completely powered off when you power on the power
supply, the Routing Engine boots as the power supply completes its startup
sequence. If the Routing Engine finishes booting and you need to power off
the system again, first issue the CLI request system halt command. For more information, see Disconnecting DC Power from
Note: After a power supply is powered on, it can take up to 60 seconds for
status indicators—such as LEDs on the power supply, show chassis commands, and messages on the craft interface LCD—to indicate
that the power supply is functioning normally. Ignore error indicators that
appear during the first 60 seconds.
Figure 6: Installing a DC Power Supply
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