JUNOS Internet Software Network Operations Guide: Hardware
Figure 104 shows the location of the DC power supply serial number ID label for the
T640 routing node. The serial number ID label is located on the left side of the power supply faceplate.
Figure 104: T640 Routing Node DC Power Supply Serial Number Label
Serial number ID label
SP04461A
P/N : 740-002595
S/N : MJ10276
REV: C
REV: 03
082901
CB ON
CB TRIP
OVER TEMP
DC OK INPUT 1
INPUT 0
Replacing the Power Supplies
The power supplies are hot-removable and hot-insertable. You can remove or replace a power supply without powering down the system and disrupting routing functions.
However, you must power down the power supply before removing it from the router. When one power supply is powered down, the other power supply automatically assumes the entire electrical load for the router.
NOTE: The circuit breaker box is not hot-removable or hot-pluggable. You must power down the router to remove the circuit breaker box.
Action To return a failed power supply, see “Return the Failed Component” on page 86. To replace the power supplies, see the appropriate router hardware guide.
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Replacing the Power Supplies
