Removing A -48-Volt Dc Power Supply - 3Com 3CB9E7 - CoreBuilder 9000 Chassis Switch Getting Started Manual

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HAPTER AINTENANCE FOR THE
Removing a –48-volt DC Power Supply
The CoreBuilder 9000 Enterprise Switch 7-slot chassis
can accommodate up to two –48-volt DC power
supplies.
To remove a –48-volt DC power supply from a 7-slot
chassis:
Set the power supply's Standby/On switch (Figure 28),
1
which is located on the side of the power supply, to
the Standby position.
–48-volt
Figure 28
To protect the power supply that you want to remove,
2
turn off the building's power source circuit breaker.
7-S C
LOT HASSIS
DC Power Supply Standby/On Switch
Standby position
On position
Standby/On
switch
Remove each wire from the DC power source
3
electrical outlet.
Remove the 8 AWG wires from DC input connector
4
on the –48-volt DC power supply.
Label the polarity of both ends of each wire
a
(Figure 29).
Figure 29 Label Each 8 AWG Gauge Wire
Loosen the three wires with a slotted-blade
b
screwdriver.
Gently pull the three wires out of the DC input
c
connector.
Place the wires aside until you are ready to connect
d
them again.
-48-volt DC
0V
(zero volt)
Protective
earth ground