3Com 3C16895, Руководство по установке

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38 C
HAPTER
2: I
NSTALLING
T
HE
S
WITCH
7750
Connecting the
Ground Wire
To connect the ground wire:
1 Wear an antistatic wrist strap.
2 Remove the screw from the grounding hole in the switch chassis.
3 Set the ground wire connector around the grounding screw.
4 Fasten the grounding screw in the hole on the chassis.
5 Connect the other end of the ground wire to the grounding bar of the switch.
If you install the switch in a cabinet, 3Com recommends that the ground wire of
the switch be connected to the grounding bar of the cabinet.
WARNING: The resistance between switch chassis and the ground should be less
than 1 ohm.
Connecting and
Configuring Power
The Switch 7750 requires power connection from the AC power source and from
the PoE power rack.
Connecting AC Power
Cords
To connect AC power cords:
1 Power off all the related parts of the switch before connecting the AC power cord
2 Plug the power cords into the sockets in the switch and attach the retention clips
to the power cord plugs.
3 Plug the other end of the cords into a socket strip with surge protector. Connect
the strip to the power source in the room.
Figure 28 illustrates the power cord connection.
Figure 28 Power Cord Connection
1 AC power sockets
2 Retention clips
3 Grounding screw
WARNING: For surge protection, the power should be channelled through an
external protection device into the Switch 7750.