3Com 2226 PWR User Guide - Page 17

Placing Units On Top of Each Other, Supplying Power to the Switch

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Supplying Power to the Switch 17 Figure 2 Inserting the Screws 4 Repeat the two previous steps for the other side of the unit. 5 Insert the unit into the 19-inch rack and secure with suitable screws (not provided). Ensure that the ventilation holes are not obstructed. 6 Reconnect the network cables. Placing Units On Top of Each Other If the Switch units are free-standing, up to four units can be placed one on top of the other. If you are mixing a variety of Baseline and SuperStack units, the smaller units must be positioned at the top. If you are placing Switch units one on top of the other, you must use the self-adhesive rubber pads supplied. Apply the pads to the underside of each Switch, sticking one in the marked area at each corner. Place the Switch units on top of each other, ensuring that the pads of the upper unit line up with the recesses of the lower unit. Supplying Power to the Switch Power problems can be the cause of serious failures and downtime in your network. Ensure that the power input to your system is clean and free from sags and surges to avoid unforeseen network outages. 3Com recommends that you install power conditioning, especially in areas prone to black outs, power dips and electrical storms. The unit is intended to be grounded. Ensure it is connected to earth ground during normal use. Installing proper grounding helps to avoid damage from lightning and power surges. Before powering on the Switch, verify that network cables and the power cable are securely connected. CAUTION: The Switch has no ON/OFF switch; the only method of connecting or disconnecting main power is by connecting or disconnecting the power cord. To power on the Switch: 1 Plug the power cord into the power socket on the rear panel of the Switch. Refer to "(9) Power Supply" on page 12 for more information. 2 Plug the other end of the power cord into a power outlet.

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Supplying Power to the Switch
17
Figure 2
Inserting the Screws
4
Repeat the two previous steps for the other side of
the unit.
5
Insert the unit into the 19-inch rack and secure with
suitable screws (not provided). Ensure that the venti-
lation holes are not obstructed.
6
Reconnect the network cables.
Placing Units On Top of Each Other
If the Switch units are free-standing, up to four units
can be placed one on top of the other. If you are
mixing a variety of Baseline and SuperStack units, the
smaller units must be positioned at the top.
If you are placing Switch units one on top of the
other, you must use the self-adhesive rubber pads
supplied. Apply the pads to the underside of each
Switch, sticking one in the marked area at each cor-
ner. Place the Switch units on top of each other,
ensuring that the pads of the upper unit line up with
the recesses of the lower unit.
Supplying Power to the Switch
Power problems can be the cause of serious failures
and downtime in your network. Ensure that the
power input to your system is clean and free from
sags and surges to avoid unforeseen network out-
ages. 3Com recommends that you install power con-
ditioning, especially in areas prone to black outs,
power dips and electrical storms.
The unit is intended to be grounded. Ensure it is con-
nected to earth ground during normal use. Installing
proper grounding helps to avoid damage from light-
ning and power surges.
Before powering on the Switch, verify that network
cables and the power cable are securely connected.
CAUTION:
The Switch has no ON/OFF switch; the
only method of connecting or disconnecting main
power is by connecting or disconnecting the power
cord.
To power on the Switch:
1
Plug the power cord into the power socket on the
rear panel of the Switch. Refer to
“
(9) Power Supply
”
on
page 12
for more information.
2
Plug the other end of the power cord into a power
outlet.