3Com Router 3016, Installation Manual

Page: 24 / 72

24 C
HAPTER
3: I
NSTALLING THE
R
OUTER
Figure 2 Hanging the Router on a Vertical Surface
Installing the Router
on a Workbench
To install the router on a workbench, take the following precautions:
■
Make sure that the workbench is smooth and stable.
■
Leave a heat-dissipation clearance of 10cm (4in) around the router.
■
Do not put heavy things on the router.
Connecting the
Protection Ground
Wire
Properly connect the protection ground (PGND) wire before connecting other
cables. Shorten the ground wire as much as possible to avoid the router and the
peer device being damaged during lightning.
The AC input of the router is connected to an AC noise filter whose neutral point
is connected to the chassis directly, that is PGND (protection ground). The chassis
must be grounded properly, to improve the router’s ability to resist electromagnetic
interference. The PGND also provides protection for the external network, to
ensure that the PGND wire lets out the lightning current.
The grounding point of the chassis is located on the rear panel and is labeled with
a grounding label. The grounding resistance should not be greater than 5 ohm.
Connect this point to the ground using a grounding wire.
Connecting the Power
Cable
External AC power supplies are provided for Router 3000 series routers. The
power supplies have the following specifications:
■
Input: 100 to 240VAC, 50/60Hz, 0.5 to 1 A
■
Output: 12VDC, 4A
Connect the power supply to a 3-core outlet with a neutral point. The neutral
point of the outlet should be grounded reliably.
To connect the power supply:
1 Turn off the power to the router.
2 Connect the output end of the power supply to the power socket on the rear
panel of the router.
3 Connect the input end of the power supply to the AC power outlet.
4 Turn on the power switch on the router.
5 Confirm that the router has power by checking whether the POWER LED is on.
Pan-head screw