Connecting The Power Cord; Power Input And - 3Com 5000 Series Installation Manual

3Com Router 5000 Family
Installation Guide
(1)
(1) Power switch
(3) Grounding terminal
Figure 4-3 Grounding screw of the router
Use a PGND wire to connect the screw to the earth ground, and the grounding
resistance should not be greater than 5-ohm. Likewise, if the router is installed in a
19-inch standard rack, this rack is required to be grounded too.
Caution:
When the router is in normal operation, it is required to be well grounded. Otherwise,
the router cannot reliably avoid lightning, which may damage the router itself and even
the peer device.

4.5 Connecting the power cord

The user is provided with two types of 3Com 5000 Routers: AC-powered and
DC-powered. Except for the input power, these two types have exactly the same
features and functions.
4.5.1 Power input and PGND
Table 4-1 Power input and PGND
Item
Power input
PGND
(2) (3)
Input voltage 12VDC, connected through the external power
module to the 110/220V site power
Connected to the earth ground with ground cable
3Com Corporation
4-4
Chapter 4 Installation of the Router
(2) AC input
Description