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Power Cords, Grounds and Cables 27
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.
Power Cord The user is provided with two types of the Router 5000: AC-powered and
DC-powered. Except for the input power, these two types have exactly
the same features and functions.
Power input and
PGND
AC Power Cord AC power supply
Rated voltage range: 100 to 240VAC, 50 Hz to 60 Hz.
The following figure illustrates the partial external appearance of the
power socket for a AC-powered router:
Table 10 Power input and PGND
Item Description
Power input Input voltage 12VDC, connected through the external power
module to the 110/220V site power
PGND Connected to the earth ground with ground cable
Table 11 Power input and PGND of other models
Item Description
Power input AC model: 100 to 240VAC power input socket
DC model: -48 to -60VDC power input socket
PGND Connected to the earth ground with ground cable