Connecting The Pgnd; Connecting The Power Cord - H3C MSR 30-20 ROUTER Installation Manual

Connecting the PGND

The normal connection of the protection ground (PGND) on the router chassis is an essential safeguard
against the lightning shocks and interference. You must correctly connect the PGND when installing or
using the router.
As shown in the following figure, the router provides a protection ground (PGND) screw at the top
right-rear of the chassis. You must securely connect it to the earth ground to safely channel faradic
current and leakage electricity to the ground and have the device less susceptible to electromagnetic
interference (EMI).This PGND wire can also protect the router against the lightning caused by the
connection with the external network lines, such as E1/T1 line, ISDN/PSTN line.
The grounding screw of MSR 30 Series Router, which is marked with grounding label, is located near
the AC power socket and its switch on the rear panel of the chassis, as shown in the following figure:
Figure 3-4 Grounding terminal 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.
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.

Connecting the Power Cord

Base on power supply mode, the MSR 30 Series Routers have three models: DC, AC and PoE. You can
choose suitable ones as needed.
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