30
C
HAPTER
3: I
NSTALLATION
Connecting the PGND
w
WARNING:
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.
n
No protection grounding wire is delivered together with the MSR 30-11.
The grounding screw of H3C 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 14
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.
w
WARNING:
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.
Power Input and PGND
Table 20
Power input and PGND of the H3C MSR series routers
Item Description
Power input
AC-powered: provide 100 VAC to 240 VAC input socket
DC-powered: provide -60 VDC to -48 VDC input socket
PGND
Ground terminal available: connected to the earth ground
with ground cable
