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4-4
Figure 4-5
Mount the device in the rack
Installing Generic Modules
Generic modules include CF card, mini interface cards and MIM modules. For their installation
procedures, see Chapter 7 “Maintaining Hardware.”
PGND Cable Connection
Importance of PGND Cable Connection
Correct connection of the protection ground (PGND) on the device chassis is an essential safeguard
against lightning strikes and EMI. You need to correctly connect the PGND cable when installing or
using the device.
The power input end of a U200 series device is equipped with a noise filter. The neutral ground of the
power input end is directly connected to the chassis and is called PGND (also called the chassis
ground). You need to securely connect the PGND cable to the earth ground to safely lead induced
current and leakage current to the ground and reduce the EMS of the device. The PGND cable can also
protect the device against high lightning voltage induced from external network lines.
Connecting the PGND Cable
The grounding screw of a U200 series device is located on the rear chassis panel and is marked with a
grounding symbol, as shown in Figure 4-6.
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