26Chapter 2: Installation
Power Cords,
Grounds and Cables
PGND Wire
WARNING: The normal connection of the PGND wire is an important guard against the lightning and interference. Therefore, the user must first correctly connect the PGND wire before installing and using the device.
The power input end of the Router 5000 is connected to a noise filter. The neutral point of the noise filter is directly connected to the chassis and is called protection ground (PGND). The PGND wire must be well grounded, so as to safely conduct the faradism and leaky electricity to the earth ground, and thereby improve the capability of the whole device to guard against the electromagnetic interference. 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 the Router 5000, 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 10 Grounding screw of the router
(1) Power switch | (2) AC input | (3) Grounding terminal |
