Honeywell CADVR-04D, User Manual

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Signal lightning arrester: This device is mainly used in the PC network,
communication system. The connection type is serial connection. Once
you connected the signal lightning arrestor with the signal port, it can
cut the channel of the thunderstorm to the device, and on the other
hand, it can discharge the current to the ground to guarantee the device
proper work. The signal lightning arrester has many specifications, and
widely used in many devices such as telephone, network, analog
communication, digital communication, cable TV and satellite antenna.
For all the input port, especially those from the outdoor, you need to
install the signal lightning arrester.
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Antenna feed cable lightning arrester: It is suitable for antenna system
of the transmitter or the device system to receive the wireless signal. It
uses the serial connection too.
Please note, when you select the lighting arrester, please pay attention
to the port type and the earthing reliability. In some important
environment, you need to use special shielded cable. Do not parallel
connect the thunder proof ground cable with the ground cable of the
lightning rod. Please make sure they are far enough and grounded
respectively.
2. The earthing modes
We all know the earthing is the most complicated technology in the
electromagnetism compatibility design since there is no systematic
theory or module. The earthing has many modes, but the selection
depends on the system structure and performance. The following are
some successfully experience from our past work.
One-point ground: In the following figure you can see there is a one-
point ground. This connection provides common port to allow signal to
be transmitted in many circuits. If there is no common port, the error
signal transmission occurred. In the one-point ground mode, each