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User’s manual
47
7.3 Connect two or more domes to console
As the RS-485 supports multi-drop topology, two or more domes can be connected
to one controller in a system. For such application, the following rules must be kept:
All the speed domes should be connected to host in daisy chain pattern. Star
type of configuration should be prohibited to avoid system instability.
Each dome must have unique ID so communication data can be delivered to
the correct target device.
Impedance-match setup is also required to keep communication quality.
Connect the other end of the cable to a phone jack box with extension outlet of
two. Installer must
pay attention to the pins
of the extension box to ensure the
connection is correct.
To connect more cameras, copy the same procedure on
above. You may continue extending the quantity of camera
to its maximum number of 128 per network, if the control
device has the capability of addressing that many ID..
The extension wire and box are available in general electronic and phone shops.
Extension box
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