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Problems in practical connection
In some circumstances user adopts a star configuration in practical connection. The
terminator resistors must be connected to the two equipment that are farthest away
from each other, such as equipment 1# and 15# in the following picture. As the star
configuration is not in conformity with the requirements of RS485 standards,
problems such as signal reflections, lower anti-interference performance arise
when the cables are long in the connection. The reliability of control signals could
be downgraded with the phenomena that your dome camera does not respond to or
just responds at intervals to the controller, or does continuous operation without
stop
In such circumstances the usage of RS485 distributor is recommended. The
distributor can change the star configuration connection to the mode of connection
stipulated in the RS485 standards. The new connection achieves reliable data
transmission.
RS485 distributor
.
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QMD Install manual D06400210010G PTZ Dome Camera
28
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