ProVisual PTZ-501C – PTZ Keyboard Controller Manual
www.provisualusa.com
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P a g e
when the cables are long in the connection. The reliability of control signals are decreased with the phenomena that the dome dose not
responds to or just responds at intervals to the controller, or dose continuous operation without stop.
In such circumstances the factory will recommends the usage of Rs485 distributor. The distributor can change the star configuration
connection to the mode of connection stipulated in the RS485standards. The new connection achieves reliable data transmission (refer to
picture 4-1.4
Figure 4-1.3
Figure 4-1.4
120
Ω
120
Ω
2#
B-
120
Ω
120
Ω
120
Ω
A+
1#
3#
32#
1#
6#
Master equipment
15#
