1080P SDI PTZ Camera User Manual
19
faraway. At this time, the dome will be uncontrollable, or self-running, etc.
Figure A-4
Star Shape Connection
For such case, the best way is adding a RS485 distributor. This product can effectively change the
star-shape connection to which satisfies the requirement of RS485 industry standard, in order to
avoid those problems and improve the communication reliability. Show as figure 5.
Figure A-5
RS485 Distributor
Troubleshooting of RS485 communication
Problem
Possible Reasons
To Solve the Problem
The speed
dome does
the
self-test
action but
cannot be
controlled
remotely.
1. The address or baudrate of the
speed dome does not match with
those of remote control device.
1. Adjust the address and baudrate of
the remote control device to match
with those of the speed dome.
2. The wire RS485+ connects to
the interface RS485- and wire
RS485- connects to the interface
RS485+.
2. Connect the wire RS485+ to the
interface RS485+ and wire RS485- to
the interface RS485-.
3. The RS485 wire is
disconnected.
3. Reconnect the RS485 wire tightly.
4. RS485 wire is broken.
4. Change a RS485 wire.
6#
主控
设备
1#
32#
15#
120Ω
120Ω
120Ω
1#
2#
16#
A
+
B
-
485
分配器
Controller
Device
RS485 Distributor
