14
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CONNECTIONS
PRECAUTIONS
※
The following connections should be made by qualified service personnel or system installers in
accordance with all local codes.
Note:
When powered up, the camera performs a self-check for about 2 minutes (including one panning, tilting, zooming
and focusing operation). During the period, control operations are not executed.
6. TROUBLESHOTING
Trouble Possible
Causes
Solution
No action, no video after
powered up
Power supply is not well connected
Replace
Engineering cable failure
Eliminate
The power supply is not well connected
Correct
Self-check isn’t normal, but
image is normal and obstacle
found in operation.
Machine failure
Repair
The camera is declining
Put straight
Voltage is low
Change power and place it near the
camera
The distance between AC24V power
supply to dome camera must be less
50 meters
Self-check is normal but no
image
The contact of video cables is incorrect
Correct
The contact of video cables is loose
Eliminate
Camera is damaged
Replace
Self-check is normal but it is
uncontrollable
The connection of control signal is incorrect
Correct
Camera number is not set correctly.
Reinstall
Protocol setting is incorrect
Correct
RS485 cable A+&B- connection is not correct
Correct
RS485 cable is too long
The maximum cable for RS485
communication is 1.2km
RS485 signal network is star configuration
Star distributor is used at junction of
connection
Instable image
The contact of video cables is loose
Eliminate
Voltage is low
Replace
The camera is uncontrollable
and running unceasingly
Dropout occurs due to low voltage
Check ID address settings
Self-check is abnormal
Power up again
The operation of mainframe is not correct
Power up again
RS485 bus line isn’t equipped with matched
resistance, or the resistance is not matched.
Correct
Abnormal video
Extremely bright video
No termination or high resistance
Red L AC24V
Black N AC24V
Video Output
RS485 Signal
Orange RS485+
Yellow RS485-
