22
4
Cable Connection
4.1 Cable Connection
The speed dome combination cable includes video cable connection port, RS485 connection port, alarm
input and output port, and power cable connection port. Please refer to the label for detailed information.
Slight difference may be found in the port amount since some functions are optional.
Name
Function
485
A
485-A. It is to control dome built-in PTZ.
B
485-B. It is to control dome built-in PTZ.
AC24V
24V power port. Connect to the power cable.
EARTH
Ground port.
HD AVS
BNC port. HD AVS standard signal to control the speed dome.
Audio
IN
Input audio
GND
Audio GND port.
Sheet 4-1
Relay in/out interfaces is shown below:
Name
Function
Alarm out
：
1
One alarm output channel. When there is an alarm from current
channel, system activates relay or not.
Alarm output relay default setup is NO. You can use the jump-
cap near the power board relay to set.
NO
：
Normal open alarm output.
NC
：
Normal close alarm output.
Alarm out_com
：
1
Alarm input ground end.
Alarm in
：
1-2
Two alarm input channels. It is to receive relay signal from the
external alarm source. You can go to dome menu to activate
specified preset or patter.
When the activation mode is NO (normal open), dome alarms
when there is low voltage. High voltage will not activate the
alarm.
When the activation mode is NC (normal close), dome alarms
when there is high voltage. Low voltage will not activate the
alarm.
Note:
Dome alarm input message is ground mode.
Dome alarm input signal are two modes: normal open and
normal close.
GND
Alarm input ground end.
