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4 Cable Connection
The speed dome combination cable includes video cable connection port, RS485 connection port, alarm
input and output port. Please refer to the label for detailed information.
Slight difference may be found in the port amount since some functions are optional.
Name
A
485
B
GND
VIDEO
OUT
AC24V
EARTH
Relay in/out interfaces is shown below:
Name
Alarm out：1-2
Alarm out_com：
1-2
Alarm in：1-7
GND
4.1 System Layout
4.1.1 System Connection
4.1.1.1 BUS connection
Please refer to Figure 4-1 for system connection information.
Function
485-A. It is to control dome built-in PTZ.
485-B. It is to control dome built-in PTZ.
Ground.
Video output port.
24V power port. Connect to the power cable.
Ground port.
Function
a)
Two alarm output channels. When there is an alarm
from current channel, system activates relay or not.
b)
Alarm output relay default setup is NO. You can use
the jump-cap near the power board relay to set.
c)
NO：Normal open alarm output.
d)
NC：Normal close alarm output.
Alarm input ground end.
e)
Seven 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 scan.
f)
When the activation mode is NO (normal open), dome
alarms when there is low voltage. High voltage will not
activate the alarm.
g)
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.
Alarm input ground end.
22
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