11
when there is high voltage. Low voltage will not activate the
alarm.
Note:
z
Dome alarm input message is ground mode.
z
Dome alarm input signal are two modes: normal open and
normal close.
3.2.1 System
Layout
3.2.1.1
BUS connection
Please refer to Figure 3-5 and Figure 3-6 for BUS cable connection.
Figure 3-5
Figure 3-6
Note:
Please use shielded twisted pair. The shielded layer shall connect to GND firmly; otherwise it may affect
communication or video work.
3.2.1.2
Star Connection
Please refer to Figure 3-7 for start connection information.
