4
Figure 1-3
1.8
Alarm Input and Output Connection
There are two alarm input types for you to select: normal open (NO) and normal close (NC).
1.8.1 Alarm Input and Output Details
Figure 1-4
You can refer to the following sheet for alarm input and output information.
1
,
2
,
3
,
4
,
ALARM 1 to ALARM 4. The alarm becomes active in low voltage.
NO1 C1
,
NO2 C2
There are two groups of normal open activation output (on/off
button)
Earth cable.
485 A/B
485 communication port. They are used to control devices such as
PTZ. Please parallel connect 120T
Ω
between A/B cables if there are
too many PTZ decoders.
AB cable
connection
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