WatchNet PNT, Hardware Manual

Page: 23 / 25

4.3.1
Introducing Alarm Port
The alarm input ports are dependent on the model you purchased.
Figure 4-2
Table 4-1
Icon Description
1
，
2
，
3
，
4
，
5
，
6
，
7
，
8
，
9
，
10
，
11
，
12
，
13 ， 14 ， 15 ， 16
ALARM 1 to ALARM 16. The alarm becomes active in low voltage.
NO1 C1, NO2 C2,
NO3 C3, NO4 C4
There are four groups of normally open activation output (on/off button).
NO5 C5 NC5, There is one group of normally open activation output (on/off button).
Power output control
for alarm (CTRL
12V) Controls the 6 th channel power output for alarm. Electric current: 500mA.
⚫
When there is an alarm output, close the power output.
⚫
When the alarm is cancelled, open the power output.
+12V
Rated power supply.
Electric current: 500mA.
Ground cable.
485 A/B
485 communication port. They are used to control devices such as
decoder. 120Ω should be parallel connected between A, B lines if there
are too many PTZ decoders.
T+,T-,R+,R-
Four-wire full-duplex RS-485 port.
T+ T-: output wire.
R+ R-: input wire.
4.3.2
Alarm Input
Refer to the following figure for more information.
⚫
Grounding alarm inputs which includes NO (Normally Open) and NC (Normally Closed)
type.
⚫
Parallel connect COM end and GND end of the alarm detector (Provide external power to
the alarm detector).
⚫
Parallel connect the Ground of the DVR and the ground of the alarm detector.
⚫
Connect the NC port of the alarm sensor to the DVR alarm input (ALARM).
⚫
Use the same ground with that of DVR if you use external power to the alarm device.