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Connecting Basics
33
Please make sure the front-end device has soundly earthed
Improper grounding may result in chip damage.
4.3.1 Introducing Alarm Port
The alarm input ports are dependent on the model you purchased.
Figure 4-3
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 normal open activation output (on/off button).
NO5 C5 NC5,
There is one group of normal open activation output (on/off button).
CTRL 12V
Control power output of the alarm output channel 6. Voltage current:
500mA.
When there is an alarm output, close the power output.
When the alarm is cancelled, open the power output.
+12V
Rated current.
Voltage 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 RS485 port.
T+ T-: output wire.
R+ R-: input wire.
Table 4-1
4.3.2 Alarm Input
Please refer to the following figure for more information.
Grounding alarm inputs which includes Normal open and Normal close type.
Please parallel connect COM end and GND end of the alarm detector (Provide external
power to the alarm detector).
Please parallel connect the Ground of the DVR and the ground of the alarm detector.
Please connect the NC port of the alarm sensor to the DVR alarm input(ALARM)
Summary of Contents for DH-5208AN-4KL-X-8
Page 42: ...Connecting Basics 30 Figure 4 2...
Page 94: ...Local Configurations 82 Figure 5 50...
Page 194: ...Local Configurations 182 Figure 5 153 Figure 5 154 Double click the video or click Step 7...
Page 199: ...Local Configurations 187 Figure 5 158 Figure 5 159...
Page 307: ...Glossary 295 Abbreviations Full term VGA Video Graphics Array WAN Wide Area Network...
Page 325: ...Earthing 313...