Connecting Basics
35
Make sure the front-end device has soundly earthed
Improper grounding might 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 normally open activation output (on/off button).
NO5 C5 NC5,
There is one group of normally 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 RS-485 port.
T+ T-: output wire.
R+ R-: input wire.
Table 4-1
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.
Summary of Contents for XVR Cooper Series
Page 1: ...DIGITAL VIDEO RECORDER User s Manual V1 2 0 ZHEJIANG DAHUA VISION TECHNOLOGY CO LTD...
Page 45: ...Connecting Basics 32 Figure 4 2...
Page 97: ...Local Configurations 84 Figure 5 50...
Page 198: ...Local Configurations 185 Figure 5 153 Figure 5 154 Double click the video or click Step 7...
Page 203: ...Local Configurations 190 Figure 5 158 Figure 5 159...
Page 311: ...Glossary 298 Abbreviations Full term VGA Video Graphics Array WAN Wide Area Network...
Page 329: ...Earthing 316...
