Connecting Basics
23
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.
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 6
th
alarm output channel. 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.
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).
Summary of Contents for Smart 1U
Page 1: ...DIGITAL VIDEO RECORDER User s Manual V1 0 0...
Page 30: ...Connecting Basics 20...
Page 80: ...Local Configurations 70 No Icon Description...
Page 181: ...Local Configurations 171 Select the Enable check boxes to enable IoT function See Figure 5 152...
Page 234: ...Local Configurations 224...
Page 280: ...Glossary 270 Abbreviations Full term VGA Video Graphics Array WAN Wide Area Network...
Page 298: ...Earthing 288...
