41
3.
How to connect PTZ decoder
a. Ensure the decoder has the same grounding with DVR, otherwise you may not
control the PTZ. Shielded twisted wire is recommended and the shielded layer is used
to connect to the grounding.
b. Avoid high voltage. Ensure proper wiring and some thunder protection measures.
c.
For too long signal wires, 120Ω should be parallel connected between A, B lines on
the far end to reduce reflection and guarantee the signal quality.
d.
“485 A, B” of DVR cannot parallel connect with “485 port” of other device.
e. The voltage between of A, B lines of the decoder should be less than 5v.
4.
Please make sure the front-end device has soundly earthed.
Improper grounding may result in chip damage.
3.7.1 Alarm Input and Output Details
Important
Please refer to the specifications for the alarm input and output channel amount.
Do not merely count the alarm input and out channel amount according to the ports
on the rear panel.
Figure 3-1
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.
Summary of Contents for HCVR8204A-S3
Page 1: ...Dahua HDCVI Standalone DVR User s Manual Dahua HDCVI Standalone DVR User s Manual V1 3 1 ...
Page 30: ...20 Name Parameters XVR8808S XVR8816S Installation Mode Desktop rack installation ...
Page 77: ...67 Figure 4 24 Figure 4 25 ...
Page 184: ...174 Figure 4 147 Figure 4 148 ...
Page 185: ...175 Figure 4 149 Figure 4 150 ...
Page 213: ...203 Figure 4 177 Figure 4 178 ...
Page 220: ...210 Figure 4 186 Figure 4 187 ...
Page 221: ...211 Figure 4 188 Figure 4 189 ...
Page 227: ...217 Figure 4 194 Figure 4 195 ...
Page 240: ...230 Figure 4 208 Figure 4 209 4 16 2 Channel Name ...
Page 246: ...236 Figure 4 215 Figure 4 216 ...
Page 324: ...314 Figure 5 73 Figure 5 74 ...
Page 387: ...377 Figure 5 155 Note For admin you can change the email information See Figure 5 156 ...
Page 440: ...430 ...
Page 446: ...436 Email overseas dahuatech com Website www dahuasecurity com ...