64
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.
3.6.1 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
Figure 3-2
Figure 3-3
Figure 3-4
Содержание HCVR5204A Series
Страница 1: ...Dahua HDCVI Standalone DVR User s Manual V1 5 0 ...
Страница 77: ...68 Figure 3 10 Figure 3 11 Figure 3 12 Figure 3 13 Figure 3 14 485 Port 485 Port 485 Port 485 Port 485 Port ...
Страница 78: ...69 3 8 Other Interfaces There are still other interfaces on the DVR such as USB ports ...
Страница 139: ...130 Figure 4 74 Figure 4 75 ...
Страница 140: ...131 Figure 4 76 Figure 4 77 ...
Страница 145: ...136 setups please click save button system goes back to the previous menu Figure 4 81 Figure 4 82 ...
Страница 146: ...137 Figure 4 83 Figure 4 84 ...
Страница 148: ...139 Figure 4 86 Figure 4 87 ...
Страница 156: ...147 Figure 4 99 Figure 4 100 ...
Страница 217: ...208 Figure 5 61 Figure 5 62 ...
Страница 248: ...239 Please check and maintain the device regularly ...
Страница 266: ...257 ...