XtendLan DVR-410AUTO User
‘s Guide
28
3.7 Alarm Input and Output Connection
There are two alarm input types for you to select: normal open (NO) and normal close (NC).
1. Alarm input
a. Alarm input mode supports grounding alarm input.
b. Alarm input supports 12V-24V voltage signal alarm input.
c. When the alarm device is connecting one DVR and one other device, please use a relay to separate
them,
2. Alarm output
The alarm output port should not be connected to high power load directly (It shall be less than
1A) to avoid high current which may result in relay damage. Please use the co contactor to realize the
connection between the alarm output port and the load.
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, 120
Ω 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
Alarm input and output interface is shown as in Figure 3-10.
Figure 3-10
Summary of Contents for DVR-410AUTO series
Page 1: ...DVR 410AUTO series User s Guide User s Guide version 02 2011...
Page 52: ...XtendLan DVR 410AUTO User s Guide 52 Figure 4 18 Figure 4 19 Figure 4 20...
Page 54: ...XtendLan DVR 410AUTO User s Guide 54 Figure 4 23...
Page 56: ...XtendLan DVR 410AUTO User s Guide 56 Figure 4 24 Figure 4 25 Figure 4 26 Figure 4 27...
Page 88: ...XtendLan DVR 410AUTO User s Guide 88 Figure 5 43...
Page 93: ...XtendLan DVR 410AUTO User s Guide 93 Figure 6 11...
