Amcrest AMDVTENL8, Руководство пользователя

Страница: 22 / 199

22
The alarm output port should not be connected to a high-power load directly (The power load should be less
than 1 amp) to avoid high current which may result in relay damage.
3.3.4.3 Connecting a PTZ Decoder
a. Ensure that the decoder has the same grounding with the DVR, otherwise you may not be able to
control the PTZ. Shielded twisted wire is recommended and the shielded layer is used to connect to
the ground.
b. Avoid high voltage. Ensure proper wiring and take some thunder protection measures.
c. For signal wires that are too long, 120Ω should be connected in parallel 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 another device.
e. The voltage between the A,B lines of the decoder should be less than 5v.
3.3.4.4 Alarm Input/Output Details
Important!
Please refer to the specifications for the alarm input and output channel amount. Do not merely count the
alarm input and output channel amount according to the ports on the rear panel.
The following interface is based on the 8-channel advanced 1080P (V2) mini 1U Series.
1
，
2
，
3
，
4
，
5
，
6
，
7
，
8
，
9
，
10
，
11
，
12
，
13
，
14
，
15
，
16
ALARM 1 to ALARM 16. The alarms become active in low voltage.
NO1 C1
，
NO2 C2
，
NO3 C3
，
Three normal open groups (on/off signal)
Earth cable.
3.3.4.5 Alarm Input Ports
•
Grounding alarm inputs. (Normal Open or Normal Close type)
•
Please parallel connect COM end and GND end of the alarm detector (Provide external power to the
alarm detector).