26
3.8
Alarm Input and Output Connection
Please refer to the following sheet for 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. Please make sure alarm input mode is grounding alarm input.
b. Grounding signal is needed for alarm input.
c. Alarm input needs the low level voltage signal.
d. Alarm input mode can be either NC (normal Open) or NO (Normal Close)
e. When you are connecting two NVSs or you are connecting one NVS 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 NVS, 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 NVS 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.
3.8.1 Alarm Input and Output Details
You can refer to the following sheet
X
for alarm input and output information.
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.
The 4/8-channel series product interface is shown as below. See Figure 3-1.
Figure 3-1
Please refer to the following sheet and Figure 3-1 for detailed information.
AB cable
connection
Summary of Contents for XP116VS
Page 1: ...1 4 8 16 Channel Real time D1 NVS User s Manual Version 1 0 0 XP116VS ...
Page 44: ...44 Figure 4 21 Figure 4 22 Figure 4 23 Figure 4 24 4 5 3 Video Loss ...
Page 47: ...47 Figure 4 27 Figure 4 28 Figure 4 29 Figure 4 30 4 7 Backup ...
Page 92: ...92 Figure 6 11 ...
Page 148: ...148 Samsung HA101UJ CE 1T SATA ...
