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D.
The 485 AB lines of DVR cannot connect with other 485 output
equipments paralleled.
E.
The voltage between the AB lines of the decoder must be less
than 5V.
4. Front equipment grounding note
Bad grounding can lead to the burnout of the chip.
5. Alarm input type unlimited
The DVR alarm output port is constant opening type.
(1) Alarm input
(2) Alarm output (3) RS-485
parameter
meaning
1-8
8 alarm inputs
C, NO
Alarm output interface(constant open type)
Grounding
A B
RS-485 to communicate with the PTZ
2.6.1 Alarm input port specification
1 channels alarm input. Alarm input type unlimited.
The grounding and the com port of the alarm sensor are parallel (The
alarm sensor is external power supply).
The grounding of the alarm and the DVR should be shared.
The NC port of the alarm sensor must be connected with the DVR alarm
input port.
The grounding of the power supply and the alarm sensor must be shared
when used in external power supply.
2.6.2 Alarm output port specification
1 channels alarm output. There is external power supply when using the
external alarm equipment.
Please refer to the relay relevant parameters to avoid the overload that
damages main machine.
Summary of Contents for B series
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