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(1,6,8) alarm input (2,7) grounding (3) Alarm (5) RS485 (4) RS232
Parameter
Meaning
G
grounding (earth)
C1, NO1
Alarm output interface(constant open type)
T, R
RS232 port
A, B
485 communication interface which is connected with the recording
control equipments such as the decoder
2.7.1 Alarm input port speciication
1 channels alarm input. Alarm input type unlimited.
The earth and the com port of the alarm sensor are parallel (The alarm sensor
has an external power supply) .
The earth 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 earth of the power supply and the alarm sensor must be shared when used
in an external power supply.
2.7.2 Alarm output port speciication
1 channels alarm output. There is an external power supply when using the
external alarm equipment.
Please refer to the relevant relay parameters to avoid overloading that damages
the DVR.
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