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The NVR alarm output port is constant opening type.
eight external alarm interface
(1) alarm input 1,2,3,4
(2) ground (3) RS232 (4) RS485 (5) alarm input 5,6,7,8
(6) ground (7) alarm output
sixteen external alarm interface
①⑥⑧
alarm input
②⑦
ground
③
alarm output
⑤
RS485
④
RS232
Parameter
meaning
G
grounding
R,T
RS232 port
A,B
485communciate interface which is connected with the
recording control equipments such as the decoder