15
the external alarm
device.
NO
C
Alarm output port
Alarm output port. To
output alarm signal to
the alarm device.
z
NO: Normal open
alarm output end.
z
C: Alarm output
public end.
G
GND
Alarm input ground
end.
A
RS485_A port, control
external PTZ
B
RS485 port
RS485_B port, control
external PTZ
RX RS232_RX
，
RS232
receive end.
TX
RS232 port
RS232_TX
，
RS232
COM send out end.
G
GND
RS232 ground end
NA
IR light port
External IR light signal
control port.
RESET
RESET button
Restore factory default
setup.
When system is
running normally,
press the RESET
button for at least 5
seconds, system can
restore factory default
setup.
AUDIO OUT
Audio output port
Audio output 3.5mm
JACK port.
Output audio signal to
the passive device
such as earphone.
AUDIO IN
Audio input port
Audio input 3.5mm
Input audio signal
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