Dahua IPC-HF3500 Series User Manual page 21

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