Samsung SNB-6003 User Manual page 39

Connecting an external RS-485 device (SNB-6003/SNB-6004)
Connect the camera with an external device using the [RS-485 +, -] ports.
You can control the pan/tilt operations of the camera via RS-485 communications.
The GND connection is recommended for RS-485 communications. If you encounter a communication
`
failure, connect the GND pin as appropriate to correct the GND level between camera and external device.
Connecting to the I/O port box (SND-6083/SND-6084)
Connect the Alarm I/O cable to the corresponding port of the inner port box.
• ALARM OUT : Used to connect the alarm output signal.
• ALARM IN : Used to connect the alarm input sensor or external day/night sensor.
• GND : Used for earth-grounding.
To connect the external sensor
Connect one strand of each signal line (2-strand) of the sensors to the [ALARM IN] port,
and connect the other strand to the [GND] port.
Alarm In Wiring Diagram
External
connection
Sensor
ALARM IN (5mA SINK)
Inside of the camera
RESISTOR
RESISTOR
MLCC
GND
Alarm Sensor
VCC_3.3V
RESISTOR
DIODE
TRANSISTOR
GND
English _39