Samsung SCP-3120 User Manual page 18

introduction
Camera Wiring Interface Board
Control Signal Connection
· RS485 Communications
Camera
485+
485-

M
The maximum power capacity of the built-in relay is 30V DC/2A, 125V AC/0.5A, and
250V AC/0.25A.

Connecting the power connector and GND incorrectly to the NC/NO and COM ports
may cause a short circuit and fi re, damaging the camera.
18_ introduction
Controller
or DVR
R+/RX+
R-/RX-