English _17
● INSTALLATION & CONNECTION
Resistance of copper wire [at 20°C (68°F)]
Wire specification (AWG) #24(0.22mm
2
) #22(0.33mm
2
) #20(0.52mm
2
) #18(0.83mm
2
)
Resistance (Ω/m)
0.078 0.050 0.030 0.018
Voltage Drop (V/m)
0.028 0.018 0.011 0.006
Recommended Distance (m)
Less than 20 Less than 30 Less than 30 Less than 30
• As shown in the table above, you may encounter a voltage-sag depending on the
wire length. If you use an excessively long wire for camera connection, the camera
may not work properly.
Voltage for proper camera operation: DC 12V±10%, AC 24V±10%
Voltage drop shown in the table above may show difference from the actual depending on the
manufacturer and cable type.
RS-485 Communications
Using RS-485 communication, the camera menu can be accessed using Samsung
Techwin’s System Controller or the DVR.
• For accessing the camera from a computer
Use a RS-485 converter to connect the camera’s control port with the computer’s
serial cable.
Ex) Serial port (COM1) of computer
Serial Cable
RS-485 Converter
Camera’s
RS-485 control port
• For accessing the camera from a DVR or the System Controller
connect the camera’s RS-485+ and RS-485– terminals to the RS-485 control board’s
terminals of desired device with a RS-485 cable (TRX+ and TRX–).
Control ports of RS-485 Controller RS-485 ports of the camera
(+) CONNECTION TERMINAL (TRX+) 485+
(–) CONNECTION TERMINAL (TRX–) 485–
Default RS-485 communication settings
Item Camera Number Transfer Rate
Communication Mode
Return Data
Default 1 9600 8-NONE-1 Not used
J
When constructing a proprietary controller for direct camera control, apply Pelco-D or Samsung-Techwin
protocol.
Use only a DVR model that supports HD-SDI saving.
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