User manual

25
4) Camera control interface
5) Constitution of junction box
z Camera control 1 and 2 compose each separate driver circuit internally.
ITEM Specification
Asynchronous Serial Interface
1 Start bit
8 Data bit
No parity
1 Stop bit
Synchronization system
& DATA length
11 Byte command
Mark logic "1"
Signal polarity
Space logic "0"
Transmit system Half duplex
Communication speed 9600 bps
Hardware
3 Cable (twist pair + 접지)
Item In/Out
Camera ↔Junction box ↔Sub key
RS-485+ Camera data +
RS-485- Camera data -
RS-422+
RS-422-
Camera
control 1
GND
RS-485+ Camera data +
RS-485- Camera data -
RS-422 in+
RS-422 in-
Camera
control 2
GND
RS-485+ RS-485+
RS-485- RS-485-
RS-422 in+ RS-422 in+
RS-422 in- RS-422 in-
Sub
keyboard
GND
SK RTS
RX RTS
GND