12
4) Camera control interface
Item
Specification
Asynchronous serial interface
1 Start bit
8 Data bit
No Parity
1 Stop bit
Synchronization system & word lenght
11 Byte command
Signal polarity
Mark logic “1”
Space logic “0”
Transmit direction
Half duplex
Transmit speed
9600 BPS
Hardware
3 cable (twist+ground)
5) Constitution of Junction box pin
Item
Input/Output
Camera
Ö
Junction box
Ö
Sub key
RS-485+
Camera data +
RS-485-
Camera data -
RS-422 In+
RS-422 In-
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
•
Camera control 1 and 2 compose each separate drive circuit internally
6) Constitution of pin between controller and Junction box
(modular jack)
Pin No.
Controller
Ö
Ö
Junction box
1
RX-TXD
2
B +9V
3
RX-RXD
4
RX-RS
5
GND
6
SK-TXD
7
SK-RS
8
SK-RXD