RCX C-Link Series
Pinouts
EDT, Inc.
2011 June 29
17
Table 8
shows the pinout and how the standard firmware uses each wire.
Cable assembly – Lemo to female DB9 RS232
The female DB9 (EDT part #016-02445) supports integrated CMOS +3.3 V to RS232 level converters on a
small circuit board inside the DB9 connector shell.
This cable is designed to plug in directly to a host computer serial port. The cable offers an auxiliary UART
connection over the fiber, in addition to the UART normally associated with the Camera Link standard. This
auxiliary UART can be used, for example, to control the camera’s pan and zoom servo motors from the host
at 19.2 KBaud or less. Alternatively, it can be used for other low bandwidth signals.
Unlike the DB9 in the male assembly, this DB9 does not supply power to the extender. Instead, a red wire
(power) and a black wire (ground), both 24 inches long, are left loose so you can hook up your own power
source. The required power is 4.75 to 18 V DC.
Table 9
shows the pinout and how the standard firmware (in
rgb11.rcx
) uses each wire. DB9 pins 1, 4, and
6 are wired together and unconnected, 7 and 8 also are wired together, and 9 also is unconnected; these
signals are not otherwise used.
Table 8. Pinout – Male DB9 Cable
Lemo
Pin
Color
DB9
Pin
Standard Firmware (rgb11.rcx)
Signal Level
Comments
–
–
1
[unused]
–
All five CMOS 3.3 V
signals go to FPGA I/O
3.3V pins using series
100-ohm resistors.
Custom firmware can be
used to configure these
pins as input or output.
–
–
6
[unused]
–
1
green
2
AUX_TX, primary auxiliary transmit UART
CMOS +3.3 V
2
red
9
power to extender
+4.75 to +18 V
3
orange 7
AUX2_TX, secondary auxiliary transmit
CMOS +3.3 V
4
brown
8
AUX2_RX, secondary auxiliary receive
CMOS +3.3 V
5
white
4
SYNC, can be configured as an outgoing
copy of the camera’s frame-valid signal
CMOS +3.3 V
6
blue
3
AUX_RX, primary auxiliary receive UART
CMOS +3.3 V
7
black
5
ground
ground
Table 9. Pinout – Female DB9 Cable
Lemo
Pin
Color
DB9
Pin
Standard Firmware (rgb11.rcx)
Signal Level
–
–
1
[unused]
–
–
–
6
[unused]
–
1
green
2
AUX_TX, primary auxiliary transmit UART
RS232 (at DB9) to CMOS +3.3 V (at Lemo)
2
red
9
power to extender
+4.75 to +18 V (red wire out)
3
orange 7
reserved
–
4
brown
8
reserved
–
5
white
4
reserved
–
6
blue
3
AUX_RX, primary auxiliary receive UART
RS232 (at DB9) to CMOS +3.3 V (at Lemo)
7
black
5
ground
ground (black wire out)
