Yamaha RCX221 User Manual page 388

3. Communication specifications
3. Connection cable examples
a. Cable capable of hardware busy control
Chapter
7
b. Cable not using control wire
* For signal wire layout on the external device, refer to the instruction manual for
that device.
7-4
Controller
NC 1
RXD 2
TXD 3
NC 4
GND 5
NC 6
RTS
7
CTS 8
NC 9
Controller
NC 1
RXD 2
TXD 3
NC 4
GND 5
NC 6
RTS 7
CTS 8
NC 9
External device
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
External device
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS