OS-214EX
User Manual
61
6.6.3 RS-232C
The RS-232C on the printer is DB9 female. It transmits data bit by bit in
asynchronous start-stop mode. The figure below shows its pinout.
1
2
3
4
5
6
7
8
9
Pin
Signal
Description
1
NA
No Function
2
TxD
Transmit
3
RxD
Receive
4
NA
No Function
5
GND
Ground
6
NA
No Function
7
CTS
Clear to Send
8
RTS
Request to Send
9
NC
No Connection
Host (DB9)
Printer (DB9)
Signal
Description
Pin
Pin
Description
Signal
CD
Carrier Detect
1
1
No Function
NC
RxD
Receive
2
2
Transmit
RxD
TxD
Transmit
3
3
Receive
TxD
DTR
Data Terminal Ready
4
4
No Function
NC
GND
Ground
5
5
Ground
GND
DSR
Data Set Ready
6
6
No Function
NC
RTS
Request to Send
7
7
Clear to Send
RTS
CTS
Clear to Send
8
8
Request to Send
CTS
CI
9
9
No Function
NC