Postek Q8 - Appendix A: IO Interface Specifications; RS232 Serial Interface Details

Appendix A: IO Interface Specifications Q8 Series User’s Manual
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Appendix A: IO Interface Specifications
RS232 Serial Interface
The RS232 connector on the printer is a DB9F：
Pin
Direction
Definition
1 / /
2
Out
TX
3
In
RX
4
In
CTS
5
-
Ground
6
Out
RTS
7
In
DSR
8
Out
DTR
9
/
/
Connection with the Host:
Host 25S
Printer 9S
Host 9S
Printer 9S
TX 2
………
3 RX
RX 2
………
2 TX
RX 3
………
2 TX
TX 3
………
3 RX
DSR 6
………
8 DTR
DTR 4
………
7 DSR
DTR 20
………
7 DSR
DSR 6
………
8 DTR
RTS 4
………
4 CTS
RTS 7
………
4 CTS
CTS 5
………
6 RTS
CTS 8
………
6 RTS
GND 7
………
5 GND
GND 5
………
5 GND
Alternately, you can connect the 3 wires.
Host 25S
Printer 9S
Host 9S
Printer 9S
TX 2
………
3 RX
RX 2
………
2 TX
RX 3
………
2 TX
TX 3
………
3 RX
GND 7
………
5 GND
GND 5
………
5 GND
pin 4
pin 4
pin 5
pin 6
pin 6
pin 7
pin 20
pin 8
Baud rate: 9600, 19200, 38400, 57600 (Baud Rate set by DIP switches 7–8)
Data format: always 8 data bits, 1 start bit and 1 stop bit.
Parity: always non parity.
Flow control: RTS/CTS (Hardware flow control).
If using software or drivers under the Windows environment, the flow control must be set to “hardware”
Any communications port can transmit data from the host (RS232 and USB). Preliminary communications settings are not
required since the printer will automatically detect which port is active. Never send data from 2 ports at the same time. Data
cannot be sent to more than one port simultaneously, otherwise, data corruption and print errors may occur.