Specifications

59
Alternatively you can just connect the 3 wires in the following
way.
Host 25S
Printer 9P
Host 9S
Printer 9P
(PC or compatible)
(PC or compatible)
TX 2
……
2 RX
TX 3
……
2 RX
RX 3
……
3 TX
RX 2
……
3 TX
GND 7
……
5 GND
GND 5
……
5 GND
pin 4
pin 4
pin 5
pin 6
pin 6
pin 7
pin 20
pin 8
The most simple way to connect to other hosts (not PC
compatible) or terminals is:
Printer
Terminal/Host
Pin 2- RxData
………
TxData
Pin 3- TxData
………
RxData
Pin 5- Ground
………
Ground
In general as long as the data quantity is not too large or you
use Xon/Xoff as flow control, there will be no problem at all.
Baud rate: 600, 1200, 2400, 4800, 9600, 19200 and 38400.
Data format: always 7 or 8 data bits; 1,2 stop bit.
Parity : note, even, odd parity.