Interfaces
\text/etd/DA615\Interfaces
6.4 DA615 instruction manual
RS-232-C serial interface
The DA615 printer has a standard RS-232-C serial interface that is compatiblewith
with most computers and terminals.
Connecting
socket
The DA615 printer is equipped with a standard DB-9 serial connection
socket.
Pin assignment
PIN Signal Signal- Meaning
Input/Output
1 --- - Free
2 R x d E Receive data
3 T x d A Transmit data
4 DTR A Clear to receive
5 GND - Signal ground
6 --- - Free
7 RTS A +12V
8 CTS E Clear to send
9 --- - Free
Pin 2
Received Data (RxD):
Serial data transfer from computer to printer.
Pin 3
Transmitted Data (TxD):
Serial data transfer from printer to computer system or terminal (e.g.
X
ON
/X
OFF
characters).
Pin 4
Data Terminal Ready (DTR):
Printer output that clears data transfer to the printer or aborts i
(handshaking). Data transfer is possible when DTR is high. It is no
possible when DTR is low.
Pin 5
Signal Ground (GND):
This is the reference potential for the entire data exchange.
Pin 7
Request to Send (RTS):
This signal is always high when the printer is switched on.
Pin 8
Clear to Send (CTS):
Printer input that clears or aborts data transmission to the computer.
When the input is high, the printer can transmit data. This input mus
always be high for software handshaking with Xon/Xoff.
