AS-700, AS-710
AS-700, AS-710
AS-700, AS-710
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8.2.2.2 Plug Assignment<br />
PIN Signal Signal<br />
Input/Output<br />
Meaning<br />
1 --- - free<br />
2 R x d I Received data<br />
3 T x d O Transmitted data<br />
4 DTR O Data Terminal Ready<br />
5 GND - Signal Ground<br />
6 --- - free<br />
7 RTS O +12V<br />
8 CTS I Clear to Send<br />
9 --- - free<br />
Pin 2<br />
Received Data (RxD):<br />
Serial transfer of data from the computer to the printer.<br />
Pin 3<br />
Transmitted Data (TxD):<br />
Serial transfer of data from the printer to the computer system or the terminal (e.g.<br />
X ON /X OFF symbol).<br />
Pin 4<br />
Data Terminal Ready (DTR):<br />
Printer output, which allows the transfer of data to the printer or which interrupts it<br />
(handshaking). Data transfer is possible, when DTR is high. It is not possible, when<br />
DTR is low.<br />
Pin 5<br />
Signal Ground (GND):<br />
The reference potential for the entire data exchange.<br />
Pin 7<br />
Request to Send (RTS):<br />
This signal is always high with a switched on printer.<br />
Pin 8<br />
Clear to Send (CTS):<br />
Input of the printer, which allows the transfer of data to the computer or which interrupts<br />
it. When the input is high, then the printer may transmit the data. For the<br />
software handshaking with Xon/Xoff, this input must always be high.<br />
72
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