Transmission Protocols And Connection Diagrams; Dtr - Ready/Busy - PSI Matrix PP 803 Benutzerhandbuch

Transmission rate: 600, 1200, 2400, 4800, 9600, or 19200 baud
Parity: even, odd, or none, Word length: 7, or 8 bits
Number of stop bits: In receive mode the printer accepts 1, or 2 stop bits.
The printer transmits always two bits.
Transmission Protocols:

DTR - Ready/Busy (only RS-232C)

XON/XOFF

XON/XOFF + DTR (only RS-232C)
A.1.2. Transmission Protocols and Connection Diagrams
A.1.2.1
(Supported RS-232C Protocols) - Full Duplex Local Connection
This protocol uses the following signal lines:
Pin 1 Protective Ground (PG)
2 Transmit Data (TXD)
3 Receive Data (RXD)
5 Clear to Send (CTS)
7 Signal Ground (SG)
20 Data Terminal Ready (DTR)
The signal lines TXD (pin 2) and CTS (pin 5) are only necessary if the
Note:
Device Status Report is required.
The READY / BUSY DTR protocol uses the DATA TERMINAL READY (DTR)
line to control the transmission of data from the host to prevent a
buffer overflow
.

DTR - Ready/Busy

Appendix A System Interface Description
A-3