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Appendix A System Interface Description

A-3

1.2 Transmission Protocols and Connection Diagrams

1.2.1 DTR - Ready/Busy

(Supported RS-232C Protocols) - Full Duplex Local Connection

This protocol uses the following signal lines:

S Pin 1 Protective Ground (PG)

S 2 Transmit Data (TXD)

S 3 Receive Data (RXD)

S 5 Clear to Send (CTS)

S 7 Signal Ground (SG)

S 20 Data Terminal Ready (DTR)

Note: The signal lines TXD (pin 2) and CTS (pin 5) are only necessary if the

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.

Note: Printer DTR may be connected to host DSR + CTS or only to host DSR

and a bridge between RTS and CTS.

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Output Solutions C I - 8 0 6 0 Uživatelský manuál Strana 125