Appendix A System Interface Description

2 Transmission Protocols

2.1DTR - Ready/Busy

(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)

(with internal Pull-up) 1)

-

5

Clear to Send (CTS)

(with internal Pull-up) 1)

-7 Signal Ground (SG)

-20 Data Terminal Ready (DTR)

The READY / BUSY DTR protocol uses the DATA TERMINAL READY line to control the transmission of data from the host to prevent a buffer overflow.

Note: The signal lines TXD (pin 2) and CTS (pin 5) are only necessary if the Device Status Report is required (see picture "Connection for Unidirectional Transfer Mode").

- Version 1 - Connection for Unidirectional Transfer Mode

25 pin

RS-232C

25 pin

 

1

1

 

2

2

 

3

3

 

4

4

 

5

5

 

 

or

 

6

6

 

7

7

 

20

20

1)Cables with bridges at printer side (4 to 5) for older PMs (lower than PM-40A4) can also be used!

Appendix A System Interface Description

-Version 2 - Connection full Duplex Transfer Mode

The READY / BUSY DTR protocol uses the DATA TERMINAL READY line to control the transmission of data from the host to prevent a buffer overflow.

25 pin

RS-232C

25 pin

 

1

1

 

2

2

 

3

3

 

4

4

 

5

5

 

6

6

 

7

7

 

20

20

- Version 3 - PC Connection for full Duplex Transfer Mode

25 pin

RS-232C

9 pin

 

 

2

 

2

3

 

3

4

 

4

5

5

6

6

7

7

20

 

 

 

8

 

 

Note: Bridge between 7 and 8 on PC side means alternative RTS to CTS.

A-3A-4

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Image 63
Epson MTX 1345 manual Transmission Protocols DTR Ready/Busy, Version 1 Connection for Unidirectional Transfer Mode

MTX 1345 specifications

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