Appendix A System Interface Description

Additional Information

After Power-ON DTR is activated and the printer is ready to receive data.

DTR is deactivated when the interface buffer has only space left only for 256 more characters. Further incoming data will be stored until the interface buffer is full. All data sent in addition will get lost.

DTR is activated again if there is a free interface buffer space of 512 characters.

DTR is immediately deactivated, if local mode is entered.

It is activated again, if local mode is left and a minimum of 512 bytes interface buffer is available.

Appendix A System Interface Description

2.2XON / XOFF

This protocol requires the signal lines.

 

 

-

Pin

1

Protective Ground (PG)

- Pin

5 Clear to Send (CTS)

-

 

2

Transmit Data (TXD)

-

6 Data Set Ready (DSR)

-

 

3

Receive Data (RXD)

-

7 Signal Ground (SG)

-

 

4

Request to Send (RTS)

-

20 Data Terminal Ready

 

 

 

 

 

(DTR)

Standard Connection

 

 

 

25 pin

RS-232C

25 pin

 

 

 

1

 

1

 

 

 

2

 

2

 

 

 

3

 

3

 

 

 

4

 

4

 

 

 

5

 

5

 

 

 

6

 

6

 

 

 

7

 

7

 

 

 

20

 

20

 

For local connections RTS with CTS can be connected and likewise DTR

 

with DSR.

 

 

 

 

25 pin

RS-232C

25 pin

 

 

 

1

 

1

 

 

 

2

 

2

 

 

 

3

 

3

 

 

 

4

 

4

 

 

 

5

 

5

 

 

 

6

 

6

 

 

 

7

 

7

 

 

 

20

 

20

Note:

Bridge between 4 and 5 means alternative RTS to CTS.

 

 

Cables with bridges at printer side (4 to 5 and 20 to 6) for older PMs

 

 

(lower than PM-40A4) can also be used!

 

A-5A-6

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Epson MTX 1345 manual Additional Information, XON / Xoff, Standard Connection

MTX 1345 specifications

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