Appendix C Overview

RS-422 Serial Interface Connector Pin Assignments

The printer provides a 25-pin DB-25S connector inside the lower cabinet for connection of a serial interface cable. This connector is also used for the RS-232 serial interface. Selection of the desired interface is determined by the position of the RS232/422 switch located inside the lower cabinet of the printer.

The following table lists the pin assignments of the RS-422 interface connector.

Pin

Signal

Direction

 

 

 

1

Chassis Ground

Not applicable

2

Transmit Data A (TxDA)

From printer

14

Transmit Data B (TxDB)

From printer

3

Receive Data A (RxDA)

To printer

16

Receive Data B (RxDB)

To printer

4

Request To Send A (RTSA)

From printer

19

Request To Send B (RTSB)

From printer

5

Clear To Send A (CTSA)

To printer

13

Clear To Send B (CTSB)

To printer

6

Data Set Ready (DSR) / Clock A

To printer

22

Clock B

To printer

7

Signal Ground

Not applicable

20

Data Terminal Ready A (DTRA)

From printer

23

Data Terminal Ready B (DTRB)

From printer

 

 

 

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Printronix L5035 user manual RS-422 Serial Interface Connector Pin Assignments, Pin Signal Direction
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