Appendix C— Communications Reference

RS-422 Serial Interface

Use the RS-422 interface in long line point-to-point direct connect installations. The printer cable must have the pin assignments for an RS-422 serial interface shown in the next table.

RS-485 Serial Interface

Use the RS-485 serial interface for Multi-Drop installations only. The printer cable must have the pin assignments for an RS-485 serial interface shown in the next table.

RS-232, RS-422, and RS-485 Serial Interface Pin Assignments

Interface

 

 

Pin

 

 

Name

 

RS-232/422/485

1

 

Chassis Ground (GND)

 

 

 

 

 

 

 

 

RS-232

 

 

2

 

 

Transmit Data (TD)

 

RS-232

3

 

Receive Data (RD)

 

 

 

 

 

 

 

 

RS-232/422/485

 

 

4

 

 

Request to Send (RTS)

 

 

 

 

 

 

 

RS-232/422/485

5

 

Clear to Send (CTS)

 

 

 

 

 

 

 

 

RS-232/422/485

 

 

7

 

 

Signal Ground (SG)

 

 

 

 

 

 

 

RS-232/422/485

11

 

Printer Status (PS)

 

 

 

 

 

 

 

 

RS-422/485

 

 

13

 

 

Input B

 

RS-422/485

14

 

 

Output A

 

 

 

 

 

 

 

 

RS-422/485

 

 

16

 

 

Input A

 

RS-422/485

19

 

 

Output B

 

 

 

 

 

 

 

 

RS-232/422/485

 

 

20

 

 

Data Terminal Ready

 

 

 

 

 

 

 

(DTR)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operation

Connect to pin 1, chassis ground, of connected device.

Output: Connect to receive data pin of connected device.

Input: Connect to transmit data pin of connected device.

Output: When you use a modem, connect to modem RTS pin. The modem sets RTS to true before transmission. The printer sets RTS to false after transmission.

Input: When you use a modem, connect to modem CTS pin. The modem must set CTS true before the printer transmits data. If not connected, CTS sets itself true.

To enable communications, connect to signal ground of connected device. Completes circuit for all RS-232 signals.

Output: When not using software flow control (XON/XOFF), connect to input of connected device (for example, CTS). Indicates printer mechanical status and status of printer input buffer.

Input: Serial differential data to the printer.

Output: Serial differential data from the printer.

Input: Serial differential data to the printer.

Output: Serial differential data from the printer.

Output: When you use a modem, connect to modem DTR pin.

When using Intermec Standard Protocol, this pin indicates that the printer is switched on.

When using XON/XOFF or hardware flow control, this pin indicates the printer mechanical status and the status of the printer input buffer.

EasyCoder 3400e Bar Code Label Printer User’s Manual

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Genicom 3400e user manual RS-422 Serial Interface, RS-485 Serial Interface, Interface Pin Name, Operation

3400e specifications

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