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Rs-422 serial interface, Rs-485 serial interface – IBM EasyCoder 3400e User Manual

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EasyCoder 3400e Bar Code Label Printer User’s Manual

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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
table on this page.

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 table on this
page.

Interface

Pin No.

Name

Operation

RS-232/422/485

1

Chassis Ground
(GND)

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

RS-232

2

Transmit Data
(TD)

Output: Connect to receive data pin of connected device.

RS-232

3

Receive Data
(RD)

Input: Connect to transmit data pin of connected device.

RS-232/422/485

4

Request to Send
(RTS)

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.

RS-232/422/485

5

Clear to Send
(CTS)

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.

RS-232/422/485

7

Signal Ground
(SG)

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

RS-232/422/485

11

Printer Status (PS)

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.

RS-422/485

13

Input B

Input: Serial differential data to the printer.

RS-422/485

14

Output A

Output: Serial differential data from the printer.

RS-422/485

16

Input A

Input: Serial differential data to the printer.

RS-422/485

19

Output B

Output: Serial differential data from the printer.

RS-232/422/485

20

Data Terminal
Ready (DTR)

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.