Rs-422 Interface; Rs-422 Pin Assignment - Genicom GEK-00027C User Manual

RS-422 Interface

Pin
1
15
17
19
25
5180 User's Manual
This interface is a four-wire, balanced-voltage variant of RS-232. In
order to use this interface. To use this interface, it must be selected
from the Serial Type menu. The character frame, baud rate, and
protocol settings are accessible from the same Serial Setup menu as
the RS-232. See page 74 for instructions to modify these settings.
TheReady/Busy protocol must be busy-by-code, usually XON/XOFF,
which is enabled in the default state of the printer.

RS-422 Pin Assignment

The RS-422 interface shares the 25-pin, D connector with the RS-232
interface.
25-pin Serial
Connector
Circuit Description
Frame Ground (Not normally used)
RX-A Received Data
RX-B Received Data
TX-A Transmitted Data
TX-B Transmitted Data
The polarity indicators A and B, are defined by the EIA specification.
A is negative with respect to B in the mark (logic 1) state of the
device.
192
Source
Host
Host
Printer
Printer
GEK-00028C