IBM 6400 Setup Guide

5–3
Chapter 5. Printer Interfaces
RS–232 and RS–422 Serial Interfaces
NOTE: The RS–232 and RS–422 serial interface circuit characteristics are
compatible with the Electronic Industry Association Specifications
EIA–232–E and EIA–422–B.
The RS–232 and RS–422 serial interfaces enable the printer to operate with bit
serial devices that are compatible with an RS–232 controller. The input serial
data transfer rate (in baud) is selectable from the printer operator panel. Baud
rates of 600, 1200, 2400, 4800, 9600, 19,200, 38,400, 57,600, and 115,200 are
available.
The input format consists of a single start bit, 7 or 8 data bits, and one or two
stop bits. The number of data bits is determined by printer configuration. The
data bits are interpreted with the least significant bit first. Parity checking is
determined by printer configuration options selected from the operator panel.
The printer interface uses a first-in/first-out buffer. The asynchronous interface
accepts data as it is provided by the host. The length of the data cable from the
host computer to the printer must not exceed 50 feet (15 meters) for RS–232
interfaces and 4000 feet (1220 meters) for RS–422 interfaces.
Table 5–1. RS–232 Serial Interface Connector Pin Assignments
Input Signals
Output Signals Miscellaneous
Signal Pin Signal Pin Signal Pin
Received Data (RD) 3 Transmit Data (TD) 2 Chassis Ground 1
Clear To Send (CTS) 5 Request To Send (RTS) 4 Signal Ground 7
Data Set Ready (DSR) 6 Data Terminal Ready (DTR) 20
Data Carrier Detect (DCD) 8
Table 5–2. RS–422 Serial Interface Connector Pin Assignments
Input Signals
Output Signals Miscellaneous
Signal Pin Signal Pin Signal Pin
– Receive Data (–RD) 15 – Transmit Data (–TD) 19 Chassis Ground 1
+ Receive Data (+RD) 17 + Transmit Data (+TD) 25 Signal Ground 7

IBM 6400 Specifications

General

Brand	IBM
Model	6400
Category	Printer
Language	English