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5
Overview
The printer interface is the point where the data line from the host computer
plugs into the printer. The interface processes all communications signals and
data to and from the host computer. The printer interface consists of a printed
circuit board assembly (PCBA) and a cable connector for the data line.
Communication signals and data may be sent over parallel or serial lines.
Each IBM 6400-D Series printer is equipped with three parallel interface
protocols and two serial interface protocols. Each interface is selected via the
operator panel configuration menu. Refer to Chapter 3, "Configuring the
Printer."
This chapter describes the interfaces provided with the printer. In addition,
instructions are provided for configuration of terminating resistors.
•
RS-232 serial
•
RS-422 serial
•
PC Parallel
•
IEEE 1284
RS-232 And RS-422 Serial Interfaces
NOTE: The RS-232 and RS-422 serial interface circuit characteristics are
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.
Printer Interfaces
compatible with the Electronic Industry Association Specifications
EIA**-232-E and EIA-422-B.
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