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RS-422 Serial Interface
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RS-422 Serial Interface
This interface is used with bit serial devices compatible with EIA-
RS-422B or CCITT V.27 and V.11 standards. The interface circuit
characteristics are compatible with the Electronic Industry
Association Specification.
The printer is configured as Data Terminal Equipment (DTE).
The serial data transfer baud rate is selectable from the control
panel. The input format consists of a single start bit, 7 or 8 data bits,
and one or two stop bits. The operator can set the number of data
bits from the control panel. The data bits are interpreted with the
least significant bit first. The operator can also set parity checking
via the control panel. The printer interface uses a first-in/first-out
buffer with the size selectable from the control panel.
The asynchronous interface accepts data as it is provided by the
host computer.
The maximum cable length from the host computer to the printer is
4000 feet.
The maximum baud rate supported by the RS-422 serial interface
is 256 KB.