Rs-232 Serial Interface; Rs-232 Interface Signals - Printronix P6000L User's Reference Manual

C3 board. Refer to Control Panel Switch Function diagram in the Configuration chapter for
detailed information on selecting the various parameter values.
NOTE: If there are extea or missing characters, try changing the strobe edge select from
leading to trailing.

RS-232 Serial Interface

This interface enables the printer to operate with bit serial devices compatible to an RS-232C
controller. The input serial data transfer baud rate is selectable from the control panel. Baud
rates of 150, 300, 600, 1200, 2400, 4800, 9600, 19,200 or external control are available. Baud
rates are selected from the control panel; external control is selected by jumper configuration
on the logic C board as described in the Configuration chapter. 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 setup options selected from the control panel.
The printer interface uses a first in/first out buffer with the size configuration selectable from
the control panel. The asynchronous interface accepts data as it is provided by the user. The
maximum data line length (cable length) from the controller (host computer) to the printer is
50 feet. The interface circuit characteristics are compatible with the Electronic Industry Asso
ciation Specification.

RS-232 Interface Signals

RS-232 compatible serial interface signals between the computer and the printer are defined
as follows. The RS-232 connector mounted on the printer is a 25 pin DB-25S type. The mat
ing connector is a DB-25P. Signal Pin assignments are listed in Table 7-3.
Received Data - Serial data stream to the printer.
Transmitted Data - Serial data stream from the printer for transmitting status and control in
formation to the host. Subject to protocol selection.
Request To Send (RTS) - Control signal from the printer. Subject to configuration.
Clear to Send (CTS) - Status signal to the printer indicating the host is ready to receive data/
status signals from the printer. If enabled from the configuration menu, the ON condition is
required in both CTS and DSR for the printer to send to the host, including sending XON and
XOFF handshake characters.
Data Set Ready (DSR) - Status signal to the printer indicating the host ready for the printer to
send characters to the host.
Carrier Detect (CD) - Status signal to the printer. If enabled from the configuration menu, the
ON condition is required in both CD and DSR for the printer to receive data. Available as a
configuration setup option.
Reverse Channel - Control signal from the printer. Subject to configuration.
Data Terminal Ready (DTR) - Control signal from the printer. Subject to configuration.
Interfaces 7-5