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Serial Interface (Option)
C-6
C.2 Serial Interface (Option)
Installing the optional serial interface kit (IB-10E) in the printer enables
connection to a computer with an RS-232C or RS-422A standard serial
interface.
C.2.1 RS-232C Interface
Interface Signals
The pins of the printer's RS-232C interface connector carry the
signals listed in
Table C. 2
. The table also indicates whether each
signal is incoming or outgoing with respect to the printer.
Table C.2 RS-232C Signal Pin Assignments
Brief descriptions of the signals follow.
FG - Frame Ground - (Pin 1)
This pin is connected directly to the printer frame.
TXD - Transmit Data - (Pin 2)
This output carries asynchronous data sent by the printer to the computer.
It is used mainly in handshaking protocols.
RXD - Receive Data - (Pin 3)
This input carries serial asynchronous data sent by the computer to the
printer.
RTS - Request To Send - (Pin 4)
This output is always held high (above 3 volts).
Pin In/out Signal Description
1 - FG Frame ground
2 Out TXD Transmit Data
3InRXDReceive Data
4 Out RTS Request To Send
5InCTSClear To Send
6 In DSR Data Set Ready
7 - SG Signal Ground
20 Out DTR Data Terminal Ready