Kyocera FS 1700 FS-1700/3700 Users Manual - Page 105

C.2. RS-232C/RS-422A Interface, RS-232C interface, C-5

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C.2. RS-232C/RS-422A Interface C.2. RS-232C/RS-422A Interface 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 Pin In/out Signal Description 1 - FG Frame ground 2 Out TXD Transmit Data 3 In RXD Receive Data 4 Out RTS Request To Send 5 In CTS Clear To Send 6 In DSR Data Set Ready 7 - SG Signal Ground 20 Out DTR Data Terminal Ready 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). CTS - Clear To Send - (Pin 5) DSR - Data Set Ready - (Pin 6) Unused. SG - Signal Ground - (Pin 7) All signals can transmit between the printer and the host computer to send each signals with a signal ground. DTR - Data Terminal Ready - (Pin 20) This output is used as a buffer nearly-full handshake line. It is held high (above 3 volts) when the buffer can accept more data. C-5

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C.2.
RS-232C/RS-422A Interface
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
Pin
In/out
Signal
Description
1
–
FG
Frame ground
2
Out
TXD
Transmit Data
3
In
RXD
Receive Data
4
Out
RTS
Request To Send
5
In
CTS
Clear To Send
6
In
DSR
Data Set Ready
7
–
SG
Signal Ground
20
Out
DTR
Data Terminal Ready
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).
CTS – Clear To Send – (Pin 5)
DSR – Data Set Ready – (Pin 6)
Unused.
SG – Signal Ground – (Pin 7)
All signals can transmit between the printer and the host computer to send each signals with
a signal ground.
DTR – Data Terminal Ready – (Pin 20)
This output is used as a buffer nearly-full handshake line. It is held high (above 3 volts) when
the buffer can accept more data.
C.2.
RS-232C/RS-422A Interface
C-5