KYOCERA FS-680 Manuel d'utilisateur Page 125

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Serial (RS-232C/RS-422A) Interface (Option)
C-8
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.
RS-232C Interface Voltage Levels
The voltage levels of the interface signals conform to EIA RS-232C specifications. SPACE is from 3
volts to 15 volts. MARK is from 3 volts to 15 volts. Voltages between 3 volts and 3 volts are
undefined.
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