Serial Interface (Ep C270N Only) - Kyocera EcoPro EP C170N User Manual

Computer Interface

Serial Interface (EP C270N only)

Interface Signals
Interface voltage levels
4-6
Installing the optional serial interface board kit (IB-11) in the printer enables
connection to a computer with an RS-232C standard serial interface.
The table below shows the pins and corresponding input and output
signals of the RS-232C interface connector.
Pin In or out Signal
1 — FG
2 Out TXD
3 In RXD
4 Out RTS
5 In CTS
6 In DSR
7 — SG
20 Out DTR
The voltage levels of the interface signals conform to EIA RS-232C
specifications. The voltage level of SPACE is 3 to 15 volts. The voltage
level of MARK is -3 to -15 volts. Voltages between -3 and 3 volts are
undefined.
Description
Frame Ground. This pin is connected
directly to the printer frame.
Transmit Data. This pin is used to output
asynchronous data sent from the printer
to the computer. This signal is often used
in handshaking.
Receive Data. This pin is used to input
serial asynchronous data sent from the
computer to the printer.
Request To Send. This output is always
high (above 3 volts).
Clear To Send. Not used.
Data Set Ready. Not used.
Signal Ground. This pin is used to
establish a common reference level for
the voltages of all signals other than
Frame Ground.
Data Terminal Ready. This pin is used to
notify the status of the printer buffer (i.e.,
nearly full or nearly empty) when
handshaking is used. The pin goes high
(above 3 volts) when the buffer is able to
accept more data.
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