Xerox FS-C8008DN 用户手册
B.3 Serial Interface (Option)
B-6
B.3
Serial Interface (Option)
Installing the optional serial interface board kit (IB-11) in the printer enables connection to a
computer with an RS-232C standard serial interface.
computer with an RS-232C standard serial interface.
B.3.1
Interface Signals
interface connector.
B.3.2
Interface voltage levels
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.
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.
Pin
In or out
Signal
Description
1
—
FG
Frame Ground. This pin is connected directly to the printer
frame.
frame.
2
Out
TXD
Transmit Data. This pin is used to output asynchronous data
sent from the printer to the computer. This signal is often used
in handshaking.
sent from the printer to the computer. This signal is often used
in handshaking.
3
In
RXD
Receive Data. This pin is used to input serial asynchronous
data sent from the computer to the printer.
data sent from the computer to the printer.
4
Out
RTS
Request To Send. This output is always high (above 3 volts).
5
In
CTS
Clear To Send. Not used.
6
In
DSR
Data Set Ready. Not used.
7
—
SG
Signal Ground. This pin is used to establish a common refer-
ence level for the voltages of all signals other than Frame
Ground.
ence level for the voltages of all signals other than Frame
Ground.
20
Out
DTR
Data Terminal Ready . This pin is used to notify the status of
the printer buffer (i.e., nearly full or nearly empty) when hand-
shaking is used. The pin goes high (above 3 volts) when the
buffer is able to accept more data.
the printer buffer (i.e., nearly full or nearly empty) when hand-
shaking is used. The pin goes high (above 3 volts) when the
buffer is able to accept more data.
Table B-4