Xerox FS-C8008N, FS-C8008DN manual B.3 Serial Interface Option, B.3.1 Interface Signals

B.3 Serial Interface (Option)

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.

B.3.1 Interface Signals

Table B-4below shows the pins and corresponding input and output signals of the RS-232C interface connector.

Pin	In or out	Signal	Description
1	—	FG	Frame Ground. This pin is connected directly to the printer
			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.
3	In	RXD	Receive Data. This pin is used to input serial asynchronous
			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.
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.

Table B-4

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.

B-6