Fujitsu DL3800 manual Serial Interface, Pin Signal Direc Description Name, Rts, Cts

INTERFACE INFORMATION

SERIAL INTERFACE	RS-232C is the standard serial interface for data terminal equipment.
	The cable connector at the printer side should be a D-subminiature
	Cannon or Cinch DB-25P male connector or equivalent that conforms
	to EIA standards.
	The table that follows shows the pin assignments commonly used by
	most computers. In the table:
	• “Input” denotes a signal from the computer to the printer.
	• “Output” denotes a signal from the printer to the computer.
	• The signal level for mark state (logical 1) is -3 V or lower; for

space state (logical 0), it is +3 V or higher.

Pin	Signal	Direc-	Description
No.	Name	tion
1	FG	–	Frame Ground
2	TD	Output	Transmitted Data. This pin carries informa-
			tion from the printer to the computer.
3	RD	Input	Received Data. This pin carries information
			from the computer to the printer.
4	RTS	Output	Request To Send. Spaces are sent when the
			printer is ready to transmit data.
5	CTS	Input	Clear To Send. Spaces are sent when the
			computer is ready to receive data.
6	DSR	Input	Data Set Ready. Spaces are sent when the
			computer has been powered on and is ready
			to receive or transmit data.
7	SG	–	Signal Ground (common return)
8	CD	Input	Carrier Detect. Spaces are sent when the
			computer allows the printer to receive data.
11	RC	Output	Reverse Channel. This signal is used instead
			of the DTR signal in the RC protocol. Spaces
			are sent when the printer is ready to receive
			or transmit data.
20	DTR	Output	Data Terminal Ready. Spaces are sent when
			the printer has been powered on and is ready
			to receive or transmit data.

Interface

User's Manual D-7