Fujitsu DL6400 manual Cable Wiring, Td Rd

DL6400/6600 Book Page 10 Friday, July 31, 1998 11:42 AM

Cable Wiring

Cable Wiring

The printer allows two types of serial communication control: DSR enabled and DSR disabled. The type used is determined by processor requirements and affects the way the interface cable is wired. To select between DSR-enabled and DSR-disabled control, use the printer HARDWRE function (see “Changing Hardware Options” on page 8-24 and in subsequent sections).

DSR-disabled control offers simpler cabling and communication than DSR-enabled control. It can be used for interfacing with an IBM or most other PCs. With DSR-disabled control, input control signals DSR, CTS, and CD are always considered high, regardless of their actual status. Therefore, a wire connection for these pins is not required. The following figure below shows the wiring required for connection to an IBM PC.

	Processor
TD	(pin 2)
RD	(pin 3)	w
DSR	(pin 6)
DTR	(pin 20)
RTS	(pin 4)		#
CTS	(pin 5)
CD	(pin 8)
SG	(pin 7)

Printer

q

TD RD

# DSR DTR (RC)

# RTS

# CTS

# CD

SG

# Open wire

Wire q is unnecessary for the DTR (or RC) protocol. Some computers may not require wire w.

Figure C–1 Cable wiring (DSR disabled control)

DSR-enabled control enables communication with an RS-232C interface. The CTS and DSR input control signals are enabled; CD is ignored. DSR must be high when the printer receives data. If the printer has data to be transmitted, it transmits data immediately when both DSR and CTS are high.

C-10 User’s Manual