INTERFACE INFORMATION

 

Host

 

 

q

Printer

TD

(Pin 2)

 

 

TD

 

 

 

RD

(Pin 3)

 

 

 

RD

DSR

(Pin 6)

 

#

 

DSR

DTR (Pin 20)

 

w

 

DTR (RC)

 

 

 

RTS

(Pin 4)

#

#

 

RTS

CTS

(Pin 5)

 

#

 

CTS

CD

(Pin 8)

 

#

 

CD

SG

(Pin 7)

 

 

 

SG

# indicates an open wire.

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

DSR-enabled control enables communication using 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 to the computer, the printer trans- mits the data when both DSR and CTS are high.

When using DSR-enabled control, use a straight-through cable to connect to a DCE (data communications equipment) device. Use a null-modem cable to connect to a DTE (data terminal equipment) device, as shown below.

 

Host (DTE)

 

Printer (DTE)

TD

(Pin 2)

 

 

TD

RD

(Pin 3)

 

 

RD

DSR (Pin 6)

 

 

DSR

DTR (Pin 20)

 

 

DTR

RTS

(Pin 4)

 

 

 

RTS

 

 

CTS

(Pin 5)

 

 

 

CTS

 

 

 

CD

(Pin 8)

 

 

 

CD

 

 

SG

(Pin 7)

 

 

 

SG

 

 

 

Interface

User's Manual

D-9

Page 221
Image 221
Fujitsu DL3800 manual Dsr