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User's Manual
Host
TD
(Pin 2)
RD
(Pin 3)
DSR
(Pin 6)
DTR
(Pin 20)
RTS
(Pin 4)
CTS
(Pin 5)
CD
(Pin 8)
SG
(Pin 7)
# 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 transmits 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)
TD
(Pin 2)
RD
(Pin 3)
DSR
(Pin 6)
DTR
(Pin 20)
RTS
(Pin 4)
CTS
(Pin 5)
CD
(Pin 8)
SG
(Pin 7)
INTERFACE INFORMATION
Printer
q
#
w
#
#
#
#
Printer (DTE)
TD
RD
DSR
DTR
RTS
CTS
CD
SG
TD
RD
DSR
DTR (RC)
RTS
CTS
CD
SG
D-9
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