Epson ActionLaser 1500 User Manual - Page 174

A-14 Technical Specifications, Signal, Direction, Description

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Signal Pin 4 5 6 8 20 Signal RTS CTS DSR SG DCD DTR Direction Description OUT Request to send. This pin is held high by the printer. IN Clear to send. This pin indicates that the computer is ready to receive data from the printer. The printer will not proceed unless the signal is high. Can be set high with SelecType. IN Data set ready. This pin indicates that the computer is ready to receive data from the printer. Can be set high with SelecType. Signal ground. This pin provides a ground for all the signal lines. IN Data carrier detect. Always ignored. OUT Data terminal ready. This pin indicates whether or not the printer is ready to receive data. If the printer ready protocol is not selected, this pin is always high (i.e. the printer is ready to receive data). If printer ready protocol is selected, the printer can accept data when the pin level is high, and cannot accept data when the pin level is low. When the DTR signal goes low the host computer must stop sending data within 128 characters. Can be set high or low with SelecType. A-14 Technical Specifications

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Signal
Pin
4
5
6
8
20
Signal
RTS
CTS
DSR
SG
DCD
DTR
Direction
Description
OUT
IN
IN
IN
OUT
Request to send. This pin is held
high by the printer.
Clear to send. This pin indicates
that the computer is ready to
receive data from the printer. The
printer will not proceed unless the
signal is high. Can be set high with
SelecType.
Data set ready. This pin indicates
that the computer is ready to
receive data from the printer. Can
be set high with SelecType.
Signal ground. This pin provides a
ground for all the signal lines.
Data carrier detect. Always
ignored.
Data terminal ready. This pin
indicates whether or not the printer
is ready to receive data. If the
printer ready protocol is not
selected, this pin is always high
(i.e. the printer is ready to receive
data). If printer ready protocol is
selected, the printer can accept
data when the pin level is high, and
cannot accept data when the pin
level is low. When the DTR signal
goes low the host computer must
stop sending data within 128
characters. Can be set high or low
with SelecType.
A-14 Technical Specifications