Epson ActionLaser User Manual - Page 203

Technical Specifications B-13, Inferface Specifications

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Inferface Specifications Signal Pin 10 Signal SD RS-232C RS-422A (SD+) noninvert Direction OUT 11 REV * OUT 18 RD (RD+) IN 20 DTR * OUT 25 +5V DC * - Description Send data. This pin sends serial data from the printer to the computer. Signal level is RS-422A. Same as DTR. Receive data. This pin transmits serial data from the computer to the printer. Signal level is RS-422A. 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 busy. Not a signal, but a +5V power supply output. Maximum of 300mA. * Signal is operational for the interface. Technical Specifications B-13

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Inferface Specifications
Signal
Pin
10
Signal
SD
11
18
REV
RD
(RD+)
IN
20
DTR
25
+5V DC
RS-232C
RS-422A
Direction
Description
*
*
*
(SD+)
non-
invert
* Signal is operational for the interface.
OUT
OUT
Same as DTR.
OUT
—
Send data. This
pin sends serial
data from the printer to
the computer. Signal level
is RS-422A.
Receive data. This pin
transmits serial data from
the computer to the printer.
Signal level is RS-422A.
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 busy.
Not a signal, but a +5V
power supply output.
Maximum of 300mA.
Technical Specifications B-13