Epson ActionLaser User Manual - Page 202

Signal, Description, Serial interface pin assignments, Technical Specifications

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Inferface Specifications Serial interface pin assignments The serial interface connector pin assignments and a description of the interface signals are shown in the table below. The direction of signals is given relative to the printer. Signal Pin Signal 1 FG 2 TD 3 RD 4 RTS 5 CTS 6 DSR 7 SG 9 SD RS-232C RS-422A Direction * * * OUT * (RD-) IN invert * OUT * IN * IN * (SD-) invert OUT Description Frame ground. Safety ground line. Transmit data. This pin transmits serial data from the printer to the computer. Receive data. This pin transmits serial data from the computer to the printer. Request to send. This pin is HIGH when power is on. Clear to send. This pin indicates that the computer is ready to receive data from the printer. Data set ready. This pin indicates that the computer is ready to communicate. Signal ground. This pin provides a ground for all the signal lines. Send data. This pin sends serial data from the printer to the computer. Signal level is RS-422A. B-12 Technical Specifications

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Inferface Specifications
Serial interface pin assignments
The serial interface connector pin assignments and a description of
the interface signals are shown in the table below. The direction of
signals is given relative to the printer.
Signal
Pin
Signal
RS-232C
RS-422A
Direction
1
FG
*
*
2
TD
*
OUT
3
RD
*
(RD-)
IN
invert
4
RTS
*
OUT
Description
Frame ground. Safety
ground line.
Transmit data.
This pin transmits serial
data from the printer to
the computer.
Receive data.
This pin transmits serial
data from the computer to
the printer.
Request to send. This pin
is HIGH when power is on.
5
CTS
*
IN
Clear to send. This pin
indicates that the computer
is ready to receive data
from the printer.
6
DSR
*
IN
Data set ready. This pin
indicates that the computer
is ready to communicate.
7
SG
*
Signal ground. This pin
provides a ground for all the
signal lines.
9
SD
(SD-)
OUT
Send data. This
invert
pin sends serial data from
the printer to the computer.
Signal level is RS-422A.
B-12
Technical Specifications