KYOCERA FS-1010 User Manual download pdf (Page 168)

C-9

FS-1010

Serial interface signals

The following table provides details for the signals used on the serial interface board.

Signal Meaning

FG (Pin 1) This pin is connected directly to the printer frame.

TxD (Pin 2) RS-232C only: This output carries asynchronous data sent by the printer to

the computer. It is used mainly in handshaking protocols.

RxD/RDA (Pin 3) This input carries serial asynchronous data sent by the computer to the

printer. In RS-422A, this carries the inverted differential data (RDA).

RTS (Pin 4) This output is always held high (above 3 V).

CTS (Pin 5) Unused.

DSR (Pin 6) Unused.

SG (Pin 7) All signals can transmit between the printer and the host computer to send

each signals with a signal ground.

SDA (Pin 8, 9) This output transmits asynchronous inverted form of differential data from

the printer to the computer.

SDB (Pin 8, 10) This output carries asynchronous non-inverted form of differential data

from the computer to the printer.

DTR (Pin 20) This output is used as a buffer nearly-full handshake line. It is held high

(above 3 V) when the buffer can accept more data.

RS-232C interface voltage levels

The voltage levels of the RS-232C signals conform to EIA RS-232C specifications. FALSE is from

3 volts to 15 volts. TRUE is from -3 volts to -15 volts. Voltages between -3 volts and 3 volts are

undefined. The voltage levels of the RS-422A signals are equivalent to those of the RS-232C signals

except the signals used for transmission and reception.

RS-422A interface voltage levels

The interface signal voltage levels for RS-422A conforms with the EIA RS-422A standards. The

differential voltage ranges is from 200 mV to 6 V.

1 2 ... 163 164 165 166 167 168 169 170 171 172

No comments

KYOCERA FS-1010 User Manual Page 168