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5 Serial Interface (optional)

When using the serial interface, the optional Serial-Parallel Converter must be connected to the printer.

5-1. General Specifications

Item Specifications

Interface RS-232C level

Synchronization System Asynchronous

Baud rate 150 - 19,200 bits per second (BPS) [selectable]

150, 300, 600, 1200, 2400, 4800, 9600, 19200 BPS

Word length

Start bit: 1 bit

Data bit: 7 or 8 bits (selectable)

Parity bit: Odd, Even or None (selectable)

Stop bit: More then 1bit length

Signal polarity

Mark: Logic “1” (–3V to –15V)

Space: Logic “0” (+3V to +15V)

Handshaking DTR

XON/XOFF

ETX/ACK

Data buffer 8KB (standard)

5-2. Connector Signal and Functional Descriptions

Pin No. Signal name Direction Function

1 GND —

2 TXD OUT

3 RXD IN

4 RTS OUT

5 CTS —

6NC

7 GND —

8~10 NC

11 RCH OUT

12~19 NC

20 DTR OUT

21~25 NC

Printer chassis ground.

This pin carries data from the printer.

This pin carries data to the printer.

Always space.

This signal is space when the computer is ready to send data.

The printer does not check this pin.

Unused.

Signal ground.

Unused.

The printer sets this signal to space when it is ready to receive data.

This line carries the same signal as pin 20.

Unused.

The printer sets this signal to space when it is ready to receive data.

Unused.

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