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GENERAL SPECIFICATIONS
5. Serial Interface (option)
When using the serial interface, the optional Serial-Parallel Converter must be connected with the printer.
5-1. Genereal Specifications
Item Specifications
Interface RS-232C level
Synchronization System Asynchronous
Baud rate 150 - 19,200 bit 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 1 bit 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 Signals 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’s chassis ground.
This pin carries data from the printer.
This pin carries data to the printer.
Always space.
This pin is space when the computer is ready to send data.
This printer does not check this pin.
Unused.
Signal ground.
Unused.
This printer turns this pin space when it is ready to receive data.
This line carries the same signal as pin 20.
Unused.
The printer turns this pin space when it is ready to receive data.
Unused.
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