Star Micronics RS 232C Serial to Parallel Converter SPC-8K - Manual (Page 8)

6
TECHNICAL SPECIFICATIONS (INPUT SIDE)
General Specifications
Item Specifications
Interface RS-232C-level
Synchronization System Asynchronous
Baud rate 150, 300, 600, 1200, 2400, 4800,
9600, 19200 BPS (selectable)
Word length
Start bit: 1 bit
Data bits: 7 or 8 bits (selectable)
Parity bit: Odd, Even or None (selectable)
Stop bits: More than 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)
Connector Signal and Functional Descriptions
Pin NO. Signal name Direction Function
1 GND –
2 TXD OUT
3 RXD IN
4 RTS OUT
5 CTS —
6 NC
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.
The printer does not check this pin.
Unused.
Signal ground.
Unused.
This line carries the same signal as pin
20.
Unused.
The printer sets this pin to Space when
it is ready to receive data.
Unused.