Star Micronics NX-15 user manual Serial Interface Specifications

APPENDIX G

SERIAL INTERFACE

SPECIFICATIONS

This printer provides a very flexible RS232C serial interface as an option. It can communicate at rates from 150 to 19,200 baud (bits per second) and supports four different kinds of hand- shaking. This interface can also function as a 20mA current loop interface. The operating specifications of the interface are as follows:

Data transfer rate:	150-19200
Word length:	1 start bit
	7 or 8 data bits
	Odd, even or no parity
	1 or 2 stop bits
Signal levels:	Mark or logical 1, –3 to –15 volts or
	current ON
	Space or logical O, +3 to +15 volts or
	current OFF
Handshaking:	Serial BUSY, 1 byte mode
	Serial BUSY, 1 block mode
	ACK mode
	XON/XOFF mode

Note: 19200 baud can be used only with an RS232C interface; it cannot be used with a 20mA current loop interface.

The optional board has a DB-25 female connector to connect to a computer. The functions of the pins are summarized in Table G-1.

CONFIGURING THE SERIAL INTERFACE

The DIP switch on the serial interface board controls the con- figuration of the serial interface. Table G-2 describes the func- tions of the individual switches in DIP switch.