Star Micronics SP300 Series manual Interface Specifications, To Installation Manual

2. SERIAL INTERFACE

2-1. Interface Specifications

1 Data transmission method:	Asynchronous serial interface
2 Baud rate:	Selectable from 150, 300, 600, 1200,
	2400, 4800, 9600, 19200 (Twin Head
	only) bps (Refer to Installation
	Manual.)
3 Word length	Start bit: 1 bit
	Data bit: 7 or 8 bits (selectable. Refer
	to Installation Manual.)
	Parity bit: Odd, even or none
	(selectable. Refer to Installation
	Manual.)
	Stop bit: 1 or 2 bit length
4 Signal polarity	RS-232C (Standard feature)
	MARK : Logic “1”(–3V to –25V)
	SPACE : Logic “0” (+3V to +25V)
	Current loop (optional)
	MARK : Logic “1”(current ON)
	SPACE : Logic “0” (current OFF)
	RS-422A (Optional)
	MARK : Logic “1”
	A is –0.2V or less than B
	SPACE : Logic “0”
	A is 0.2V or more than B

Mark [1]

Space [0]

	b0	b1	b2	b3		b4	b5	b6	(b7)
A					B					C	D

A: Start bit

B: Data bits

C: Vertical parity bit

D: Stop bit

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