Rose electronic Automatic Switch manual Appendix B Pinout Specifications

Appendix B: Pinout Specifications

Serial Models DB25 Female

Pin	Signal Name	Acronym	I/O	Description
2	Transmit data	TXD	Output	Serial data from port
3	Receive data	RXD	Input	Serial data to port
4	Request to send	RTS	Output	Always high
6	Data set ready	DSR	Input	Low inhibits transmit data
7	Signal ground	GND	Common
20	Terminal ready	DTR	output

Pin 20 is the hardware flow control output. Pin 6 is the hardware flow control input. Pin 6 has an internal pull-up to set it high when no signal is connected.

Parallel Models Centronics 36 Female

DB25 Female

C36F	DB25
Pin	Pin	Signal Name	Port 0	Port 1-8	Description
1	1	STROBE	output	input	Data transfer when pulsed low
2	2	DATA 0	output	input	Data LSB
3	3	DATA 1	output	input
4	4	DATA 2	output	input
5	5	DATA 3	output	input
6	6	DATA 4	output	input
7	7	DATA 5	output	input
8	8	DATA 6	output	input
9	9	DATA 7	output	input	Data MSB
10	10	ACK	input	output	Pulsed low for next transfer
11	11	BUSY	input	output	If high inhibits data flow
12	12	PAPER END	input	output	Input unused, low when output
13	13	SELECT OUT	input	output	Input unused, high when output
14	14	AUTOFEED	output	input	Input unused, output high
16		GROUND	--------	--------	Wired common all ports
19-30	18-25	GROUND	--------	--------	Wired common all ports
31	16	INITIAL	output	Input	Must be high to receive data
32	15	ERROR	Input	output	Input unused, high when output
33	-	GROUND	--------	--------	Wired common all ports
36	17	SELECT IN	output	input	Must be low to receive data

CARETAKER PLUS INSTALLATION AND OPERATIONS MANUAL

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