March Products 120 III (PC620) user manual DIO Digital Input & Output, Write SD4, SD5

User Manual version 2503

B: DIO (Digital Input & Output)

The LIBRA III provides 2-channel digital input and output that can be used for the system’s simple automation control needs. The digital I/O can be configured to control the opening of a cash drawer or to sense the warning signal of an uninterrupted power system (UPS) or to do the store security control.

The DIO port address and pin definition is listed below; I/O Port address: 200H/208H By CMOS Setting

Read: SD0, SD1	DIO1
	RJ11
Write: SD4, SD5

1 2 3 4 5 6

		O 2 8							I	2 8H(WRITE)
	IO 206H(READ)								IO 206H(WRITE)
SD0	18				2		IN_0	SD4	3			2	OUT_0
			1Y1	1A1
SD1	16				4		IN_1			D1	Q1
	14		1Y2	1A2	6			SD5	4	D2	Q2	5	OUT_1
			1Y3	1A3					7			6
	12				8					D3	Q3
	9		1Y4	1A4	11				8			9
			2Y1	2A1					13	D4	Q4	12
	7		2Y2	2A2	13					D5	Q5
	5				15				14			15
			2Y3	2A3						D6	Q6
	3				17				17			16
			2Y4	2A4						D7	Q7
									18			19
				1G		1	-IOR206H			D8	Q8
	20				19			-IOW206H	11			20
			VDD	2G						CLK	VCC
					10				1			10
				GND						CLR	GND
			74LS244							74LS273

VCC5

VCC12

	4.7K
OUT_0
VCC5	IN_0
	IN_1
	4.7K
OUT_1	MOSFET N

1

2

3

4

5

6

DIO1

RJ11

6-114 LIBRA 120 III (PC620 Intel 815E)

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