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16 CHANNEL RELAY OUTPUT/PHOTO-ISOLATOR

DECISION COMPUTER INTERNATIONAL CO., LTD.

16 CHANNEL RELAY OUTPUT/PHOTO-ISOLATOR

Card Type

Data acquisition

Chip Set

NEC 8255

I/O Options

Opto-isolated input port, relay control output port

Data Bus

8-bit ISA

CONNECTIONS

Function

Label

Function

Label

Breadboard

BB1

Relay control output (see pinout below)

J2

Opto-isolated input (see pinout below)

J1

   

J1 PINOUT

Function

Pins

Function

Pins

Channel 1 relay control

1 & 2

Channel 11 relay control

21 & 22

Channel 2 relay control

3 & 4

Channel 12 relay control

23 & 24

Channel 3 relay control

5 & 6

Channel 13 relay control

25 & 26

Channel 4 relay control

7 & 8

Channel 14 relay control

27 & 28

Channel 5 relay control

9 & 10

Channel 15 relay control

29 & 30

Channel 6 relay control

11 & 12

Channel 16 relay control

31 & 32

Channel 7 relay control

13 & 14

Ground

33 & 34

Channel 8 relay control

15 & 16

+5V DC power

35 & 36

Channel 9 relay control

17 & 18

+12V DC power

37 & 38

Channel 10 relay control

19 & 20

Ground

39 & 40

J2 PINOUT

Function

Pin

Function

Pin

Channel 1 negative

1

Channel 11 negative

21

Channel 1 positive

2

Channel 11 positive

22

Channel 2 negative

3

Channel 12 negative

23

Channel 2 positive

4

Channel 12 positive

24

Channel 3 negative

5

Channel 13 negative

25

Channel 3 positive

6

Channel 13 positive

26

Channel 4 negative

7

Channel 14 negative

27

Channel 4 positive

8

Channel 14 positive

28

Channel 5 negative

9

Channel 15 negative

29

Channel 5 positive

10

Channel 15 positive

30

Channel 6 negative

11

Channel 16 negative

31

Channel 6 positive

12

Channel 16 positive

32

Channel 7 negative

13

Ground

33

Channel 7 positive

14

Ground

34

Channel 8 negative

15

+5V DC power

35

Channel 8 positive

16

+5V DC power

36

Channel 9 negative

17

+12V DC power

37

Channel 9 positive

18

+12V DC power

38

Channel 10 negative

19

Ground

39

Channel 10 positive

20

Ground

40

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Factory configured - do not alter

JP1

Unidentified

INTERRUPT

Setting

JP2/A

JP2/B

JP2/C

JP2/D

JP2/E

JP2/F

IRQ2

Closed

Open

Open

Open

Open

Open

IRQ3

Open

Closed

Open

Open

Open

Open

IRQ4

Open

Open

Closed

Open

Open

Open

IRQ5

Open

Open

Open

Closed

Open

Open

IRQ6

Open

Open

Open

Open

Closed

Open

IRQ7

Open

Open

Open

Open

Open

Closed

Disabled

Open

Open

Open

Open

Open

Open

BASE I/O ADDRESS

Setting

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

SW1/8

 

000h

On

On

On

On

On

On

On

On

 

004h

Off

On

On

On

On

On

On

On

 

008h

On

Off

On

On

On

On

On

On

 

00Ch

Off

Off

On

On

On

On

On

On

 

010h

On

On

Off

On

On

On

On

On

1A0h

On

Off

Off

On

Off

On

On

On

 

3ECh

Off

Off

On

Off

Off

Off

Off

Off

 

3F0h

On

On

Off

Off

Off

Off

Off

Off

 

3F4h

Off

On

Off

Off

Off

Off

Off

Off

 

3F8h

On

Off

Off

Off

Off

Off

Off

Off

 

3FCh

Off

Off

Off

Off

Off

Off

Off

Off

Note: A total of 255 base address settings are available. The switches are a binary representation of the decimal memory addresses. SW1/1 is the Most Significant Bit and switch SW1/8 is the Least Significant Bit. The switches have the following decimal values: SW1/1=512, SW1/2=256, SW1/3=128, SW1/4=64, SW1/5=32, SW1/6=16, SW1/7=8, SW1/8=4. Turn off the switches and add the values of the switches that are off to obtain the correct memory address. (Off=1, On=0)

DIAGNOSTIC LED(S)

The function of the LED D33 is unidentified.