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# 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
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|---------------------+-------+----------------------+-------|
| Breadboard | BB1 | Relay control output | J2 |
| | | (see pinout below) | |
|---------------------+-------+----------------------+-------|
| Opto-isolated input | J1 | | |
| (see pinout below) | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| J1 PINOUT |
|------------------------------------------------------------|
| Function | Pins | Function | Pins |
|-----------------------+------+----------------------+------|
| Channel 1 relay | 1 & | Channel 11 relay | 21 & |
| control | 2 | control | 22 |
|-----------------------+------+----------------------+------|
| Channel 2 relay | 3 & | Channel 12 relay | 23 & |
| control | 4 | control | 24 |
|-----------------------+------+----------------------+------|
| Channel 3 relay | 5 & | Channel 13 relay | 25 & |
| control | 6 | control | 26 |
|-----------------------+------+----------------------+------|
| Channel 4 relay | 7 & | Channel 14 relay | 27 & |
| control | 8 | control | 28 |
|-----------------------+------+----------------------+------|
| Channel 5 relay | 9 & | Channel 15 relay | 29 & |
| control | 10 | control | 30 |
|-----------------------+------+----------------------+------|
| Channel 6 relay | 11 & | Channel 16 relay | 31 & |
| control | 12 | control | 32 |
|-----------------------+------+----------------------+------|
| Channel 7 relay | 13 & | Ground | 33 & |
| control | 14 | | 34 |
|-----------------------+------+----------------------+------|
| Channel 8 relay | 15 & | +5V DC power | 35 & |
| control | 16 | | 36 |
|-----------------------+------+----------------------+------|
| Channel 9 relay | 17 & | +12V DC power | 37 & |
| control | 18 | | 38 |
|-----------------------+------+----------------------+------|
| Channel 10 relay | 19 & | Ground | 39 & |
| control | 20 | | 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 | JP1 | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
+------------------------------------------------------------+