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# DECISION COMPUTER INTERNATIONAL CO., LTD.
8 CHANNEL RELAY OUTPUT/PHOTO-ISOLATOR
Card Type Data acquisition
Chip Set NEC 8255
I/O Options Opto-isolated input and relay control output port
Data Bus 8-bit ISA
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label |
|---------------------------------------------------+--------|
| Opto-isolated input and relay control output port | CN1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CN1 PINOUT |
|------------------------------------------------------------|
| Function | Pin | Function | Pin |
|------------------------+-----+-----------------------+-----|
| Channel 1 relay open | 1 | Channel 4 relay open | 20 |
|------------------------+-----+-----------------------+-----|
| Channel 1 relay common | 2 | Channel 4 relay | 21 |
| | | common | |
|------------------------+-----+-----------------------+-----|
| Channel 1 relay closed | 3 | Channel 4 relay | 22 |
| | | closed | |
|------------------------+-----+-----------------------+-----|
| Channel 2 relay open | 4 | Channel 5 relay open | 23 |
|------------------------+-----+-----------------------+-----|
| Channel 2 relay common | 5 | Channel 5 relay | 24 |
| | | common | |
|------------------------+-----+-----------------------+-----|
| Channel 2 relay closed | 6 | Channel 6 relay open | 25 |
|------------------------+-----+-----------------------+-----|
| Channel 3 relay open | 7 | Channel 6 relay | 26 |
| | | common | |
|------------------------+-----+-----------------------+-----|
| Channel 3 relay common | 8 | Channel 7 relay open | 27 |
|------------------------+-----+-----------------------+-----|
| Channel 3 relay closed | 9 | Channel 7 relay | 28 |
| | | common | |
|------------------------+-----+-----------------------+-----|
| Channel 8 relay open | 10 | Ground | 29 |
|------------------------+-----+-----------------------+-----|
| Channel 8 relay common | 11 | Channel 1 negative | 30 |
|------------------------+-----+-----------------------+-----|
| Channel 1 positive | 12 | Channel 2 negative | 31 |
|------------------------+-----+-----------------------+-----|
| Channel 2 positive | 13 | Channel 3 negative | 32 |
|------------------------+-----+-----------------------+-----|
| Channel 3 positive | 14 | Channel 4 negative | 33 |
|------------------------+-----+-----------------------+-----|
| Channel 4 positive | 15 | Channel 5 negative | 34 |
|------------------------+-----+-----------------------+-----|
| Channel 5 positive | 16 | Channel 6 negative | 35 |
|------------------------+-----+-----------------------+-----|
| Channel 6 positive | 17 | Channel 7 negative | 36 |
|------------------------+-----+-----------------------+-----|
| Channel 7 positive | 18 | Channel 8 negative | 37 |
|------------------------+-----+-----------------------+-----|
| Channel 8 positive | 19 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| OPTO-ISOLATION OPTIONS |
|------------------------------------------------------------|
| Setting | JPxA | JPxB |
|------------------------+---------------------+-------------|
| Differential signals | Pins 1 & 2 closed | Pins 2 & 3 |
| (+ and -) | | closed |
|------------------------+---------------------+-------------|
| Single-ended signals | Pins 1 & 2 closed | Pins 1 & 2 |
| (+ and GND) | | closed |
|------------------------+---------------------+-------------|
| Single-ended signals, | Pins 2 & 3 closed | N/A |
| TTL levels | | |
|------------------------------------------------------------|
| Note:The exact locations of JP1A through JP8A and |
| JP1B through JP8B are unidentified. JP1A and JP1B |
| control the opto-isolation functions of channel 1. |
| The settings for JP2A through JP8A and JP2B through |
| JP8B are identical, controlling channels 2 through 8 |
| respectively. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | On | On | On | On | On | On | On | Off |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |008h | On | On | On | On | On | On | Off | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |010h | On | On | On | On | On | Off | On | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |014h | On | On | On | On | On | Off | On | Off |
|--+-----+------+------+------+------+-----+-----+-----+-----|
|ยป |2A8h | Off | On | Off | On | Off | On | Off | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3ECh | Off | Off | Off | Off | Off | On | Off | Off |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3F0h | Off | Off | Off | Off | Off | Off | On | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3F4h | Off | Off | Off | Off | Off | Off | On | Off |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3F8h | Off | Off | Off | Off | Off | Off | Off | On |
|--+-----+------+------+------+------+-----+-----+-----+-----|
| |3FCh | Off | Off | Off | Off | Off | Off | Off | Off |
|------------------------------------------------------------|
| Note: Over 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 512 to obtain |
| the correct memory address. (Off=1, On=0) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| The functions of the LEDs are unidentified. |
+------------------------------------------------------------+