| I/O module #1 | A | pin 1-8 | MB1 ADC readout | 
| pin 9-15 | MB1 spy line switching | ||
| pin 17-24 | MB2 ADC readout | ||
| B | pin 1-8 | MB2 spy line switching | |
| pin 9-15 | MB3 ADC readout | ||
| pin 17-24 | MB3 spy line switching | ||
| C | pin 1-8 | MB4 ADC readout | |
| pin 9-15 | MB4 spy line switching | ||
| pin 17-24 | custom ADC readout | ||
| D | pin 1-4 | unassigned | |
| pin 5-14 | relay board West controls | ||
| pin 15-24 | relay board East controls | ||
| I/O module #2 | A | pin 1-24 | LV control | 
| B | pin 1-8 | LV control | |
| pin 9-24 | unassigned | ||
| C | pin 1-24 | unassigned | |
| D | pin 1-24 | unassigned | |
| I/O module #3 | A | chiller RS232 | |
| B | chiller RS232 | ||
| C | chiller RS232 | ||
| D | chiller RS232 | ||
 
  C-code for reading the Mother Board ADC's