External I/O Connector
Applies to: 
Connector description
| Property | Value |
|---|---|
| Name | External I/O |
| Type | 26-pin 3-row high-density female sub-D connector |
| Location | Card bracket |
| Usage | General purpose I/O and power output |
Pin assignments
| Pin | Signal | Usage |
|---|---|---|
| 1 | GND | Ground |
| 2 | DIN2A+ | Channel A - High-speed differential input #2 – Positive pole |
| 3 | IIN1A+ | Channel A - Isolated input #1 – Positive pole |
| 4 | DIN1B- | Channel B - High-speed differential input #1 – Negative pole |
| 5 | DIN2B- | Channel B - High-speed differential input #2 – Negative pole |
| 6 | IIN1B- | Channel B - Isolated input #1 – Negative pole |
| 7 | IOUT1B- | Channel B -Isolated contact output #1 – Negative pole |
| 8 | +5V | +5V Power output |
| 9 | GND | Ground |
| 10 | GND | Ground |
| 11 | DIN2A- | Channel A - High-speed differential input #2 – Negative pole |
| 12 | IIN1A- | Channel A - Isolated input #1 – Negative pole |
| 13 | IIN2A+ | Channel A - Isolated input #2 – Positive pole |
| 14 | DIN1B+ | Channel B - High-speed differential input #1 – Positive pole |
| 15 | DIN2B+ | Channel B - High-speed differential input #2 – Positive pole |
| 16 | IIN1B+ | Channel B - Isolated input #1 – Positive pole |
| 17 | IOUT1B+ | Channel B - Isolated contact output #1 – Positive pole |
| 18 | GND | Ground |
| 19 | DIN1A- | Channel A - High-speed differential input #1 – Negative pole |
| 20 | DIN1A+ | Channel A - High-speed differential input #1 – Positive pole |
| 21 | IIN2A- | Channel A - Isolated input #2 – Negative pole |
| 22 | IOUT1A- | Channel A - Isolated contact output #1 – Negative pole |
| 23 | IOUT1A+ | Channel A - Isolated contact output #1 – Positive pole |
| 24 | IIN2B- | Channel B - Isolated input #2 – Negative pole |
| 25 | IIN2B+ | Channel B - Isolated input #2 – Positive pole |
| 26 | +12V | +12 V Power output |