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 | DIN2+ | High-speed differential input #2 – Positive pole |
| 3 | IIN1+ | Isolated input #1 – Positive pole |
| 4 | IIN3- | Isolated input #3 – Negative pole |
| 5 | IIN4- | Isolated input #4 – Negative pole |
| 6 | IOUT2- | Isolated contact output #2 – Negative pole |
| 7 | IOUT4- | Isolated contact output #4 – Negative pole |
| 8 | +5V | +5V Power output |
| 9 | GND | Ground |
| 10 | GND | Ground |
| 11 | DIN2- | High-speed differential input #2 – Negative pole |
| 12 | IIN1- | Isolated input #1 – Negative pole |
| 13 | IIN2+ | Isolated input #2 – Positive pole |
| 14 | IIN3+ | Isolated input #3 – Positive pole |
| 15 | IIN4+ | Isolated input #4 – Positive pole |
| 16 | IOUT2+ | Isolated contact output #2 – Positive pole |
| 17 | IOUT4+ | Isolated contact output #4 – Positive pole |
| 18 | GND | Ground |
| 19 | DIN1- | High-speed differential input #1 – Negative pole |
| 20 | DIN1+ | High-speed differential input #1 – Positive pole |
| 21 | IIN2- | Isolated input #2 – Negative pole |
| 22 | IOUT1- | Isolated contact output #1 – Negative pole |
| 23 | IOUT1+ | Isolated contact output #1 – Positive pole |
| 24 | IOUT3- | Isolated contact output #3 – Negative pole |
| 25 | IOUT3+ | Isolated contact output #3 – Positive pole |
| 26 | +12V | +12 V Power output |