LabJack U3 uses a DB15 connector for analog and digital I/O connections providing 16 configurable digital/analog lines, two analog outputs, and USB data acquisition at up to 50 kS/s for lab automation.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | FIO0 | Flexible I/O channel 0 analog or digital | ADC |
| 2 | FIO1 | Flexible I/O channel 1 | ADC |
| 3 | FIO2 | Flexible I/O channel 2 | ADC |
| 4 | FIO3 | Flexible I/O channel 3 | ADC |
| 5 | FIO4 | Flexible I/O channel 4 | ADC |
| 6 | FIO5 | Flexible I/O channel 5 | ADC |
| 7 | FIO6 | Flexible I/O channel 6 | ADC |
| 8 | FIO7 | Flexible I/O channel 7 | ADC |
| 9 | GND | Ground | GND |
| 10 | DAC0 | Analog output 0 | ADC |
| 11 | DAC1 | Analog output 1 | ADC |
| 12 | VS | Supply voltage 5V | PWR |
| 13 | GND | Ground | GND |
| 14 | SDA | I2C data | BUS |
| 15 | SCL | I2C clock | BUS |