NI DAQ 68-pin connectors (SHC68-68-EPM) are the standard interface on National Instruments data acquisition devices, providing 32 analog input channels, 2 analog outputs, and 24 digital I/O lines.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | AI0 | Analog input channel 0 | ADC |
| 2 | AI8 | Analog input channel 8 | ADC |
| 3 | AI GND | Analog input ground | GND |
| 34 | AI1 | Analog input channel 1 | ADC |
| 35 | AI9 | Analog input channel 9 | ADC |
| 56 | AO0 | Analog output 0 | ADC |
| 57 | AO1 | Analog output 1 | ADC |
| 63 | D GND | Digital ground | GND |
| 64 | +5V | 5V supply | PWR |
| 65 | DIO0 | Digital I/O bit 0 | I/O |
| 66 | DIO1 | Digital I/O bit 1 | I/O |
| 67 | DIO2 | Digital I/O bit 2 | I/O |
| 68 | DIO3 | Digital I/O bit 3 | I/O |