Description
The National Instruments USB-6281 is a high-performance, PC-based Multifunction Data Acquisition (DAQ) device. It is designed to offer a wide range of features to meet the needs of various data acquisition applications.
The USB-6281 model comes with part numbers 780054-01, 780054-07, 780053-04, 780053-01, 780054-04, ensuring a range of options for different requirements. This model utilizes a USB interface, making it easily connectable to most modern computers without the need for complex setup procedures.
With 16 single-ended or 8 differential analog input channels, it provides the flexibility needed for various types of sensors and input signals. This device boasts an 18-bits ADC resolution, ensuring high precision in measurements.
For sampling rates, the USB-6281 offers a 625 kS/s maximum rate for a single channel and up to 500 kS/s for multiple channels, allowing for fast data acquisition. It is designed to protect against overvoltage with a protection of ±25 V when on and ±15 V when off. Additionally, it has an input current overvoltage protection of ±25 mA max per AI pin and an input bias current of ±100 pA.
The device also includes 2 analog output channels with a 16-bits DAC resolution, providing accurate and stable output signals. The output channel update rate ensures timely responses in control applications.
| Specification | Detail |
|---|---|
| Manufacturer | National Instruments |
| Model | USB-6281 |
| Category | PC-based Multifunction DAQ |
| Part Numbers | 780054-01, 780054-07, 780053-04, 780053-01, 780054-04 |
| Interface | USB |
| Analog Input Channels | 16 single-ended or 8 differential |
| ADC Resolution | 18-bits |
| Single Channel Sample Rate | 625 kS/s max |
| Multiple Channels Sample Rate | 500 kS/s max |
| Overvoltage Protection (On) | ±25 V |
| Overvoltage Protection (Off) | ±15 V |
| Input Current (Overvoltage) | ±25 mA max/AI pin |
| Input Bias Current | ±100 pA |
| Analog Output Channels | 2 |
| DAC Resolution | 16-bits |
| Output Channel Update Rate |


