NI USB-6351, X Series DAQ (16 AI, 24 DIO, 2 AO) (781440-01)

16 AI (16-Bit, 1.25 MS/s), 2 AO (2.86 MS/s), 24 DIO USB Multifunction I/O Device
The USB‑6351 offers analog I/O, digital I/O, and four 32‑bit counters/timers for PWM, encoder, frequency, event counting, and more. Onboard NI‑STC3 timing and synchronization technology delivers advanced timing functionality, including independent analog and digital timing engines and retriggerable measurement tasks. The USB‑6351 is well suited for a broad range of applications, from basic data logging to control and test automation. The included NI‑DAQmx driver and configuration utility simplify configuration and measurements.

Key product

Analog Input
- Channels : 8 differential or 16 single-ended
- Resolution : 16 bits
- Input Range : ±0.1 V to ±10 V
- Maximum Sample Rate : 1.25 MS/s (single channel), 1.00 MS/s (multichannel aggregate)
Analog Output
- Channels : 2
- Resolution : 16 bits
- Output Range : ±10 V, ±5 V, external reference
- Maximum Update Rate : 2.86 MS/s (1 channel), 2.00 MS/s (2 channels)
Digital I/O
- Channels : 24 (8 on P0, 16 on PFI/P1/P2)
- Voltage Levels : 0 to 5 V
- Direction Control : Programmable per terminal
Counters/Timers
- Number : 4
- Resolution : 32 bits
- Measurement Types : Pulse, pulse width, period, frequency, etc.
- Base Clocks : 100 MHz, 20 MHz, 100 kHz internal; external up to 25 MHz
- Input/Output : Gate, Source, A/B/Z inputs; gate, source, pulse outputs
Triggering and Synchronization
- Analog Triggers : Start, Reference, Pause, Sample Clock, Convert Clock
- Digital Triggers : Start, Pause, Sample Clock, Timebase
- PLL : Supports phase-locked loops with multiple reference clock locking frequencies.
Bus Interfaces
- USB : USB 2.0 Hi-Speed, DMA support
Environmental Conditions
- Operating Temperature : 0 to 50 °C (PCIe), 0 to 45 °C (USB)
- Operating Humidity : 10 to 90% RH, non-condensing

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