NI PXI-6254 is an M Series multifunction data acquisition module designed for PXI-based measurement and control systems. NI’s device specifications identify it as “NI 6254 — M Series Data Acquisition: 32 AI, 1.25 MS/s, 48 DIO,” making it a primary DAQ hardware module rather than an accessory. Within the 6254 family, NI distinguishes PXI-6254 from the PCI-6254 bus variant, so the PXI form factor should be treated as the specific SKU family context rather than assumed interchangeable with PCI versions.
The module provides 16 differential or 32 single-ended analog input channels with 16-bit ADC resolution. Official NI specifications list a maximum single-channel sample rate of 1.25 MS/s and a maximum aggregate multichannel rate of 1.00 MS/s. Supported analog input ranges are ±0.1, ±0.2, ±0.5, ±1, ±2, ±5, and ±10 V, and NI specifies 1.7 MHz small-signal bandwidth for the device.
For mixed-signal tasks, PXI-6254 includes 48 digital I/O lines total: 32 on Port 0 and 16 additional lines on PFI/P1/P2, along with two 32-bit counter/timers. The hardware uses two 68-pin VHDCI connectors, and NI’s cable and accessory compatibility documentation confirms the PXI-6254 uses a dual-connector VHDCI arrangement within the 62xx multifunction I/O family.
