II. Model Interpretation

PXI: 3U single slot, standard PXI bus (compatible with PXIe mixed slots)

6259: High-density high-speed version of the M series, 32AI/4AO/48DIO, 16-bit, 1.25 MS/s

M series: Multi-function, high-speed sampling + multi-channel I/O + synchronous control

Part number: 779119-01, 779632-01

Status:停产；

III. Technical Parameters (25℃)

1. Analog Input (AI)

Channels： 32 single-ended / 16 differential (software selectable)

Resolution: 16 bits (no bit loss)

Sampling rate: 1.25 MS/s per channel， 1 MS/s for all channels

Range： ±0.1/±0.2/±0.5/±1/±2/±5/±10 V (programmable)

Input impedance： >10 GΩ || 100 pF

Overvoltage protection： ±11 V (signal + common mode)

CMRR： 100 dB (DC–60 Hz)

FIFO： 4 k samples， supports 6 channels of DMA

2. Analog Output (AO)

Channels： 4

Resolution： 16 bits

Update rate： 2.86 MS/s (per channel)

Range： ±10 V， ±5 V (software selectable)

Drive： ±5 mA

Stabilization time： 2 μs (full scale)

3. Digital I/O (DIO)

Configuration： 48 bidirectional (5 V TTL/CMOS)

Rate： Up to 10 MHz (hardware timing)

Protection： Partial channels support ±20 V overvoltage input

Function： Anti-jitter filtering， programmable input/output， related digital I/O

4. Counter / Timer

Quantity： 2 32-bit (80 MHz base time)

Function： Event counting， frequency / period， pulse output， quadrature encoding (X1/X2/X4)

FIFO： 2 samples

5. Physical and Environmental

Size： 3U single slot (22×124×126 mm)

Operating temperature： 0～55℃

Power consumption： Approximately 10 W

Calibration： NI-MCal technology， recommended every 2 years once

IV. Interface and Communication Configuration

Front panel interface： 2×68-pin VHDCI female connector (with SHC68-68-EPM cable， CB-68LP wiring box) NI

Bus： PXI (PCI， trigger， 10 MHz reference clock， RTSI)

Driver： NI-DAQmx， supports LabVIEW， Python， C#， TestStand

Synchronization： PXI trigger bus / RTSI， multi-module synchronization

PFI lines： 8 programmable function inputs for triggering and timing routing

V. Core Functions

High-density high-speed acquisition： 32AI + 1.25 MS/s + 16 bits， balancing the number of channels and rate， suitable for multi-channel dynamic signals.

4 channels of high-speed analog output： 2.86 MS/s update rate， supports high-speed closed-loop control and waveform generation.

48 channels of synchronous digital I/O： Hardware timing up to 10 MHz， suitable for high-speed logic control and timing synchronization.

High-precision measurement： NI-PGIA2 amplifier + low drift， maintaining 16-bit accuracy across all channels at full speed.

Multifunction integration： 32AI + 4AO + 48DIO + 2 counters， one module completes multi-parameter measurement / control / timing.

VI. Application Scenarios Multi-channel mixed-signal testing: synchronous acquisition + control of vibration, pressure, strain, voltage/current.

Industrial automation ATE: PCB functional testing, multi-station synchronous calibration, component parameter testing.

Power electronics and motor control: multi-phase voltage/current acquisition + 4-channel control output, suitable for frequency converter/inverter testing.

Research and laboratory automation: medium-high density high-speed data recording, sensor calibration, precise closed-loop control.

General multi-parameter measurement and control: system for simultaneous acquisition of 32 analog + 48 digital + counting signals.

VII. Installation and Maintenance Instructions

Installation and Power On

Disconnect the card when power is off, and ensure the chassis is reliably grounded; after power-on, NI-DAQmx self-checks and preheats for 15 minutes.

Operating Temperature: 0–55℃. Keep the air duct unobstructed and avoid blocking the fan.

Wiring and Operation

Analog input uses differential shielded twisted pair to reduce common-mode interference; input voltage ≤ ±11 VNI.

Avoid frequent plugging and unplugging of the dual 68-pin VHDCI interface; it is recommended to use the CB-68LP wiring box; pay attention to level matching for digital I/O.

High-speed signals should be routed away from interference sources such as power supplies and motors, and use impedance-matched cables.

Daily Maintenance and Calibration

It is recommended to conduct a traceable calibration once every 2 years; built-in self-calibration compensates for temperature drift.

Keep interfaces clean, prevent dust accumulation during long-term inactivity; avoid strong vibrations and condensation.