II. Model Interpretation

PXI: 3U single slot, PXI bus, compatible with PXI/PXIe chassis.

6225: M series high-density model, 16-bit, 250 kS/s, 80AI/2AO.

M series: Multi-function, balancing channel density and versatility.

Part number: 779295-01 (standard).

Status:halt production； alternative model： PXIe-6345NI.

III. Technical Parameters (25℃)

1. Analog Input (AI)

Channels： 80 single-ended / 40 differential (software selectable) NI

Resolution： 16 bits (no bit loss) NI

Sampling rate： total 250 kS/s (multi-channel sharing) NI

Range： ±0.2 V， ±1 V， ±5 V， ±10 V (programmable)

Input impedance： >10 GΩ || 100 pF

Coupling： DC； overvoltage protection ±11 V (signal + common mode)

CMRR： 92 dB (DC–60 Hz)

FIFO： 8 k samples， supports DMA

2. Analog Output (AO)

Channels： 2

Resolution： 16 bits

Range： ±10 V

Update rate： 833 kS/s (per channel)

Drive： ±5 mA

3. Digital I/O (DIO)

Channels： 24 bidirectional TTL/CMOS

Level： high ≥ 2.4 V， low ≤ 0.4 V

Rate： maximum 1 MHz (hardware timing)

4. Counter / Timer

Quantity： 2 32-bit (80 MHz base)

Function： event counting， frequency / period， pulse output， edge triggering

5. Physical and Environmental

Size： 3U single slot (approx. 22×124×126 mm)

Operating temperature： 0～55℃

Power consumption： approximately 7 W (PXI backplane power supply)

Calibration： recommended annual 1-time traceability calibration

IV. Interface and Communication Configuration

Front panel interface： 100-pin SCSI-II female connector (with SH100-100-EP cable， CB-100 wiring box)

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

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

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

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

V. Core Functions

Ultra-high density analog input： 80 single-ended / 40 differential， meeting requirements for synchronous acquisition of large-scale sensors.

16-bit high precision： high resolution， excellent dynamic range， suitable for precise measurement of small signals.

Flexible channel configuration： single-ended / differential software switching， suitable for different interference environments and sensor types.

Integrated multi-function： AI + AO + DIO + counter， one module completes measurement / control / timing.

SCXI/SCC interface compatibility： expandable for high voltage， isolation， strain， etc. signal conditioning.

VI. Application Scenarios

Industrial automation large-scale testing： synchronous acquisition of temperature， pressure， voltage at multiple nodes in production lines.

Research laboratory multi-parameter monitoring： environmental monitoring， biomedical， material testing， etc. multi-sensor systems.

Electronic manufacturing ATE： multi-channel function testing and parameter measurement for PCB， components.

Structural health monitoring： long-term monitoring of strain / vibration at multiple points of bridges， buildings， large equipment.

Process control and data recording： multi-parameter monitoring in chemical， energy， water treatment， etc. industrial processes.

VII. Usage and Maintenance Instructions

Installation and Power On Disconnect the card during power-off, and ensure the chassis is reliably grounded; after powering on, the 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

For analog input, use differential wiring (in strong interference environments), and use shielded twisted pair cables.

Input voltage should not exceed ±10 V; for 100-pin interface, avoid frequent plugging and unplugging, and it is recommended to be connected to a wiring box.

Multi-module synchronization: Share the PXI 10 MHz reference clock and trigger bus.

Daily maintenance and calibration

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

Keep the interface clean, prevent dust accumulation during long-term inactivity; keep away from strong vibration, condensation and strong electromagnetic interference.