PXI-2594 National Instruments

PXI-2594 National Instruments Power Board

Product  Description：

National Instruments (NI) Power Boards, often integrated into PXI chassis, CompactRIO storage systems, or industrial controller backplanes, are high-efficiency power management modules. These boards are responsible for regulating, filtering, and distributing clean DC power from a main input source to sensitive measurement circuitry, data acquisition modules, and FPGA processors. They are engineered to minimize electrical noise and thermal dissipation, ensuring the highest level of measurement accuracy for instrumentation systems.

Product Parameters

The technical parameters of National Instruments Power Boards focus on voltage stability, ripple suppression, and power density:

• Input Voltage Range: Commonly accepts wide-range DC inputs such as 9V to 30V DC for mobile/embedded applications, or standard AC grid inputs for benchtop chassis systems.

• Internal DC Rails: Delivers precisely regulated multiple output voltages including 3.3V, 5V, 12V, and -12V DC to power different layers of backplane electronics.

• Output Ripple and Noise: Exceptionally low ripple voltage, typically under 50 millivolts peak-to-peak, to prevent high-frequency noise from bleeding into analog measurement channels.

• Efficiency Rating: Advanced synchronous rectification topologies achieve energy conversion efficiencies up to 92 percent, reducing internal cabinet heat buildup.

• Power Capacity: Continuous power output ratings generally range from 30W for compact embedded systems to over 300W for multi-slot instrumentation chassis.

• Overvoltage Protection: Integrated hardware clamping thresholds that trigger safety shutdowns if output rails exceed 115 percent of their nominal voltage.

Product Advantages

NI Power Boards provide critical advantages for high-performance testing and measurement environments:

• Low Electromagnetic Interference: Designed with extensive multi-layer shielding and optimized component placement to meet strict automated test equipment (ATE) emissions standards.

• Intelligent Power Monitoring: Features onboard telemetry circuits that track real-time voltage levels, current draw, and temperature statistics, accessible via NI software tools like LabVIEW.

• Power Sequencing Control: Automatically manages the startup and shutdown timing of different voltage rails to prevent latch-up conditions in high-speed FPGAs and processors.

• Transient Response Resilience: Capable of recovering rapidly from sudden current spikes caused by high-speed digital switching without dropping voltage regulation.

• Ruggedized Thermal Design: Utilizes internal copper thermal planes and structural heatsinks to dissipate heat efficiently, eliminating the need for loud cooling fans in lower-wattage deployments.

Product Applications

These power boards serve as the foundation for stable data acquisition across numerous engineering fields:

• Automated Test Equipment: Powering PXI instrumentation stacks used for semiconductor validation, circuit board testing, and consumer electronics quality control.

• Embedded Control and Monitoring: Providing reliable power to CompactRIO systems deployed on heavy machinery, wind turbines, and smart grid monitoring nodes.

• Automotive Research: Distributing power within in-vehicle data logging systems used for advanced driver-assistance systems (ADAS) testing and crash validation.

• Aerospace and Defense: Supporting telemetry and hardware-in-the-loop (HIL) simulation racks where continuous power uptime is mission-critical.

• Laboratory Instrumentation: Activating high-precision analog input and output chassis used in university research and structural health monitoring.

Important Precautions

To preserve the accuracy of adjacent measurement hardware and prevent power failure, the following instructions must be observed:

• Input Polarity Verification: Always double-check the polarity of the DC input wiring before applying power. Reverse polarity can cause terminal damage to the input protection diodes.

• Common-Mode Noise Grounding: Ensure the chassis ground point of the power board is tied directly to a clean instrument earth ground. Inadequate grounding will compromise the noise floor of nearby analog-to-digital converters.

• Clearance and Airflow: Maintain the specified mechanical clearance around the power board vents. Blocking airflow will elevate the internal temperature, shortening the lifespan of the electrolytic filtering capacitors.

• Derating for Temperature: When operating the system in ambient environments above 50 degrees Celsius, reduce the maximum allowable power draw according to the official thermal derating curves.

• Safe Discharge Time: High-capacity capacitors on the board retain electrical energy for a short duration after power-off. Wait at least 60 seconds before removing the board or altering internal connections to avoid minor shocks or component damage.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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