PXI-4070 （778274-01） National Instruments

PXI-4070 （778274-01） National Instruments Power Board

Product  Description：

National Instruments (NI) Power Boards, often integrated within PXI chassis, CompactRIO controller slots, or custom industrial test systems, are high-performance power management and distribution assemblies. These boards are specifically engineered to deliver clean, regulated, and isolated electrical energy to sensitive data acquisition hardware, instrumentation modules, and embedded controllers. By minimizing electrical noise and managing thermal dissipation, they ensure the precision and accuracy of high-speed measurements.

Product Parameters

The technical characteristics of National Instruments Power Boards focus on voltage stability, efficiency, and strict instrumentation-grade power delivery:

• Input Voltage Range: Supports standard industrial DC inputs, typically 9V DC to 30V DC for compact systems, or interfaces directly with AC-DC backend supplies in larger chassis.

• Output Voltage Rails: Synchronously delivers multiple highly regulated DC outputs, such as 3.3V, 5V, 12V, and -12V, required to power internal logic and analog circuitry.

• Ripple and Noise: Exceptionally low ripple voltage, often maintained under 50 millivolts peak-to-peak, to prevent power supply noise from degrading analog measurement accuracy.

• Conversion Efficiency: Utilizes high-efficiency switching topologies paired with low-dropout (LDO) regulators, achieving overall power efficiency ratings between 88 percent and 94 percent.

• Dielectric Isolation: Built-in galvanic isolation, often rated up to 1000V AC or higher, between the main power input and the sensitive measurement backplane.

• Power Density: High-current handling capacity within a minimal structural footprint, often optimized for slot-constrained automated test equipment (ATE) racks.

Product Advantages

NI Power Boards are highly regarded in automated testing and control due to their precision engineering and rugged design:

• Instrumentation-Grade Power Cleanliness: Unlike standard industrial power supplies, these boards prioritize minimal electromagnetic interference (EMI), ensuring that nearby analog-to-digital converters achieve their full rated bit resolution.

• Smart Power Sequencing: Automatically manages the power-up and power-down sequence of different voltage rails, protecting sensitive FPGAs and processors from latch-up conditions or damage during startup.

• Hardware-Level Protection Suite: Features integrated, fast-acting overvoltage protection (OVP), overcurrent protection (OCP), and overtemperature shutdown mechanisms to protect expensive downstream instrumentation modules.

• Environmental Ruggedness: Built with industrial-grade components capable of withstanding extreme vibration and operating reliably in temperatures ranging from -40°C to 70°C, making them ideal for field deployments.

• Intelligent Diagnostic Feedback: Integrates directly with NI system management software, allowing real-time monitoring of rail voltages, current draw, and board temperature for predictive maintenance.

Product Applications

These power boards serve as the foundational energy baseline for high-precision testing, measurement, and control applications:

• Automated Test Equipment (ATE): Providing stable power to multi-slot test chassis used in semiconductor validation, aerospace functional testing, and consumer electronics production lines.

• Embedded Control and Monitoring: Supplying reliable energy to CompactRIO or custom embedded systems deployed in rugged environments like wind turbines, heavy machinery, and power grids.

• Laboratory Instrumentation: Powering high-resolution modular instruments, such as digitizers, signal generators, and digital multimeters, where power fluctuations would ruin test data.

• Automotive Research and Testing: Supporting in-vehicle data acquisition systems used for hardware-in-the-loop (HIL) testing and crash-test data logging.

• Defense and Aerospace Systems: Delivering the specialized, mission-critical power required for field-deployed telemetry systems and radar signal processing racks.

Important Precautions

To maintain the safety, precision, and longevity of the power board and attached system components, the following instructions must be implemented:

• Strict Grounding Guidelines: Maintain a low-impedance connection between the power board's ground terminal and the main chassis earth ground. Improper grounding will introduce ground loops, which introduce massive noise into measurement channels.

• Capacitor Discharge Hazard: High-capacity onboard filters can retain significant electrical energy after power is removed. Wait at least three minutes after turning off the system before handling the board or changing wiring connections.

• Load Balancing Verification: Ensure that the total current drawn across all output rails does not exceed the maximum aggregate wattage specification of the board. Overloading a single rail can trigger a system-wide shutdown.

• Adequate Airflow and Cooling: These boards generate localized heat during heavy power conversion. Ensure that the chassis fan filters are clean and that air vents are completely unobstructed to allow proper forced-convection cooling.

• Avoid Hot-Plugging: Never insert or remove the power board or any adjacent instrumentation modules while the main power source is switched on. Doing so can cause transient voltage spikes that may destroy sensitive CMOS components.

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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