SH68-68-S National Instruments

SH68-68-S National Instruments Power Board

Product  Description：

National Instruments (NI) Power Boards are specialized hardware assemblies engineered to deliver regulated, low-noise, and highly stable electrical energy to modular instrumentation and control systems, such as PXI, CompactRIO, or custom data acquisition chassis. These boards act as the core energy management hub, transforming raw input power into the precise voltage rails required by sensitive analog-to-digital converters, high-speed FPGAs, and conditioning circuitry. Designed to maintain signal integrity, NI power boards combine high power density with advanced electrical isolation.

Product Parameters

The technical configuration of an NI Power Board focuses on strict voltage regulation, multi-rail efficiency, and minimal ripple:

• Input Voltage Range: Configurable for standard industrial inputs including 9V DC to 30V DC for compact systems, and universal AC inputs (100V-240V AC) for benchtop or rackmount chassis.

• Multi-Rail Outputs: Simultaneously generates highly regulated DC rails, typically providing 3.3V, 5V, 12V, and -12V DC to power varied digital and analog modules.

• Voltage Output Ripple: Maintained at ultra-low levels, often under 50 millivolts peak-to-peak, to prevent high-frequency switching noise from distorting sensitive sensor measurements.

• Power Conversion Efficiency: Employs high-efficiency synchronous switching topologies achieving 88 percent to 94 percent efficiency, minimizing internal heat accumulation.

• Isolation Barrier: Built-in galvanic isolation between the input source and the internal backplane, often rated up to 60V DC continuous or 1000V AC transient breakdown.

• Output Current Capacity: Varies by system scale, ranging from 2A per rail for distributed controllers to over 30A combined current for high-slot-count PXI chassis.

Product Advantages

NI Power Boards are distinguished by their instrumentation-grade clean power output and integrated system health features:

• Instrumentation-Grade Signal Integrity: Engineered specifically to eliminate electromagnetic interference (EMI), ensuring that the power stage does not introduce noise into high-resolution analog measurement channels.

• Smart Power Monitoring: Integrates onboard telemetry circuits that continuously track output voltages, currents, and temperatures, sharing this diagnostic data directly with the system controller via LabVIEW software.

• Intelligent Load Balancing: Features dynamic response capabilities that maintain steady voltage regulation even during sudden, high-frequency current steps caused by high-speed FPGA processing.

• Compact Modular Footprint: Maximizes power density by using high-integration surface-mount components, allowing the board to fit into tight chassis enclosures without requiring external bulky transformers.

• Comprehensive Hardware Protection: Features immediate, hardware-level shutdown responses for overvoltage, overcurrent, short-circuit, and over-temperature faults before damage reaches expensive I/O modules.

Product Applications

These power boards are used across specialized engineering environments where clean power is essential for accurate testing and control:

• Automated Test Equipment (ATE): Providing the stable backbone power for high-volume manufacturing test stations checking consumer electronics or semiconductor devices.

• Aerospace and Defense Testing: Powering hardware-in-the-loop (HIL) simulators, telemetry recorders, and structural health monitoring systems where reliability is paramount.

• Automotive Research and Development: Distributing clean power to data acquisition systems used in vehicle crash testing, engine diagnostics, and electric vehicle battery characterization.

• Industrial Machine Vision: Powering the high-speed processing modules and camera interfaces used in automated sorting and product inspection lines.

• Academic and Scientific Research: Serving as the underlying power source for physics experiments, control system laboratories, and advanced signal processing setups.

Important Precautions

To preserve system calibration accuracy and ensure operator safety, the following operational constraints must be respected:

• Thermal Management and Clearance: Never obstruct the chassis cooling fans or ventilation slits. Adequate airflow across the power board is required to prevent thermal throttling or premature component aging under full load.

• Single-Point Grounding: Ensure that the chassis grounding screw is connected to a clean, low-impedance earth ground. Improper grounding can bypass the board's internal noise-rejection filters, resulting in erratic measurement values.

• Module Load Budgeting: Calculate the total power consumption of all installed I/O modules before powering on the system. Exceeding the combined current capacity of the power board rails can trigger automatic overcurrent protection and shut down the system.

• Hot-Swapping Restrictions: Unless explicitly stated in the specific chassis manual, do not insert or remove the power board or any adjacent modules while the main power supply is energized to prevent electrical arcing across backplane pins.

• Input Surge Suppression: When operating the power board in heavy industrial areas alongside large motors or welding equipment, install external surge protection devices on the incoming lines to protect against severe transient spikes.

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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