sbRIO Controller

NI sbRIO Controllers

What Is an sbRIO Controller?

An sbRIO controller is a Single-Board RIO embedded platform from NI. It combines processor-based application execution with FPGA-based deterministic logic, allowing engineers to build compact systems for acquisition, control, communication and custom I/O processing.

sbRIO hardware is commonly integrated into an enclosure designed by the equipment manufacturer or system integrator. The final product can include application-specific connectors, external signal conditioning, power distribution, cooling, safety circuits and communications interfaces around the sbRIO controller.

sbRIO, CompactRIO and CompactDAQ Compared

Core sbRIO Controller Capabilities

Real-Time Processor

The embedded processor runs application-level logic, communication services, data logging, user interfaces and supervisory control. Processor requirements depend on the number of tasks, communication protocols, file operations, analysis functions and expected system response time.

User-Programmable FPGA

The FPGA supports deterministic hardware-level processing for custom digital logic, high-speed timing, triggering, encoder handling, pulse generation, protocol processing and specialized control loops. FPGA logic can operate independently of operating-system scheduling delays.

Embedded I/O and Expansion

sbRIO controllers provide embedded I/O and expansion options that vary by model. The selected controller must provide the required analog, digital, communication and application-specific interface capability, either directly or through compatible expansion hardware.

Custom Product Integration

Because sbRIO is designed for board-level integration, engineers can create a custom enclosure, front panel, connector arrangement and interface board for the final product. This can reduce system size and support a cleaner OEM implementation than a general-purpose external chassis.

How to Select an sbRIO Controller

1. Define the Required I/O Architecture

List every required input, output and communication interface before selecting the controller. Include analog signals, digital status and control, encoder feedback, pulse outputs, serial devices, Ethernet connections, vehicle networks and custom external circuits.

For each signal, document voltage level, current requirement, direction, update rate, isolation need, connector type and expected cable length. Determine which functions are provided by onboard I/O and which require external interface or expansion hardware.

2. Determine FPGA Requirements

Use FPGA processing when the application requires deterministic timing, fast digital response, custom triggering, signal preprocessing, encoder decoding, pulse generation or hardware-level protocol handling.

Estimate the required FPGA resources for logic, memory, DMA transfers, timing loops, filtering and custom interfaces. Include expected future functions where the product design may be expanded after initial deployment.

3. Evaluate Processor and Real-Time Workload

Define processor tasks such as control sequencing, network communication, data logging, user-interface handling, diagnostics, data analysis and file management. A system with extensive networking or logging requirements may need more processor and memory resources than a simple deterministic controller.

Separate time-critical tasks from lower-priority operations. FPGA and real-time logic should handle deterministic work, while noncritical display, logging and network functions should not interfere with required control timing.

4. Confirm Communication Interfaces

Review the required Ethernet, serial, USB, CAN, fieldbus or custom communication interfaces. Confirm protocol support, connector accessibility, required isolation, cable routing and software-driver compatibility.

When a controller communicates with industrial equipment, motor drives, sensors or remote computers, evaluate the complete network design, including addressing, bandwidth, security, error handling and startup behavior.

5. Plan Power, Thermal and Mechanical Integration

sbRIO controllers require an appropriate regulated power source and a mechanical installation that supports the specified operating conditions. The final product must account for ambient temperature, airflow, heat transfer, vibration, shock, humidity, grounding and enclosure design.

Do not rely on bench-test conditions as proof of production suitability. Validate the integrated controller within the final enclosure, at representative load and temperature conditions.

6. Review Product Lifecycle and Service Requirements

For OEM and long-life equipment, document the controller part number, hardware revision, firmware, software version, FPGA build, external-interface design and calibration process. This information is important for repeat manufacturing, service, replacement and change control.

LabVIEW FPGA and Real-Time Software

sbRIO applications can use NI software tools for real-time control and FPGA development, depending on the selected controller and application architecture. FPGA programming is used for deterministic I/O behavior, while real-time software manages higher-level control, communications and system coordination.

A typical architecture separates the application into three layers:

• FPGA logic for time-critical I/O, triggering, pulse handling and custom hardware functions
• Real-time application logic for control sequences, deterministic decisions and system state management
• Host or network software for configuration, visualization, data review and noncritical user interaction

Confirm the supported LabVIEW, NI driver, operating-system and FPGA tool versions for the exact sbRIO controller before beginning development or replacing existing hardware.

Custom I/O and Signal Conditioning

External Interface Boards

Many sbRIO systems use a custom interface board to connect field wiring, sensors, drives, relays and external equipment. The interface board can provide connector conversion, isolation, filtering, level shifting, protection and sensor excitation where required.

Electrical Protection

Review overvoltage, reverse-polarity, transient, electrostatic-discharge and fault-energy risks for every external connection. Industrial and vehicle environments can expose board-level controllers to electrical conditions that require dedicated external protection.

Grounding and Signal Integrity

Define the grounding and shielding arrangement early in the design. Separate low-level measurement signals, digital logic, high-current outputs, motor wiring and switching supplies where practical to reduce noise and interference.

Typical sbRIO Controller Applications

• OEM embedded test and measurement equipment
• Industrial automation and machine control
• Robotics, motion and positioning systems
• Condition monitoring and predictive-maintenance products
• Custom data acquisition and logging appliances
• Energy, power-electronics and battery test systems
• Automotive and aerospace embedded validation systems
• Laboratory automation and scientific instruments
• Hardware-in-the-loop simulation platforms
• Specialized FPGA-based monitoring and control products

sbRIO Controller Procurement Guide

Часто задаваемые вопросы

What is the difference between sbRIO and CompactRIO?

sbRIO is a board-level embedded RIO platform intended for custom product integration. CompactRIO uses a chassis-based modular architecture with C Series I/O modules and is often selected for industrial or lab systems requiring modular expansion.

Does every sbRIO controller include an FPGA?

sbRIO controllers are designed around a processor and FPGA architecture, but available FPGA resources and supported functions vary by model. Confirm the exact controller specifications for the required application.

Can an sbRIO controller be used without a custom enclosure?

It can be used for development and integration work, but a production system should provide appropriate mounting, power distribution, cooling, electrical protection, connector access and environmental protection.

Can I connect industrial sensors directly to an sbRIO controller?

Only when the exact I/O specifications support the sensor’s electrical output and wiring arrangement. Many industrial sensors require external conditioning, isolation, protection or power circuitry.

Is sbRIO suitable for real-time control?

Yes, sbRIO is intended for embedded real-time and FPGA-based control applications. The achievable performance depends on the controller model, FPGA design, I/O architecture and complete software implementation.

Related NI Embedded Platforms

NI sbRIO Controllers from PXISOURCE

PXISOURCE supports engineers and OEM teams with sbRIO controller sourcing, replacement identification, embedded-system compatibility review and product-integration planning. Send the existing controller model, I/O requirements, FPGA needs, enclosure conditions and software environment for a technically matched quotation.