Product Introduction
The NI-9149 is a high-performance EtherCAT expansion chassis designed to extend distributed measurement and industrial control systems using National Instruments C Series I/O modules. Featuring deterministic EtherCAT communication, synchronized timing, and modular expansion capabilities, the NI-9149 enables engineers to deploy remote data acquisition and control systems for industrial automation, machine control, robotics, and condition monitoring.
Supporting multiple NI C Series modules, the NI-9149 allows analog, digital, motion, temperature, vibration, and communication signals to be distributed close to sensors and actuators while maintaining deterministic communication with an EtherCAT master controller.
Product Overview
The NI-9149 is part of the National Instruments EtherCAT expansion chassis family. Rather than operating as a standalone CompactDAQ controller, it functions as a remote EtherCAT slave chassis controlled by NI CompactRIO, PXI Real-Time controllers, Industrial Controllers, or other EtherCAT master systems.
Its deterministic Ethernet communication and integrated synchronization make it ideal for applications requiring precise timing, distributed I/O expansion, and reliable industrial operation.
The chassis integrates seamlessly with LabVIEW Real-Time, LabVIEW FPGA, NI Scan Engine, NI MAX, and NI-DAQmx-supported C Series modules.
Key Features
EtherCAT Distributed I/O Architecture
The NI-9149 extends real-time measurement and control systems through deterministic EtherCAT communication.
- EtherCAT slave device
- Deterministic communication
- Distributed I/O architecture
- Low communication latency
- Industrial networking
Advantage: Enables remote measurement and control while maintaining precise synchronization.
Support for NI C Series Modules
The chassis accepts interchangeable NI C Series I/O modules for flexible measurement configurations.
- Analog input modules
- Analog output modules
- Digital I/O modules
- Temperature modules
- Strain modules
- CAN modules
- Counter modules
- Relay modules
Advantage: Supports a wide variety of industrial measurements without changing the chassis.
Deterministic Timing and Synchronization
Built-in synchronization resources ensure accurate operation across distributed systems.
- Hardware synchronization
- Distributed clocks
- Deterministic execution
- Real-time communication
- Precise timing
Advantage: Ideal for synchronized machine control and high-speed industrial automation.
Industrial Ethernet Connectivity
Designed for reliable operation in industrial EtherCAT networks.
- Dual Ethernet ports
- EtherCAT daisy-chain support
- Long cable distance
- Industrial networking
- Easy deployment
Advantage: Simplifies installation while reducing wiring costs.
Designed for Industrial Automation
Built for demanding manufacturing and machine control environments.
- Industrial-grade design
- Continuous operation
- Machine automation
- Reliable performance
- Distributed measurement
Advantage: Suitable for long-term industrial deployment with high system reliability.
Technical Specifications
| Parameter | Description |
|---|---|
| Product Type | EtherCAT Expansion Chassis |
| Communication Protocol | EtherCAT |
| Device Type | EtherCAT Slave Chassis |
| Compatible Modules | NI C Series Modules |
| Ethernet Ports | Dual RJ45 EtherCAT Ports |
| Synchronization | Distributed Clocks / Hardware Timing |
| Expansion | Distributed Modular I/O |
| Compatible Controllers | CompactRIO, PXI RT Controllers, Industrial Controllers |
| Software Support | LabVIEW Real-Time, LabVIEW FPGA, NI Scan Engine |
| Operating Temperature | Industrial Operating Range |
Software Ecosystem
The NI-9149 integrates seamlessly with National Instruments software for deterministic measurement and industrial automation.
- LabVIEW Real-Time – Develop deterministic control applications.
- LabVIEW FPGA – Configure FPGA-based C Series modules where applicable.
- NI Scan Engine – Configure distributed EtherCAT I/O without FPGA programming.
- NI MAX – Hardware discovery and configuration.
- CompactRIO Software – Integrated distributed control and monitoring.
- C/C++ and .NET APIs – Supported through NI software ecosystem.
Industries
- Industrial Automation
- Machine Control
- Robotics
- Semiconductor Manufacturing
- Automotive Production
- Energy Systems
- Research Laboratories
- Smart Manufacturing
Applications
Distributed Industrial I/O
Extend measurement and control systems across factory equipment.
- Remote sensors
- Distributed actuators
- Factory automation
- Machine expansion
Machine Control Systems
Acquire synchronized signals while controlling industrial machinery.
- Servo control
- Machine diagnostics
- Motion systems
- Industrial equipment
Condition Monitoring
Deploy remote vibration, temperature, and electrical monitoring systems.
- Predictive maintenance
- Equipment monitoring
- Motor diagnostics
- Process monitoring
Industrial Test Systems
Expand modular automated measurement platforms through EtherCAT.
- Production testing
- Validation systems
- Distributed acquisition
- Quality assurance
Comparison with Similar Products
| Model | Main Difference | Best Application |
|---|---|---|
| NI-9149 | EtherCAT expansion chassis for distributed C Series I/O. | Industrial EtherCAT systems |
| NI-9144 | Earlier-generation EtherCAT expansion chassis. | General distributed I/O |
| NI cDAQ-9185 | Ethernet CompactDAQ chassis for host-based measurements. | Ethernet data acquisition |
| NI cRIO-9049 | CompactRIO embedded controller with integrated real-time processing and FPGA. | Standalone real-time control |
Recommended Related Products
| NI-9205 | 32-channel analog input C Series module. |
| NI-9219 | Universal analog input module for multiple sensor types. |
| NI-9234 | Dynamic signal acquisition module for vibration monitoring. |
| NI-9401 | High-speed bidirectional digital I/O module. |
| NI cRIO-9049 | CompactRIO controller for EtherCAT master applications. |
Why Choose NI-9149?
- Industrial EtherCAT distributed I/O platform
- Supports interchangeable NI C Series modules
- Deterministic real-time communication
- Distributed clock synchronization
- Compatible with CompactRIO and PXI Real-Time controllers
- Seamless integration with LabVIEW Real-Time and NI Scan Engine
- Scalable industrial automation architecture
- Ideal for machine control and distributed measurement systems
Frequently Asked Questions
What is the NI-9149 primarily used for?
The NI-9149 is used as an EtherCAT expansion chassis to provide distributed C Series I/O for industrial automation, machine control, condition monitoring, and deterministic measurement applications.
Can the NI-9149 operate as a standalone CompactDAQ controller?
No. The NI-9149 is an EtherCAT slave chassis and must be connected to an EtherCAT master such as a CompactRIO controller, PXI Real-Time controller, or compatible industrial controller.
Which software supports the NI-9149?
The NI-9149 is supported by LabVIEW Real-Time, LabVIEW FPGA, NI Scan Engine, NI MAX, and the National Instruments software ecosystem used for EtherCAT and C Series module development.
Conclusion
The NI-9149 EtherCAT Expansion Chassis delivers deterministic distributed I/O, modular C Series flexibility, and industrial EtherCAT communication in one compact platform. With seamless integration into CompactRIO and real-time control systems, it provides an excellent solution for industrial automation, machine control, smart manufacturing, and high-performance distributed measurement applications.
