National Instruments sbRIO-9627 | 16 AI / 4 AO Embedded Controller

Description

Product Introduction

The National Instruments sbRIO-9627 is an embedded CompactRIO Single-Board Controller that combines a real-time processor, user-programmable FPGA, and onboard analog/digital I/O on one PCB. It is designed for embedded OEM control, test, measurement, and machine-control applications where the application requires deterministic FPGA processing together with a real-time operating environment. NI identifies the controller as using a 667 MHz dual-core ARM Cortex-A9 processor, a Zynq-7020 FPGA, 512 MB DRAM, and 512 MB nonvolatile storage.

The NI sbRIO-9627 also provides an RMC connector for expansion and direct access to FPGA-connected signals. Its onboard I/O includes 16 channels of 16-bit analog input, configurable as 16 single-ended or 8 differential channels, four 16-bit analog outputs, and 100 digital lines. Communications include Ethernet, CAN, USB, serial interfaces, and SD/SDHC storage. This combination makes the board considerably more than an I/O interface: it is the embedded computing and control core of an sbRIO-based system.

NI currently classifies the sbRIO-9627 as a mature product and lists recommended replacements, so it should be treated as a legacy platform when planning long-term system support. Existing applications should be evaluated for software, FPGA bitfile, operating-system, RMC, and mechanical compatibility before migration.

Key Technical Specifications

The detailed specifications are based on NI’s published sbRIO-9627 documentation.

Application Scenarios & Engineering Considerations

The NI sbRIO-9627 is particularly useful where conventional PLC scan-based control is not sufficient and the application needs FPGA-level processing.

• OEM machine control: The single-board format allows the controller to be integrated directly into a machine’s electronics rather than requiring a conventional modular chassis.
• High-speed control: FPGA resources can be used for deterministic timing, custom digital protocols, signal processing, and control loops.
• Test and measurement: The combination of 16-bit analog inputs, analog outputs, FPGA processing, and real-time software makes the board suitable for automated test equipment.
• Motion and custom I/O: The RMC connector provides additional FPGA-connected digital resources for custom interface hardware.
• Industrial communications: Ethernet, CAN, RS-232, and RS-485 interfaces allow the controller to communicate with external devices without relying entirely on RMC expansion.

Field note: The 3.3 V FPGA DIO should not be treated as a conventional 24 V PLC input/output. External level conversion, isolation, or interface circuitry may be required when connecting plant-level devices.

SBRIO-9627

Related Products

• NI sbRIO-9627 783817-01 — Development-kit version of the controller. NI states that this version includes additional development accessories, including the NI-9694 Digital I/O Breakout RMC.
• NI sbRIO-9627 783817-02 — OEM-oriented version of the same controller. It has the same fundamental sbRIO-9627 processor, FPGA, I/O, and RMC architecture.
• NI-9694 — Digital I/O Breakout RMC that provides practical access to sbRIO digital signals. It is included with the 783817-01 development-kit configuration.
• NI sbRIO-9607 — Related sbRIO controller from the same general embedded platform, but it has a different hardware configuration and should not be assumed to be a direct substitute.
• NI CompactRIO platform — Broader NI control platform using real-time processors and FPGA technology. For applications requiring published shock/vibration specifications, NI recommends CompactRIO systems rather than relying on sbRIO’s mechanical performance.

The Engineer’s Guide: Field Pitfalls to Avoid

⚠️ Do not confuse the sbRIO-9627 with a conventional PLC CPU.

The board combines a real-time processor and FPGA, and a substantial portion of the application’s behavior can reside in the FPGA bitfile and LabVIEW Real-Time software.

How to avoid it: When replacing a failed controller, preserve the NI Linux Real-Time configuration, application files, FPGA bitfile, LabVIEW version, and I/O configuration, not just the physical board.

⚠️ Do not connect 24 V field signals directly to FPGA DIO.

The RMC digital I/O operates around 3.3 V logic, with NI specifying ±3 mA maximum tested current per channel.

How to avoid it: Use suitable signal conditioning or isolated interface hardware for industrial field wiring.

⚠️ Check the RMC configuration.

The RMC connector provides high-density FPGA-connected I/O and can also carry communication interfaces and power. A replacement controller must match the RMC hardware used by the application.

⚠️ Do not overlook thermal design.

NI specifies a −40 to +85 °C local ambient operating range, but the final enclosure, mounting, airflow, and RMC hardware affect actual thermal performance. NI also notes that sbRIO shock/vibration performance is application-dependent rather than a published fixed specification.

Frequently Asked Questions

What is NI sbRIO-9627?

The NI sbRIO-9627 is an embedded CompactRIO Single-Board Controller combining a 667 MHz dual-core ARM processor, Zynq-7020 FPGA, onboard analog/digital I/O, communications, and an RMC expansion connector.

How many analog inputs does it have?

It provides 16 single-ended or 8 differential 16-bit analog inputs, with an aggregate sampling rate of up to 200 kS/s.

How many analog outputs are available?

There are four 16-bit analog outputs, with a ±10 V output range.

What FPGA is used?

The controller uses the Xilinx Zynq-7000 XC7Z020, providing approximately 85,000 logic cells, 220 DSP slices, and 560 KB block RAM according to the published specifications.

What supply voltage does sbRIO-9627 require?

The published supply range is 9–30 VDC, with NI recommending a 55 W, 30 VDC maximum supply. Maximum power consumption with an RMC is listed as 29 W.

Is sbRIO-9627 still recommended for new designs?

NI currently marks the sbRIO-9627 as mature and lists recommended replacement products, so it is better regarded as a legacy platform for existing installations rather than a first choice for a new design.

What should I verify before purchasing a replacement?

For a production replacement, verify:

1. sbRIO-9627
2. 783817-01 or 783817-02
3. PCB/hardware revision
4. Installed NI Linux Real-Time version
5. LabVIEW and FPGA compatibility
6. FPGA bitfile
7. RMC hardware
8. Analog I/O configuration
9. Network configuration
10. CAN/serial interfaces
11. SD/boot configuration
12. Power supply and thermal conditions