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3. Key Technical Specifications
- Model: cRIO-9073 (Part Number typically 780471-01)
- Processor: 266 MHz industrial real-time processor
- Memory: 64 MB DRAM, 128 MB nonvolatile storage
- FPGA: Xilinx Spartan-3 2M (40,960 flip-flops, 40,960 LUTs, 40 multipliers, 720 kbit block RAM, 3 DMA channels)
- I/O Slots: 8 slots for C Series modules
- Ethernet: 1 × 10/100BASE-TX
- Serial: 1 × RS-232
- Power Input: 19–30 VDC
- Operating Temperature: –20 °C to +55 °C
- Form Factor: Integrated controller + chassis (fanless)
- Programming: LabVIEW Real-Time and LabVIEW FPGA
Note: Exact firmware and hardware revision should be verified against your existing system and LabVIEW version compatibility.
4. Product Introduction
The National Instruments cRIO-9073 is an integrated CompactRIO system that combines a 266 MHz real-time processor with a user-programmable Xilinx Spartan-3 2M FPGA in an 8-slot chassis. It is designed for deterministic control, high-speed data acquisition, and embedded monitoring applications.
Engineers use the cRIO-9073 in machine control, process monitoring, and industrial test systems that require both real-time processing and custom FPGA logic. The unit is fanless and ruggedized for industrial environments. As a legacy product, current availability is limited to New Surplus or fully tested residual stock.
CRI0-9073
CRI0-9073
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No POWER LED | Power supply or wiring issue | ✅ High | Measure 19–30 VDC at power connector | Verify external power supply and polarity |
| STATUS LED blinking / error | Software or hardware fault | ✅ High | Check MAX (Measurement & Automation Explorer) status and error codes | Review system logs and reinstall software if needed |
| Cannot connect via Ethernet | IP configuration or cable fault | ✅ High | Verify IP settings; test with known-good cable | Reset network settings via DIP switches if necessary |
| FPGA or Real-Time target not detected | Driver or LabVIEW version mismatch | ✅ High | Confirm compatible LabVIEW Real-Time and FPGA Module versions | Match software version to hardware revision |
| Modules not recognized | Chassis or module seating issue | ❌ Medium | Reseat C Series modules; check power budget | Verify module compatibility and power consumption |
If the issue persists, capture STATUS LED behavior, MAX screenshots, and software version details before contacting support.
6. Frequently Asked Questions (FAQ)
Q: Is the cRIO-9073 still supported by National Instruments?
A: It is a legacy product and no longer available as new from NI. Driver and software support is limited to older LabVIEW versions. Current stock is New Surplus or tested residual units.
Q: What is the difference between cRIO-9073 and cRIO-9074?
A: The cRIO-9073 uses a 266 MHz processor with 64 MB DRAM / 128 MB storage. The cRIO-9074 uses a faster 400 MHz processor with 128 MB DRAM / 256 MB storage and dual Ethernet ports.
Q: Can I use modern LabVIEW versions with the cRIO-9073?
A: Compatibility is limited. Older LabVIEW Real-Time and FPGA Module versions (typically 8.6 through early 201x releases) are required. Always check the official NI hardware/software compatibility matrix for your specific revision.
Q: Does it support Scan Mode or only FPGA programming?
A: It supports both Scan Interface mode (for simpler I/O access) and full FPGA programming via the LabVIEW FPGA Module, depending on the software version used.
Q: What power supply is recommended?
A: A regulated 24 VDC supply capable of at least 48 W is typically recommended, within the 19–30 VDC input range. Ensure adequate current for the controller plus all installed C Series modules.
Q: Why is this priced lower than current CompactRIO controllers?
A: It is a discontinued legacy product sold as New Surplus or residual stock. Pricing reflects remaining inventory rather than current production cost. All units are functionally verified before shipment. Standard warranty is typically 12 months.
Q: Is conformal coating available?
A: Standard units are not conformal coated. Industrial or hazardous-location variants may exist under different part numbers—confirm the exact part number if coating is required.
