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Key Technical Specifications
- Model: 01-W3781B03C
- Manufacturer: Motorola
- Product Type: VME single-board computer
- Platform: VMEbus embedded control
- Application: Industrial automation and legacy control systems
- Form Factor: VME module
- Compatibility: Verify backplane, firmware, and board revision before installation
- Condition: New Surplus
- Availability: Limited stock, subject to prior sale
- Replacement Status: Obsolete/legacy part
Product Introduction
Motorola 01-W3781B03C is a legacy VMEbus single-board computer used in industrial control and data-processing systems. It is typically purchased as an exact-match replacement for older racks where maintaining the existing hardware stack matters.
The important checks are board revision, rack compatibility, and software support for the installed system. Verify the full part number, connector layout, and any firmware or boot settings before you order.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No boot or no LEDs on power-up | Backplane power issue, bad seating, or failed board | ✅ High | Measure rack rails at the backplane and reseat the module | Check power and slot health before replacing the card |
| Board not detected by host | Addressing issue, jumper mismatch, or bus fault | ✅ High | Verify jumper/switch settings and host diagnostics | Match the original configuration exactly |
| Boot hangs or stops early | Firmware issue, battery fault, or memory problem | ✅ High | Read console output and check battery condition | Review firmware and battery state before replacement |
| Random resets | Power instability or overheating | ✅ High | Measure supply rails under load and check airflow | Verify rack power and cooling |
| Communication loss with peripherals | Driver mismatch or serial/network configuration issue | ✅ Medium | Compare software settings with the removed board | Confirm system software compatibility |
| Works in one slot but not another | Backplane slot or address map problem | ✅ High | Move to a known-good slot and retest | Inspect the backplane before blaming the card |
| Intermittent faults after handling | ESD or poor edge contact | ✅ Medium | Inspect the connector edge and retest in a controlled setup | Use ESD control and clean contacts |
If you’re stuck, send photos of the board, jumpers, slot, and any console or diagnostic logs.
- 01-W3781B03C
Frequently Asked Questions
Q: Is this a direct replacement for my current board?
A: It can be, but only if the exact board revision, suffix code, and backplane setup match. With legacy Motorola VME hardware, part number similarity is not enough.
Q: Can I hot-swap this module?
A: No. Power the rack down first unless your system documentation explicitly allows live insertion. On a board this age, hot-swapping is a bad idea.
Q: What does the 01-W3781B03C suffix mean?
A: It points to a specific board build or option configuration. That suffix matters for compatibility, so verify it against the removed unit before ordering.
Q: Will my existing configuration carry over?
A: Not automatically. Capture the current jumper settings, boot parameters, and any stored configuration before pulling the old board.
Q: Why is it priced below factory-new hardware?
A: Because it is usually sold as new surplus or legacy stock, not current production. The lower price reflects availability and lifecycle status, not a different part identity.
Q: What condition is this unit in?
A: New Surplus. That usually means unused inventory, but storage history and packaging condition should still be confirmed.
Q: What should I verify before I buy it?
A: Confirm the full part number, board revision, rack family, power requirements, and any software dependencies. That avoids most replacement surprises.
