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Phone: +86 16626708626Description
Key Technical Specifications
- Manufacturer: ABB
- Type designation: COM0011
- Product ID: 2RAA005844A0007
- Function: Ethernet, RS485, and IRIG-B communication
- Ethernet connector: RJ-45
- Serial interface: RS485
- Time synchronization: IRIG-B
- Product type: Spare part / communication module
- Net weight: 0.096 kg
- Environmental rating: IP20
- Storage temperature: -40 °C to +85 °C
- Humidity: 5% to 95%, non-condensing
Product Introduction
ABB COM0011 2RAA005844A0007 is a communication interface module used in ABB protection and control systems. It provides RJ-45 Ethernet, RS485, and IRIG-B connectivity for field communication and time synchronization in industrial automation panels.
This module is chosen when you need a direct OEM spare with the correct rear-communication interface layout. Verify the exact panel and system compatibility before installation, especially if the existing unit uses a different COM module variant or jumper configuration.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No Ethernet link on RJ-45 | Cable, switch, or port issue | ❌ Low | Check link LEDs and test cable continuity | Replace cable or verify switch port before blaming the module |
| RS485 comms timeout | Baud rate, polarity, or wiring mismatch | ⚠️ Medium | Measure wiring, confirm A/B polarity, check settings | Match the site settings and terminal wiring exactly |
| IRIG-B time not syncing | Input source, signal level, or wiring fault | ⚠️ Medium | Verify IRIG-B source with a scope or time sync tester | Check source level and connector integrity first |
| Module not recognized by system | Wrong COM variant or installation issue | ✅ High | Confirm part number, seating, and backplane alignment | Recheck model compatibility and reseat the module |
| Intermittent comms loss | Loose connector, shielding, or grounding issue | ⚠️ Medium | Inspect connector torque, shield termination, and ground path | Tighten, re-terminate, and verify grounding scheme |
| No LEDs active after power-up | Upstream supply or rack issue | ❌ Low | Measure supply voltage and rack backplane power | Check rack power and adjacent modules before replacement |
Contact technical support with photos, wiring details, and diagnostic logs if the fault does not isolate cleanly.
- COM0011
- COM0011
Frequently Asked Questions
Q: Is ABB COM0011 2RAA005844A0007 still available?
A: Yes, this part is commonly sold as surplus or OEM stock, but availability can vary by lot. For ABB legacy hardware, I would treat it as a procurement item with limited replacement depth.
Q: Is this a direct replacement for every COM0011?
A: Not automatically. The base model matters, but the exact product ID and site configuration matter too. Always confirm the existing module label, connector layout, and system manual before ordering.
Q: Can I swap it without power cycling the system?
A: Do not assume hot-swap support. On this class of ABB communication hardware, power-down is usually the safer move unless the OEM manual explicitly allows live replacement. Pulling it live can create comms faults or backplane issues.
Q: Will my configuration stay in the controller after replacement?
A: Usually the controller keeps the configuration, but the new module still has to match the old hardware and communication settings. Take photos of DIP switches, jumpers, and cable positions before removal.
Q: Why is this cheaper than buying new from ABB?
A: Because it is often new surplus or tested stock from secondary channels, not factory-direct fresh production. That lowers the price, but you should expect clear condition disclosure and documented testing.
Q: What condition should I expect?
A: For this listing format, the safest description is New Original / New Surplus. If it is refurbished, the seller should say so plainly and provide test results.
Q: What usually causes failures that look like a bad COM0011?
A: In the field, wiring, settings, grounding, and the wrong part number cause more trouble than the module itself. I always verify the site wiring, RS485 polarity, and IRIG-B source before declaring the board bad.
