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3. Key Technical Specifications
- Product Type: Fiber Optic Splitter/Combiner Kit
- Associated System: FCP270 fault-tolerant Field Control Processor pairs
- Technology: Passive optical (non-powered)
- Function: Splits and combines high-speed optical communication signals between primary and secondary FCPs
- Wavelength Compatibility: Optimized for multi-mode fiber systems (typically 850 nm / 1300 nm range)
- Insertion Loss: Low-attenuation design
- Connector Type: Standard high-integrity fiber optic interfaces
- Operating Temperature: Approximately –20 °C to +70 °C
- Storage Temperature: Approximately –40 °C to +85 °C
- Construction: Industrial-grade housing for EMI/RFI immunity
- Typical Dimensions: Approximately 115 mm × 45 mm × 32 mm (kit-dependent)
- Weight: Approximately 0.22–0.46 kg (depending on exact kit configuration)
- Notes: Often supplied as a kit; alternative reference OSC-1801L appears in some documentation
4. Product Introduction
The Foxboro P0926MX is a passive fiber optic splitter/combiner kit used with the FCP270 Field Control Processor in fault-tolerant I/A Series and Foxboro Evo configurations. It manages the distribution and combination of optical communication signals between the primary and secondary control processors on the redundant Mesh network.
Control system engineers install the P0926MX when building or maintaining redundant FCP270 pairs. Because it is a passive optical device, it introduces minimal latency and eliminates active electronic failure points in the critical communication path between the two processors. Correct installation ensures reliable synchronization and data exchange required for seamless failover in high-availability process control applications.
P0926MX
P0926MX
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Loss of communication between primary and secondary FCP | Fiber discontinuity, dirty connectors, or incorrect splitter installation | ✅ High | Inspect fiber ends and connectors; verify continuity with optical tester | Clean connectors; reseat or replace fiber jumpers; confirm correct port assignment |
| High optical attenuation / intermittent link | Excessive insertion loss, bent fiber, or damaged splitter | ✅ High | Measure optical power levels on both sides of the splitter | Replace the P0926MX kit if loss exceeds specification |
| Redundancy not establishing | Incorrect fiber routing through the splitter/combiner | ✅ High | Trace fiber paths against system drawings | Correct fiber routing; verify primary/secondary connections |
| One side of redundant pair online only | Single fiber path failure or connector issue | ✅ Medium | Test each optical path independently | Isolate and repair the failed path |
| Physical damage to housing or connectors | Mechanical stress or improper handling | ✅ Medium | Visual inspection | Replace the kit; handle fiber components carefully |
| System reports optical link faults | External fiber plant or transceiver issue | ❌ Low (usually external) | Check FCP optical transceiver status and external fiber | Verify upstream/downstream fiber and SFP modules first |
If problems continue, record optical power measurements, FCP diagnostic status, and fiber routing details, then contact technical support with the data.
6. Frequently Asked Questions (FAQ)
Q: Is the P0926MX an active electronic module? A: No. It is a passive fiber optic splitter/combiner. It requires no power and contains no active electronics.
Q: What is it used for? A: It splits and combines optical signals between the primary and secondary FCP270 processors in a fault-tolerant pair so both units stay synchronized on the Mesh network.
Q: Does it require configuration or software? A: No. As a passive optical component, it needs only correct physical fiber connections according to the system drawings.
Q: Why is this unit priced lower than a current factory order? A: This is New Original / New Surplus stock. It is genuine Foxboro material that has not been installed in continuous service and carries functional verification. It is not refurbished.
Q: Can I substitute a generic fiber splitter? A: Not recommended. The P0926MX is specifically designed and qualified for the FCP270 redundant architecture. Using a non-qualified splitter can affect optical budget, latency, or reliability.
Q: What is the warranty and typical lead time? A: Standard coverage is 1 year. Units are normally in stock and ship within a few business days. Confirm current availability when ordering.
Q: Is this part still supported? A: The P0926MX remains in use with existing FCP270 fault-tolerant installations. Always verify against your specific system documentation before ordering.
