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3. Key Technical Specifications
- Manufacturer: FOXBORO (Schneider Electric)
- Part Number: P0916AEOC
- Product Type: Terminal Card / Compression Terminal Assembly
- Compatible Platform: Foxboro I/A Series DCS (FBM subsystem)
- Power Supply: 24 V DC ±10% common for all channels
- Isolation: Channels not galvanically isolated from each other; group isolation (optical and transformer) from ground and module logic; withstands 600 V AC for 1 minute
- Loop Load: Limited to one device per channel
- Mounting: DIN-rail compatible base (typical for series)
- Dimensions: Approximately 2.2 cm × 12.4 cm × 12.6 cm (confirm exact variant drawing)
- Weight: Approximately 0.1–0.25 kg
- Country of Origin: USA
- Typical Application: Field wiring interface for RTD / analog input FBMs (e.g., FBM203 family)
4. Product Introduction
The FOXBORO P0916AEOC is a terminal card (compression terminal assembly) for the I/A Series DCS. It provides the physical field-wiring interface between process instruments and the associated Fieldbus Module (FBM), routing signals while maintaining group isolation from ground and module logic.
Engineers select this part when replacing a damaged or corroded termination assembly on existing I/A Series racks. The 24 V DC common supply and single-device-per-channel load limit keep wiring simple and consistent with original FBM designs. Verify exact FBM pairing and pinout against the OEM datasheet before installation.
- P0916AEOC
- P0916AEOC
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No field signals reaching FBM | Open or high-resistance terminal connection | ✅ High | Measure continuity from field wire to FBM connector pins with multimeter | Clean or re-torque terminals; replace TA if corrosion present |
| Intermittent or noisy readings | Poor contact or loose compression screws | ✅ High | Wiggle test each terminal under load; check torque | Re-seat wires; replace assembly if threads damaged |
| Group isolation failure / ground fault | Damaged isolation barrier on card | ✅ Medium-High | Megger test (500 V) between field side and logic/ground | Replace terminal card; do not attempt field repair |
| Power LED or FBM status OK but no loop power | Missing or out-of-tolerance 24 V DC common | ❌ Low (external) | Measure 24 V DC ±10% at terminal power pins | Check upstream supply and fusing first |
| Single channel dead, others good | Field device or wire fault | ❌ Low | Swap field wire to known-good channel | Confirm field device before replacing TA |
| Multiple channels show same offset | Shared group isolation or supply issue | ✅ Medium | Compare readings with spare known-good TA | Swap TA to isolate; verify cable continuity |
If symptoms persist after basic checks, photograph the installed card, note the FBM model and firmware, and contact technical support with diagnostic logs.
6. Frequently Asked Questions (FAQ)
Q: Is the P0916AEOC the same as P0916AE? A: They are closely related compression terminal assemblies in the same family. P0916AE is commonly listed for FBM203 RTD inputs. The “OC” suffix on P0916AEOC indicates a specific variant (coating, connector style, or revision). Confirm the exact part number stamped on your existing unit and match it. Do not assume drop-in compatibility without checking the wiring diagram.
Q: Can I hot-swap this terminal card? A: No. Power down the associated FBM and field circuits first. Hot removal risks arcing, ESD damage, or loss of isolation. Always follow lock-out/tag-out and wear a grounded wrist strap.
Q: What condition is this unit and why is it priced lower than factory list? A: Units offered as New Original / New Surplus are unused stock, typically from excess inventory or project cancellations. They have not been installed in a running plant. They are not factory-refurbished unless explicitly stated. Full functional and isolation testing is performed before shipment.
Q: Does it support per-channel galvanic isolation? A: No. Channels share group isolation from ground and module logic (optical + transformer). They are not isolated from each other. If your application requires individual channel isolation, verify the FBM and termination combination carefully against the OEM manual.
Q: What is the warranty and lead time? A: Standard offer is 1-year warranty against defects in materials and workmanship. Most units ship from stock within 1–3 business days. Confirm current availability at time of order.
Q: How do I verify compatibility with my FBM? A: Match the terminal assembly part number to the FBM model listed in the I/A Series hardware documentation (typically FBM203 family for RTD-style TAs). Photograph the existing card’s labels and the cable connectors before removal. Request confirmation of the exact revision if your system is older.
Q: Any common installation pitfalls? A: The most frequent issues are mismatched wire gauges that prevent proper compression, missing or incorrect terminating resistors on the field side, and failure to document the original terminal screw positions. Take clear photos before disconnecting anything. Always torque to the value specified in the FOXBORO termination assembly manual.
