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Help CenterABB 086318-002 / 086318-501 – Legacy I/O Termination Assembly for ABB Bailey INFI 90 / NET 90 Cabinets
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The ABB 086318-002 and 086318-501 are legacy termination/interface assemblies commonly used to bridge controller I/O to field wiring in ABB Bailey INFI 90 and NET 90 systems. From my experience, these part numbers are selected as form-fit-function replacements to keep mature DCS cabinets running with minimal rewiring. They’re practical for like-for-like maintenance, phased migrations, or adding spare capacity where the original termination format must be preserved.
Form-fit compatibility – Typically matches the legacy Bailey termination footprint and field wiring layout, cutting downtime during swap-outs.
Passive design – No dedicated power required; reduces failure points and eases troubleshooting in most cases.
Clean field marshalling – Screw or plug terminals (per revision) help organize digital and analog channels neatly.
Controller harness interface – Designed to connect via factory harness/cable to the corresponding I/O module as per ABB Bailey conventions.
Service-friendly labeling – Clear channel markings and typical test-access points make loop checks faster for maintenance teams.
Drop-in replacement strategy – Ideal for systems where you want to avoid wholesale rewiring or cabinet rework.
| Brand / Model | ABB — 086318-002 / 086318-501 |
| Product Type | Legacy I/O termination / interface assembly for ABB Bailey INFI 90 / NET 90 |
| Power Requirements | None (passive board; receives I/O signals from controller harness) |
| Operating Temperature | Typically 0 to 55°C (32 to 131°F) when installed in a conditioned cabinet |
| Signal I/O Types | Depends on paired module; supports digital or analog field loops per system design |
| Controller Interface | Factory harness/cable interface (per ABB Bailey part pairing) |
| Installation Method | Panel or rail mounting inside DCS cabinet; verify hole pattern by revision |
| Dimensions & Weight | Varies by revision; compact termination form factor (refer to datasheet for exact values) |
You might notice that these assemblies remain common in facilities where ABB Bailey systems are still the backbone of control. Typical use cases include:
Power generation (coal, gas, combined cycle) — sustaining existing I/O cabinets during outages
Oil & gas and refining — maintaining legacy marshalling while planning phased upgrades
Chemicals and petrochemicals — minimizing downtime where regulatory loops can’t be disturbed
Pulp & paper, metals, mining — like-for-like replacements to avoid field rewiring
Utilities and water — standardizing spare parts across multiple older substations or plants
Reduced retrofit effort – Reuse existing wiring pathways and tags; typically no field-side re-termination.
Lower risk – Passive hardware means fewer compatibility surprises and straightforward loop checks.
Lifecycle continuity – Extends the viable life of ABB Bailey control rooms while upgrade plans are finalized.
Support-friendly – Technicians familiar with INFI 90 practices can service these without new tools or training.
Cost control – Avoids large capital work by enabling targeted replacements during scheduled stops.
Customer note: “We swapped an aging termination board with 086318-501 during a 12‑hour window. Field wires stayed put, and our I/O checks were done before the night shift. It seems to be the simplest fix we’ve done on this cabinet.” — Maintenance Supervisor, combined-cycle plant
Environment – Install in a clean, dry control cabinet with adequate ventilation; keep within the DCS system’s specified temperature/humidity.
Mounting – Verify hole pattern and standoff height by revision (-002 vs. -501 can differ). Keep harness bend radius gentle.
Wiring – Isolate power, tag and verify each loop, and torque terminals to manufacturer-recommended values. Maintain shield terminations per site standards.
Safety – Observe ESD procedures and lockout/tagout. Confirm correct part pairing before energizing I/O.
Routine checks – Periodically re-torque terminals, inspect for oxidation, clean dust with dry air, and verify channel labeling after any cabinet work.
Documentation – Match the board to your I/O module part numbers and cabinet wiring diagrams; keep a spare on the shelf for critical loops.
Manufacturing pedigree – Built to ABB’s industrial quality standards for legacy DCS hardware.
Compliance – Typically used within CE/UL certified system assemblies; exact approvals may vary by revision—consult the official datasheet for confirmation.
RoHS/Material status – Legacy spare; material declarations can depend on manufacturing date.
Warranty – Standard 12‑month limited warranty from shipment on normal industrial use (terms may vary by supply source).
Controller harness/cable assemblies matched to your I/O module series (avoid mixed revisions where possible).
Terminal covers and markers for channel labeling and touch safety inside the cabinet.
Spare standoffs and mounting hardware for quick swap during outages.
Documentation pack: wiring map printouts and loop sheets aligned to the 086318-002 / 086318-501 terminal layout.
If you can share your cabinet photos or the paired I/O module part numbers, we can double-check whether 086318-002 or 086318-501 is the better match. In many cases, the physical revision and harness pinout decide it.
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