Allen-Bradley 1746-NI16I Analog Input Module – Obsolete SLC 500 Spare Part

Technical Dossier

Product Details And Specifications

Allen-Bradley 1746-NI16I Analog Input Module – Obsolete SLC 500 Spare Part

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Solving the Discontinued Hardware Crisis

The Allen-Bradley SLC 500 platform was the backbone of North American discrete and process manufacturing for over two decades. Thousands of facilities — food and beverage, automotive, water treatment, oil and gas — built their control architecture around SLC 500 hardware. Rockwell Automation officially discontinued the SLC 500 product line, but the installed base did not disappear. It is still running.

Condition & Reliability Assurance

Every 1746-NI16I unit processed by DriveKNMS passes a structured 5-step inspection protocol before it is offered for sale:

• Step 1 – Visual and Mechanical Inspection: Board-level examination for physical damage, burn marks, cracked traces, and connector pin integrity. Corroded or bent backplane pins are cause for immediate rejection.
• Step 2 – Electrolytic Capacitor Assessment: Aging electrolytic capacitors are the primary failure mode in legacy analog modules. Each unit is inspected for capacitor bulging, leakage, and ESR deviation. Units with suspect capacitors are either recapped with equivalent-spec components or rejected.
• Step 3 – Firmware and Label Verification: The firmware revision and catalog number label are cross-referenced against Rockwell's published revision history to confirm the unit is not a counterfeit or mislabeled variant.
• Step 4 – Pin and Connector Corrosion Check: Backplane connector pins are inspected under magnification and cleaned where necessary. Oxidation that affects contact resistance is treated or the unit is rejected.
• Step 5 – Functional Bench Test: Where test equipment permits, modules are powered and channel response is verified against published specifications.

Units are classified as New Surplus (unused, original packaging), Refurbished (tested, cleaned, reconditioned), or As-Is (sold for parts or advanced users). Condition is disclosed on every order confirmation.

Key Features for System Maintenance

How do I confirm the unit is genuine and not counterfeit?
Each unit is inspected for catalog number label authenticity, board markings, and component layout consistency with known-good reference units. We do not source from unverified brokers. Provenance documentation is available on request for critical applications.

Can this module be used in a 1747 or 1771 chassis?
No. The 1746-NI16I is designed exclusively for the SLC 500 (1746-series) backplane. It is not compatible with the PLC-5 (1771-series) or any ControlLogix/CompactLogix platform.