Allen-Bradley 1746-A10 SLC 500 10-Slot Chassis – Obsolete SLC 500 Spare Part

Technical Dossier

Product Details And Specifications

Allen-Bradley 1746-A10 SLC 500 10-Slot Chassis – 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.

Technical Specifications

Solving the Discontinued Hardware Crisis

The SLC 500 platform was Rockwell Automation's workhorse for small-to-mid-range discrete manufacturing from the late 1980s through the 2000s. Thousands of installations remain in active production across food and beverage, automotive stamping, material handling, and water treatment. Rockwell has formally discontinued the SLC 500 line and directed users toward the Logix family—a migration that carries full system redesign costs.

The 1746-A10 chassis is the physical backbone of any 10-slot SLC 500 rack. It houses the processor, power supply, and all I/O modules. Backplane failures, slot connector corrosion, or mechanical damage to the chassis render the entire rack inoperable. Because the backplane bus is proprietary, there is no cross-brand substitute. The only operationally viable options are: source a replacement 1746-A10, or commit to a full platform migration.

How to extend your SLC 500 asset life by 5–10 years:

Condition & Reliability Assurance

Sourcing discontinued hardware carries inherent risk. DriveKNMS applies a 5-step inspection protocol to every 1746-A10 chassis before dispatch review:

1. Visual and mechanical inspection: All 10 slot connectors examined for bent pins, corrosion, and foreign material. Chassis rail and mounting hardware checked for deformation.
2. Backplane continuity test: Each slot's backplane bus lines verified for continuity and isolation. Open or shorted backplane traces are cause for rejection.
3. Electrolytic capacitor assessment: Power distribution components on the backplane board inspected for signs of electrolyte leakage or bulging—a common failure mode in units stored beyond 10 years.
4. Slot contact cleaning and treatment: All I/O slot contacts cleaned with appropriate contact cleaner and treated to inhibit re-oxidation.
5. Functional rack test: Where test equipment permits, chassis is populated with a known-good processor and power supply and powered to confirm backplane communication across all slots.

Key Features for System Maintenance

How do I confirm the unit is genuine Allen-Bradley and not a counterfeit?
All units sourced by DriveKNMS are inspected for OEM markings, catalog label authenticity, and construction consistency with known-genuine samples. We do not source from unverified brokers. Documentation of unit origin is available on request.

Should I buy more than one chassis as a long-term spare?
For any SLC 500 line with more than 3 years of planned operation, holding two spare chassis is the standard recommendation. The 1746-A10 is no longer manufactured. Secondary market availability will continue to tighten. Purchasing now at current pricing is a lower-cost decision than sourcing under emergency conditions in 18–24 months.

Can this chassis be used with a SLC 5/05 Ethernet processor?
Yes. The 1746-A10 chassis is compatible with all SLC 500 processor variants including the 1747-L551 (SLC 5/05). The chassis itself does not determine communication capability—that is determined by the processor module installed in slot 0.