Allen-Bradley 1746-A13/B SLC 500 13-Slot Chassis – Obsolete SLC 500 Spare Part

Technical Dossier

Product Details And Specifications

Allen-Bradley 1746-A13/B SLC 500 13-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 Allen-Bradley SLC 500 platform was the backbone of North American discrete manufacturing automation from the late 1980s through the 2000s. Tens of thousands of SLC 500 systems remain in active production service across automotive, food & beverage, water treatment, and general manufacturing facilities. The 1746-A13/B chassis is the largest standard chassis in the SLC 500 family, accommodating up to 13 I/O modules plus a processor and power supply. Its physical backplane architecture is not forward-compatible with any current Rockwell platform.

When this chassis fails — whether from backplane connector fatigue, physical damage, or age-related board degradation — there is no modern drop-in equivalent. The only path to restoring production without a full system migration is a direct replacement 1746-A13/B chassis. For plant managers operating under capital expenditure constraints or mid-cycle production schedules, sourcing a verified replacement chassis from a specialist supplier is the only operationally viable option. Rockwell Automation's own end-of-life documentation confirms that no migration path preserves the existing I/O wiring and program without significant re-engineering effort.

How to extend your SLC 500 system life by 5–10 years at a fraction of migration cost:

Condition & Reliability Assurance

Sourcing obsolete industrial hardware carries inherent risk. DriveKNMS applies a 5-step quality verification process to all SLC 500 chassis units before dispatch review:

1. Visual and mechanical inspection: Full examination of the backplane connector pins for corrosion, bending, or contamination. Chassis slot guides and module retention mechanisms are checked for physical integrity.
2. Backplane continuity test: Electrical continuity verification across all backplane signal lines to confirm no open or shorted traces from age or prior installation stress.
3. Electrolytic capacitor assessment: Inspection of any onboard capacitors for visible bulging, electrolyte leakage, or heat discoloration — the primary age-related failure mode in legacy industrial hardware.
4. Firmware and label verification: Confirmation that the revision suffix (/B) matches the physical hardware revision markings. Mixed-revision chassis components can cause compatibility issues with certain I/O modules.
5. Functional power-up test: Where test fixtures are available, chassis units are powered with a compatible 1746 power supply and processor to confirm backplane communication integrity before packaging.

Key Features for System Maintenance

Q: How do I know the unit is genuine and not counterfeit?
A: All units are inspected for authentic Rockwell Automation labeling, correct revision markings, and original manufacturing characteristics. We do not source from unverified brokers. Units are traceable to documented industrial decommissioning sources where possible.

Q: Can this chassis be used with a SLC 5/05 Ethernet processor?
A: Yes. The 1746-A13/B chassis is compatible with all SLC 500 processor series including the 1747-L551, L552, L553 (SLC 5/05) Ethernet processors.