Allen-Bradley PLC · Sourcing · Migration
Allen-Bradley PLC-5 (1785) Sourcing & Replacement Support
PLC-5 processors and 1771 I/O still run process and utility lines across industry. With Rockwell hardware discontinued and software support ended, Star Automations supports sourcing of 1785 processors and 1771 modules, repair evaluation, and migration review toward ControlLogix.
What the PLC-5 platform is
The Allen-Bradley PLC-5 is a large installed PLC platform built around 1785-Lxx processors with 1771-series racks, I/O modules and power supplies. A substantial process and utility installed base continues to run on it, which is why spares and support are still requested daily.
Why demand exists now
- Rockwell officially discontinued PLC-5 hardware in February 2022, and software support ceased on 31 December 2025 (per surecontrols.com).
- Obsolete-PLC enquiries are among the most common field requests, and spare parts for these systems are increasingly scarce (per industrialautomationco.com).
- Rockwell’s knowledge base lists processors such as the 1785-L11B, L30B, L20C15, L40L and L46B as end-of-life since 2010, so replacement planning is a live concern for many plants.
Your routes with Star Automations
Sourcing path
Request a search for 1785-Lxx processors, 1771 racks, I/O modules or power supplies. The exact catalog number from the module drives the search; availability is confirmed per request and no stock is claimed on this page.
Repair path
For a faulty processor or module, a repair evaluation is available. Send the catalog number and the fault behaviour; repairability is confirmed per unit.
Replacement / migration
Rockwell’s migration direction for PLC-5 is the ControlLogix platform. Migration involves program conversion and hardware redesign — Star Automations supports the review and planning rather than a drop-in swap.
What to send for a quote
The exact catalog number printed on the module (e.g. 1785-L30B or 1771-IA16), the rack/slot context if known, and quantity needed. A photo of the module label via WhatsApp is the fastest way to start.
Allen-Bradley PLC-5 — answers
Is the PLC-5 discontinued?
Yes. Rockwell officially discontinued PLC-5 hardware in February 2022 and ended software support on 31 December 2025 (per surecontrols.com).
Is support really ended?
Software support for the PLC-5 ceased on 31 December 2025. Hardware had already been discontinued in February 2022, which is why spares are sourced from the market rather than the factory.
Can you source 1785 / 1771 spares?
Sourcing is confirmed per request. Send the exact catalog numbers and Star Automations will search its sourcing network; no stock is claimed on this page.
Can PLC-5 modules be repaired?
Repair is evaluated per unit. Send the catalog number and fault details and Star Automations confirms whether repair is practical.
What information do you need for a quote?
The exact catalog number from the module, the rack/slot context, quantity, and your application. A label photo via WhatsApp is the fastest start.
Looking for another part? Search the catalogue by part number, brand or model, browse the shop home, or ask Ask Star AI for guidance.
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