Used PLCs & Automation Controllers For Sale
Used and surplus PLCs from Allen-Bradley, Siemens, Mitsubishi, and Omron — processors, I/O modules, racks, power supplies, and HMI panels, including discontinued legacy lines.
Keep legacy lines running and new projects on budget across Canada and the United States.
Available PLCs & Controllers
What We Stock
Why Buy Used PLCs?
When a 20-year-old SLC 500 processor fails, the production line doesn't care that the product is discontinued. The used and surplus market is often the only realistic way to keep legacy control systems running without a full migration project — and current-generation hardware like ControlLogix costs far less used than new.
Our PLC inventory comes from plant decommissioning and panel teardowns, so modules are pulled from working systems. Listings clearly state series, revision, and firmware where applicable, so you can match your installed base exactly.
- Lifeline hardware for discontinued lines (SLC 500, PLC-5, MicroLogix)
- Lower cost on current ControlLogix and CompactLogix hardware
- Series and revision matched to your installed base
- Pulled from working panels during decommissioning
Popular PLC Families
Allen-Bradley ControlLogix & CompactLogix
1756 and 1769 processors, I/O, communication modules, and chassis — the workhorses of North American automation, available at deep discounts to list.
Legacy Allen-Bradley: SLC 500, PLC-5, MicroLogix
Discontinued but everywhere. We stock processors, I/O cards, racks, and power supplies that keep legacy lines alive without a rip-and-replace migration.
Siemens, Mitsubishi & Omron
Siemens S7-300/S7-1200/S7-1500, Mitsubishi FX and Q-series, and Omron CJ/CP controllers and I/O for mixed-vendor facilities.
Frequently Asked Questions About Used PLCs
Common questions about buying used and surplus PLC hardware
How much do used Allen-Bradley PLCs cost?
Typical asking prices on the used market (October 2026): SLC 5/03 (1747-L532) processors $150–$300 and SLC 5/05 (1747-L552) $1,000–$1,300; MicroLogix 1100 and 1400 controllers $200–$600; ControlLogix L6x processors $50–$300 and L7x processors $750–$1,500. Common 1756 digital I/O cards start around $50; specialty and analog modules run higher.
Do you have discontinued PLC parts like SLC 500 and PLC-5?
Yes — legacy Allen-Bradley is one of our strongest categories. Because Rockwell has discontinued the SLC 500 and PLC-5 families, surplus stock is the primary source for replacements. We carry processors, I/O, racks, and power supplies, and can source specific catalog numbers on request.
How do I confirm the firmware revision of a used PLC?
Listings include series and firmware revision when visible, and we'll photograph labels on request so you can verify compatibility with your existing program and RSLogix/Studio 5000 version before buying.
Should I buy new-surplus or used PLC hardware?
New-surplus (open-box or unused stock from closed projects) offers like-new reliability at a discount and is ideal for spares. Used modules cost less and are usually the only option for discontinued lines. We label each listing's condition clearly so you can choose by criticality and budget.
Can you buy our decommissioned control panels?
Absolutely. We purchase complete control panels, MCC buckets, spare PLC cribs, and automation hardware from plant closures and upgrades. Send photos and a parts list for a quote — we handle removal logistics for larger lots.
Have Surplus PLCs or Control Panels to Sell?
We buy Allen-Bradley, Siemens, Mitsubishi, and Omron hardware — single processors to entire spare-parts cribs and control panels from decommissioned lines.
