Used Allen-Bradley SLC 500 PLCs and Modules

The Allen-Bradley SLC 500 category is for visitors looking for used PLC equipment and related components for existing automation systems. Compare each listing with the exact hardware installed in your plant and the requirements of your application. The category name does not mean that every CPU or module is available; check the individual listing for current availability and condition.

CPU, Module and System Compatibility

The SLC 500 family includes processors, I/O modules, chassis, power supplies and communication components. For CPU selection, the “SLC 500” name alone is insufficient. Review the complete catalogue number, series/revision details, memory capacity and existing system requirements together. When comparing new PLC models, do not assume that they are direct replacements.

For used digital I/O modules, check the input/output type, channel count and electrical ratings. For used power supplies, check the supply requirements and system capacity. Assess 1746 modules together with the chassis and CPU. Review the photographs and description for missing terminals, connectors or accessories.

Communication compatibility also matters. Check the processor connections, protocol and existing used HMI panel connection for the specific models involved. A program backup, project access and required software/licences are separate from the hardware purchase. Consult the manufacturer's documentation for RSLogix 500 requirements; do not assume that software, a licence or an application program is included unless the listing explicitly states this.

Product Lifecycle and Upgrade Options

Rockwell Automation states that some SLC 500 catalogue numbers have been discontinued and provides migration options. Check the product lifecycle status using the complete catalogue number. Visit the official SLC 500 page for manufacturer information. A platform migration may require planning for the program, I/O, communication and commissioning.

For general brand background, see About Allen-Bradley. Otomasyon AVM is not an authorised Allen-Bradley representative. We do not provide technical support, programming or application consulting for the equipment in this category.

Item Condition, Test Information and Contact

Your contact for an item is the store identified on its product page. Contact that store about pricing, availability, delivery, accessories and available test information. Read any test notes in the listing. A recorded test does not mean that every function or compatibility with your application has been verified. Faulty items may also be offered with their condition disclosed.

We provide no additional commercial warranty for second-hand items, including unused or boxed equipment. Review the terms for the specific item. Listings may be updated at approximately 10-day intervals, so a sold item can briefly remain displayed as available. Obtain stock confirmation before ordering.

Would You Like to Sell Your SLC 500 Equipment?

Email the complete product codes, quantities, condition details, photographs and asking prices of the equipment you wish to sell to otomasyonavm@gmail.com. We do not purchase equipment without an invoice. Include invoice information in your offer. The owner sets the asking price; the information submitted will be reviewed for a possible purchase. Visitors cannot directly list their own products for sale on the website.

Browse Used Equipment by Category and Explore New Products

The Used Models page groups equipment by product category rather than by brand. Browse used PLC CPUs and used variable frequency drives from this page.

To explore new equipment, visit our PLC and HMI products, new operator panels, power supplies, industrial sensors, control devices and new AC drives. A used component can cost more than some new options; assess compatibility and the total upgrade cost together.