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Learn moreAllen-Bradley Parts for Sale
PLC Machinery carries one of the deepest selections of surplus, used, and obsolete Allen-Bradley (Rockwell Automation) parts in the country — ControlLogix, CompactLogix, PowerFlex, Kinetix, PanelView, POINT I/O, FLEX I/O, and legacy PLC-5 and SLC 500 hardware. Discontinued lines Rockwell no longer makes are often on our shelf today instead of a 20-week lead time. Every part is graded by condition, backed by our own 90-day warranty, and ships same day. Not sure a unit is genuine? Read our guide on how to spot counterfeit Allen-Bradley parts.
Shop by Allen-Bradley Product Family
Frequently Asked Questions
Are used Allen-Bradley PLCs reliable?
Yes. Allen-Bradley hardware is built for decades of industrial service, and a sound surplus unit performs no differently than one bought new. The key is buying from a source that grades condition honestly and stands behind the part — which we do.
Can you source obsolete or discontinued Allen-Bradley parts?
Yes — it's our specialty. Discontinued lines like PLC-5, SLC 500, and older MicroLogix and PowerFlex families are no longer manufactured, but they're still running in thousands of facilities. If you don't see a discontinued part listed, contact us; we may have it or be able to find it.
How do I know I'm getting genuine Allen-Bradley and not a counterfeit?
Counterfeit Allen-Bradley is a real problem on the open market. We inspect every unit for authenticity before it's listed and grade its condition transparently. For the full walkthrough, read our guide on how to spot counterfeit Allen-Bradley parts.
Do you test parts before shipping?
Most surplus parts are inspected and sold as-is rather than functionally tested, and are priced accordingly; items we do bench-test are marked. Either way, every part is backed by our 90-day warranty, so if something doesn't work, you're covered.
What warranty do you offer?
All parts carry our own 90-day PLC Machinery warranty — our coverage, not a Rockwell factory warranty.
What do your condition grades mean?
Surplus – Original Packaging: surplus stock in the manufacturer's original box. Surplus – Open Box: surplus stock, original packaging opened. Used: previously installed, inspected.
ControlLogix vs. CompactLogix — what's the difference?
ControlLogix (1756) is the rack-based, high-performance platform for large or complex systems; CompactLogix (1769) is the compact, cost-effective controller for small-to-mid applications. Both program in Studio 5000.
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Allen-Bradley 1746-IA8 /A SLC 500 8Pt AC Input Module 85-132V 120V AC
$75.00SKU: C-3-1-403Add to Cart -
Allen-Bradley 1746-IB16 Series C SLC500 Input Module (lot of 11) 6 With Doors
$219.99SKU: B-2-7-185Add to Cart -
Allen-Bradley 1746-IV16 /C SLC 500 16-Point DC Input Module 10–30VDC
$35.00SKU: C-3-1-289Add to Cart -
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Allen-Bradley 1746-IV16 SLC 500 16-Channel Digital DC Input Module 10-30 VDC
$95.00SKU: C-3-10-210Add to Cart -
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Allen-Bradley 1746-NI8 /A SLC 500 Analog Input Module 8 Channel FRN 2.0
$805.00SKU: A-2-1-478Add to Cart -
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Allen-Bradley 1746-OA8 SLC500 AC Output Module 8-Point C-8730-4251-3 SER. A
$695.00SKU: B-4-2-187Add to Cart -
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Allen-Bradley 1747-L543 SLC 5/04 CPU Processor – Series C FRN 10 (Missing Door)
$375.00SKU: B-4-2-72Add to Cart -
Allen-Bradley 1747-SN /B SLC 500 Remote I/O Scanner Module FRN 1.0b
$145.00SKU: C-3-1-405Add to Cart -
Allen-Bradley 1756-CNB Ser D ControlLogix ControlNet Bridge Module
$60.00SKU: B-2-7-116Add to Cart -
Allen-Bradley 1756-DNB /A ControlLogix DeviceNet Communication Module No Door
$135.00SKU: C-3-12-24Add to Cart -
Allen-Bradley 1756-ENBT / 1756-ENBT /A ControlLogix EtherNet/IP Bridge Module
$325.00SKU: B-4-2-186Add to Cart
