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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 1794-IB10XOB6 Series A Flex I/O Sink Input/Source Output
$159.99SKU: B-3-7-197Add to Cart -
Allen Bradley 1794-IB16 Ser A Input Module 1794-TB32 Ser A Terminal Base
$127.09SKU: A-4-1-79Add to Cart -
Allen Bradley 1794-IB8 Series A Flex 8 Point Digital Input Module Rockwell
$81.17SKU: A-4-1-81Add to Cart -
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Allen Bradley 1794-IT8 Series A Flex 8 Thermocouple Input Module Sealed
$3,674.99SKU: B-3-7-325Add to Cart -
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Allen Bradley 1794-OB16D 16-Point DC Output Module Diagnostics Ser A
$85.00SKU: C-5-D-39Add to Cart -
Allen Bradley 1794-OF4I Series A Output Module (Mismatched Serial Number Box)
$694.99SKU: B-3-7-311Add to Cart -
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Allen Bradley 1794-TBN Series A AB Flex Terminal Base Rockwell Automation
$99.99SKU: C-3-11-77Add to Cart -
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Allen Bradley 193-EEBB Series C AB E1 Plus Overload Relay Rockwell Automation
$194.99SKU: C-3-11-25Add to Cart -
Allen Bradley 193132 Rev 05 PowerFlex 700 AC Drive Control Board Industrial Use
$74.99SKU: B-3-6-208Add to Cart -
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Allen Bradley 193202-A03 Power Board for PLC & Machine Control Industrial Use
$614.18SKU: B-3-6-211Add to Cart -
Allen Bradley 194-832 942031-11 MAN59246A 4012794062 Circuit Board 410767
$399.99SKU: D-4-6-60Add to Cart
