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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 700-N400A1 / 700-NA40 Control Relay 4P NO 120VAC Bulletin 700
$35.00SKU: B-3-8-308Add to Cart -
Allen-Bradley 700-N400A1 Industrial Control Relay 4-Pole 110/120VAC
$35.00SKU: D-3-1-271Add to Cart -
Allen-Bradley 700-N400A1 Type N Industrial Control Relay 4NO 120V AC
$244.99SKU: D3-6-400Add to Cart -
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Allen-Bradley 700-P400A1 4-Pole AC Control Relay Series A/B Heavy-Duty NEMA
$38.00SKU: B-3-8-232Add to Cart -
Allen-Bradley 700-P800A1 AC Control Relay 8NO 120V Coil NEMA A600 Ser. E
$125.00SKU: D-3-4-112Add to Cart -
Allen-Bradley 700-P800A1 NEMA Heavy-Duty AC Relay 8NO 120V Coil A600 Ser. B
$95.00SKU: D-3-4-113Add to Cart -
Allen-Bradley 74102-405 Terminator Plug Digital Servo Controller GX B-V0A 94V-0
$25.00SKU: C-21-G-91Add to Cart -
Allen-Bradley 74102-481-51 Terminal Interface Board PCB 74102-480-04A Rev 03
$390.00SKU: A-2-2-313Add to Cart -
Allen-Bradley 7493391-1 Type O Potentiometer Single-Turn Vintage Trim Pot
$25.00SKU: B-1-2-348Add to Cart -
Allen-Bradley 800F-PX10 /A Contact Cartridge with Latch 22.5mm 690V
$34.99SKU: C-5-A-45Add to Cart -
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Allen-Bradley 800FM-LE3 Ser A Illuminated Push Button Green Lots of 9
$50.00SKU: B-2-7-135Add to Cart -
Allen-Bradley 800H-JRN5 /G 30mm 3-Position Selector Switch Base 800H PB
$75.00SKU: C-3-1-313Add to Cart -
Allen-Bradley 800H-JRN5 /G 30mm Selector Switch 3-Pos Spring Return Right
$75.00SKU: C-3-1-319Add to Cart -
Allen-Bradley 800T-H2D1 /T 30mm Selector Switch 2-Position Non-Illuminated
$60.00SKU: C-3-1-318Add to Cart -
Allen-Bradley 800T-JX20 /U 30mm 3-Position Selector Switch Operator Only
$95.00SKU: C-3-1-315Add to Cart -
Allen-Bradley 800T-JX20 /U 30mm Selector Switch 3-Position Spring Return
$95.00SKU: C-3-1-317Add to Cart -
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Allen-Bradley 802F-E60M2 /A Key Interlock Safety Switch 10A 500V AC
$105.00SKU: C-3-1-306Add to Cart
