Allen-Bradley
1785-L20B
Allen-Bradley 1785-L20B PLC-5/20 Processor Module Ser C 2.3A 5VDC 16K 512 I/O
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PLCs & Automation
2,686 listings · 2,257 in stock
2,686 PLCs & Automation listings in 6 categories, from makers like Allen-Bradley, Siemens, Mitsubishi. Surplus, used and new-surplus, every item photographed. Free shipping to all 50 US states and zero lead time on everything in stock.
Categories in PLCs & Automation
Allen-Bradley
1734-TOPS
Allen-Bradley 1734-TOPS Ser. A POINT I/O Terminal Base 8 Spring Clamp 28-14 AWG
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Allen-Bradley
1769-ECR
Allen-Bradley 1769-ECR End Cap Terminator Compact I/O Ser A Rev 2 5VDC 0.005A
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Omron
C200H-OC224
Omron C200H-OC224 PLC Relay Output Module 8 Point 250VAC/24VDC 2A/Pt 16A/Unit
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Allen-Bradley
1734-TOPS
Allen-Bradley 1734-TOPS Ser. A POINT I/O One-Piece Terminal Base 8 Spring Clamp
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Allen-Bradley
1769-L35E
Allen-Bradley 1769-L35E Ser A CompactLogix Controller 1.5MB EtherNet/IP RS-232
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Foxboro
P0917YZ
Foxboro P0917YZ FCP270 Field Control Processor I/A Series 24VDC 8W Rev 0U 60C
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Foxboro
P0917YZ
Foxboro Invensys P0917YZ FCP270 Field Control Processor I/A Series DCS Module
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Siemens
S5 6ES5
Siemens Simatic S5 6ES5 451-8MA11 Digital Output Module 8 Point 24VDC 1A PLC
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Schunk
160-1-AS
Schunk PGN+P 160-1-AS 318594 Pneumatic 2 Finger Parallel Gripper Robotic Arm
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Allen-Bradley
1756-PA75/B
Allen-Bradley 1756-PA75/B ControlLogix AC Power Supply 85-265VAC Series B PLC
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Reliance Electric
45C69
Reliance Electric 45C69 57666-A AutoMate Dual Dry Contact Output Module 125VAC
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Reliance Electric
45C166
Reliance Electric AutoMate 45C166 Dual Contact Output Module 250V 3A PLC Part
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Allen-Bradley
1492-CM1771-LD011
Allen-Bradley 1492-CM1771-LD011 Swing-Arm Conversion Module 16-Point Output PLC
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Beckhoff
BK3150
Beckhoff BK3150 PROFIBUS DP Bus Coupler Module Industrial Automation PLC Control
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Allen-Bradley
1747-L531
Allen-Bradley 1747-L531 Ser E Rev 8 SLC 500 5/03 Processor CPU 1747-OS302 FRN 8
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Allen-Bradley
1734-TOPS
Allen-Bradley 1734-TOPS Series A POINT I/O Terminal Base Spring Clamp 8 Terminal
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Allen-Bradley
1769-IQ16
Allen-Bradley 1769-IQ16 Ser A Compact I/O 16 Point 24VDC Input Module PLC Part
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Konsei
HMA-03AS-N0
Konsei Kondo HMA-03AS-N0 Mini Parallel Hand Pneumatic Gripper Air Chuck Robotic
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Siemens
3RG9002-0DA00
Siemens 3RG9002-0DA00 AS-Interface Module 4E/4A 4 Input 4 Output PNP 24VDC F90
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Allen-Bradley
1769-ECR
Allen-Bradley 1769-ECR Ser A CompactLogix Compact I/O Right End Cap Terminator
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Allen-Bradley
1769-IQ16
Allen-Bradley 1769-IQ16 Ser A Compact I/O 16 Pt 24VDC Sink/Source Input Module
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GE Fanuc
IC697PWR710B
GE Fanuc IC697PWR710B Series 90-70 Power Supply 55W 5V PLC Module A208-1002-0680
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Schunk
318856
Schunk PGN-Plus-E 100-1 318856 Electric 2 Jaw Parallel Gripper 24V DC Robot Arm
Out of stock
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Need more units than we list, a part you don't see here, or prices for a whole list? Send us the part numbers and quantities and we reply within 1 hour during business hours (Mon to Fri 9 to 4:30 CT).
Guides for PLCs & Automation
- Legacy PLCsSLC 500 End of Life: Keep Running or Migrate?Where the SLC 500 stands, which spares keep one running, and how a phased move to CompactLogix keeps downtime short.
- Parts identificationHow to Read an Allen-Bradley Catalog Number & SeriesBulletin numbers, module codes, suffixes, the series letter and firmware revision, and how each one affects whether a replacement will work.
Troubleshooting guides
- TroubleshootingControlLogix & CompactLogix Major Fault Codes ExplainedMajor fault types and codes (T01 power-up to T07 memory), where to read them in Studio 5000, minor vs major vs I/O faults, the first checks and clearing a fault safely.
- TroubleshootingSiemens S7-300/S7-400 SF & BF LEDs and Diagnostic BufferSF vs BF (and INTF, EXTF, BUSxF on the S7-400), steady vs flashing, reading the diagnostic buffer in STEP 7, and the first checks for modules, PROFIBUS, PROFINET and backup batteries.
- TroubleshootingPLC Won't Go to RUN? Allen-Bradley Mode and Fault ChecksKeyswitch and mode-switch positions, the faults that block RUN, firmware and project mismatches, missing or wrong I/O modules, forces, and the order to check them in.
- TroubleshootingAllen-Bradley PLC Battery Low: Which Battery and Safe SwapThe battery for each controller family, what the BAT or BATT LED and the T10:C10 minor fault mean, how long you have, replacing it safely, and whether the program survives.