Allen-Bradley
1756-CNB/D
Allen-Bradley 1756-CNB/D ControlLogix ControlNet Bridge Communication Module PLC
Out of stock
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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
1756-ENBT
Allen-Bradley 1756-ENBT Ser A ControlLogix Ethernet/IP Communications Bridge PLC
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Allen-Bradley
1747-L20C
Allen-Bradley 1747-L20C Ser C SLC 500 Processor w/ 1746-A2 Ser A 2-Slot Chassis
Out of stock
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Siemens
6AV1242-0AB10
Siemens 6AV1242-0AB10 Simatic S5 Color Video Module CP527 Communication Card
Out of stock
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Allen-Bradley
1772-LX
Allen Bradley 1772-LX Mini-PLC-2/16 Processor Module Ser C Firmware Rev D PLC
Out of stock
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Allen-Bradley
1771-IB
Allen Bradley 1771-IB PLC-5 DC Input Module 12-24VDC 8-Point Industrial Control
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Allen-Bradley
1771-AR
Allen Bradley 1771-AR PLC-5 Remote I/O Adapter Module Series A Firmware Rev B
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Siemens
6ES5700-1LA1
Siemens 6ES5700-1LA1 SIMATIC S5 CR1 Central Controller 7-Slot Card Rack Module
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Gould
B243-105
Gould Modicon B243-105 A/D Converter 5VDC PLC Module Industrial Input Analog OEM
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Kuka
NM100AB
KUKA NM100AB Servo Axis Drive 69-223-800 Robot Controller Industrial Module OEM
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Allen-Bradley
PC-673-0995
Allen Bradley PC-673-0995 1394 Motion Drive CPU Board Card Industrial OEM Part
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Siemens
TI305-017
Siemens TI305-017 Input Module PLC Controller 305 Series Texas Instruments DC
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HP
M1088-66501
HP Agilent M1088-66501 RS-232 Interface Card Patient Monitor Rack Board Module
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Industrial part
11021
Acola 11021 CoBox Ethernet Network 2-Kanal Module Communication 15V-AC Lantronix
Out of stock
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Request a quote: 11021
ifm
IE5207
IFM Efector IE5207 Inductive Proximity Sensor M18 Industrial Automation Part PLC
Out of stock
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Westinghouse
233P746H01F
Westinghouse 233P746H01F Style 1870A93 Module Buffalo Power Electronics Control
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Measurex
05319100
Measurex High Density Contact Output Buffer Board 05319100 Rev B Honeywell PLC
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Uson
40L05X3B
Uson SSHD PROM Solid State Harddrive Module 40L05X3B 4300
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Phoenix Contact
2767972
Phoenix Contact 2767972 IBS 24 DO I Interbus-S Digital Output Module Ident 129
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Honeywell
621-2101R
Honeywell 621-2101R Isolated Digital Output Module 6-Point 115VAC PLC TDC 3000
Out of stock
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Modicon
B855
Modicon PLC Input Module 12 VDC B855 AS-B855-016 Each
Out of stock
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WAGO
289-141
WAGO 289-141 Terminal Connection Module Block Fieldbus 07 643 146 00 20 PLC DIN
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Industrial part
070-137901-A
Tecrol 070-137901-A Industrial Power Supply Module Automation Replacement OEM
Out of stock
Sourcing on request
Request a quote: 070-137901-A
Honeywell
621-0015
Honeywell 621-0015 Isolated Analog Input Module 8-Point Industrial PLC TDC DCS
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.