Reliance Electric
61C542A
Reliance Electric 61C542A 57459-1 AutoMax 16 Channel Analog Input Module 10VDC
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PLC I/O Modules
710 listings · 584 in stock
710 PLC I/O modules listings from the brands you use, each one photographed. Free shipping to all 50 US states.
Reliance Electric
45C40
Reliance Electric AutoMate 45C40 Dual 115VAC/DC Input Module 802811-RB PLC
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Schneider Electric
TSXDSY32T2K
Schneider TSXDSY32T2K Modicon Premium 32-Point Digital Output Module 24VDC 0.1A
Out of stock
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Schneider Electric
TSXDEY32D2K
Schneider TSXDEY32D2K Modicon Premium 32-Point Digital Input Module 24VDC Sink
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Siemens
6ES7421-1BL01-0AA0
Siemens 6ES7421-1BL01-0AA0 Simatic S7-400 SM 421 Digital Input Module 32 DI 24V
Out of stock
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Mitsubishi
A1SX40
Mitsubishi A1SX40 MELSEC PLC Input Module 16 Point DC 12/24V Industrial Control
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AEG
AS-BDAP-208
AEG Modicon DAP 208 AS-BDAP-208 Discrete Relay Output Module 8x24VDC 230VAC PLC
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Spectrum Controls
8000 RDI-332
Spectrum Controls 8000 RDI-332 32 Channel 120VAC/DC Digital Input Module SY/MAX
Out of stock
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GE Fanuc
IC655MDL555A
GE Fanuc IC655MDL555A Series Five PLC Output Module 12-24VDC 16 Point Automation
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Allen-Bradley
1771-OW
Allen-Bradley 1771-OW Selectable Contact Output Module 8-Point PLC-5 1771 Series
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Foxboro
2AT-SBU-FGB
Foxboro 2AT-SBU-FGB SPEC 200 Output Module Standby Card Industrial Control PLC
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Allen-Bradley
1771-IA
Allen-Bradley 1771-IA Series C 120V AC Input Module PLC-5 Rockwell Automation
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Foxboro
P0400YC
Foxboro P0400YC FBM2 REV-0Y Thermocouple Input Module I/A Series Industrial DCS
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Hima
985210222
Hima Himax X-DI 16 01 Digital Input Module 985210222 16 Point Safety PLC Control
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Foxboro
DM400YJ
Foxboro DM400YJ FBM 8 I/A Series Input Module 120VAC Rev 0D Field Bus Control
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Schneider Electric
140ACO02000
Schneider Electric 140ACO02000 TSX Quantum Analog Output Module 4CH Current PLC
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Schneider Electric
140DRC83000
Schneider Electric 140DRC83000 TSX Quantum Relay Discrete Output Module 8x1 PLC
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Giddings & Lewis
PIC900
Giddings and Lewis PiC900 502-03549-00R3 24VDC 16PT Output Module PLC Used
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Fanuc
A03B-0801-C125
Fanuc A03B-0801-C125 ID16D Input Module 24VDC 16 Point PLC Industrial Automation
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Siemens
6ES7322-1BH01-0AA0
Siemens Simatic S7-300 6ES7322-1BH01-0AA0 SM322 16DO Output Module Parts Repair
Out of stock
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GE Fanuc
IC600FP804K
GE Fanuc IC600FP804K Series Six Faceplate 115VAC AC/DC Input Module Front Panel
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Horner
HE800DAC001B
Horner HE800DAC001B HE800DAC001 Analog Output Module Industrial PLC OCS OEM
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Square D
8030 RIM-101
Square D 8030 RIM-101 SyMax 120VAC Input Module Series C1 Industrial PLC Card
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Square D
8030-LIM-112
Square D Symax 8030-LIM-112 Input Module Industrial PLC Control Automation OEM
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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 PLC I/O Modules
- 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
- TroubleshootingPLC I/O Module Fault or Not Responding: First ChecksModule status LEDs on ControlLogix, SLC 500, S7-300 and S7-1500 I/O, the Logix connection codes (16#0204, keying 16#0114/0116), power, slot, keying and field wiring checks.
- 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.
- 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.