Allen-Bradley
1794-ASB
Allen-Bradley 1794-ASB Flex I/O RIO Adapter 24VDC 8 Modules 230.4Kbps DIN Rail
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1794-ASB is back
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
45C166
Reliance Electric 45C166 AutoMate Dual Contact Output Module N.C. 250V 3A AC 4A
Out of stock
Sourcing on request
Notify me when Reliance Electric 45C166 is back
Allen-Bradley
1771-OBD
Allen-Bradley 1771-OBD PLC-5 DC Output Module 16 Point 10-60VDC 2A 8A Ser C B02
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1771-OBD is back
Mitsubishi
A6TBXY36
Mitsubishi A6TBXY36 PLC Terminal Block 32-Point Sink Input/Output 1-Wire M3.5
Out of stock
Sourcing on request
Notify me when Mitsubishi A6TBXY36 is back
Allen-Bradley
1794-TB3
Allen-Bradley 1794-TB3 Ser. A FLEX I/O Terminal Base Unit 120VAC 10A 16 Channel
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1794-TB3 is back
Allen-Bradley
1769-IQ16
Allen-Bradley 1769-IQ16 Ser A 16-Point Input Module 24VDC 0.115A Compact I/O PLC
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1769-IQ16 is back
Dr-
ODC24
Opto 22 ODC24 DC Output I/O Module 60 VDC 1.5 A 4 Pin Industrial Automation Part
Out of stock
Sourcing on request
Notify me when Dr- ODC24 is back
Allen-Bradley
1794-TB3
Allen-Bradley 1794-TB3 Ser A FLEX I/O 3-Wire Terminal Base 120VAC 10A 5VDC 640mA
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1794-TB3 is back
Allen-Bradley
1794-OW8
Allen-Bradley 1794-OW8 Ser. A Flex I/O 8 Point Relay Output Module 24V DC 2A PLC
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1794-OW8 is back
Modicon
AS-B882-239
Modicon AS-B882-239 High Speed Counter Module 2 Point PLC AEG Gould Automation
Out of stock
Sourcing on request
Notify me when Modicon AS-B882-239 is back
Allen-Bradley
1734-OB4E
Allen-Bradley 1734-OB4E Ser C Point I/O 4-Channel 24VDC Sourcing Output Module
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1734-OB4E is back
Allen-Bradley
1769-IF4
Allen-Bradley 1769-IF4 Ser B Rev 2 Compact I/O 4-Channel Analog Input Module PLC
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1769-IF4 is back
GE Fanuc
IC693MDL940L
GE Fanuc IC693MDL940L Series 90-30 Output Relay Module 16 Point 2A Automation
Out of stock
Sourcing on request
Notify me when GE Fanuc IC693MDL940L is back
Allen-Bradley
1769-OF2
Allen-Bradley 1769-OF2 Ser B Compact I/O 2-Channel Analog Output Module PLC Part
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1769-OF2 is back
Square D
8030 ROM-221
Square D SY/MAX 8030 ROM-221 Series F2 Output Module 120VAC 30619-502-50 PLC I/O
Out of stock
Sourcing on request
Notify me when Square D 8030 ROM-221 is back
Square D
8030 ROM-221
Square D SY/MAX 8030 ROM-221 Output Module Series F1 120VAC 2A/Output 16A/Module
Out of stock
Sourcing on request
Notify me when Square D 8030 ROM-221 is back
Reliance Electric
45C69
Reliance Electric 45C69 AutoMate Dual Dry Contact Output Module 125VAC 57666-A
Out of stock
Sourcing on request
Notify me when Reliance Electric 45C69 is back
Allen-Bradley
1734-TOPS
Allen-Bradley 1734-TOPS Ser. A POINT I/O Terminal Base 8 Spring Clamp 28-14 AWG
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1734-TOPS is back
Omron
C200H-OC224
Omron C200H-OC224 PLC Relay Output Module 8 Point 250VAC/24VDC 2A/Pt 16A/Unit
Out of stock
Sourcing on request
Notify me when Omron C200H-OC224 is back
Allen-Bradley
1734-TOPS
Allen-Bradley 1734-TOPS Ser. A POINT I/O One-Piece Terminal Base 8 Spring Clamp
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1734-TOPS is back
Siemens
S5 6ES5
Siemens Simatic S5 6ES5 451-8MA11 Digital Output Module 8 Point 24VDC 1A PLC
Out of stock
Sourcing on request
Notify me when Siemens S5 6ES5 is back
Reliance Electric
45C69
Reliance Electric 45C69 57666-A AutoMate Dual Dry Contact Output Module 125VAC
Out of stock
Sourcing on request
Notify me when Reliance Electric 45C69 is back
Reliance Electric
45C166
Reliance Electric AutoMate 45C166 Dual Contact Output Module 250V 3A PLC Part
Out of stock
Sourcing on request
Notify me when Reliance Electric 45C166 is back
Allen-Bradley
1734-TOPS
Allen-Bradley 1734-TOPS Series A POINT I/O Terminal Base Spring Clamp 8 Terminal
Out of stock
Sourcing on request
Notify me when Allen-Bradley 1734-TOPS is backGet a quote on PLC I/O Modules
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.