Industrial Automation » Input/Output Modules

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Used plc peripheral modules

  • Wago 750-333 Profibus Fieldbus Coupler

    Wago 750-333 Profibus Fieldbus Coupler Module w/ Input & Output Modules D17

    • used

    • Manufacturer: Wago

    Wago Modules (1) 750-333 Profibus Fieldbus Coupler (3) 750-402 Input (4) 750-502 Output (1) 750-602 Power Supply (5) 750-504 Output (8) 750-492 Analog Input (5) 750-554 Analog Output (1) 750-454 Input (1) 750-600...

    $800 USD
    Springfield, NH
  • Trusted Seller
    Allen Bradley 1734-MB Series A

    Allen Bradley 1734-MB Series A Terminal Base

    • used

    • Manufacturer: Allen-Bradley
    • Model: 1734

    PLEASE REVIEW: We would ask that potential buyers please view the photographs carefully, and understand what you are buying. All questions must be submitted PRIOR to auction close. Your purchase includes a 30 day...

    $25 USD
    Suwanee, GA
  • Trusted Seller
    Siemens 6ES7 322-1HH01-0AA0 Simatic S7

    Siemens 6ES7 322-1HH01-0AA0 Simatic S7 Digital Output

    • used

    • Manufacturer: Siemens
    • Model: 6ES7

    PLEASE REVIEW: We would ask that potential buyers please view the photographs carefully, and understand what you are buying. Please submit all questions PRIOR to your purchase. Your purchase includes a 30 day war...

    $50 USD
    Suwanee, GA
  • Trusted Seller
    Allen Bradley 1734-AENTR Series B,

    Allen Bradley 1734-AENTR Series B, 2 Port Ethernet/IP TP I/O Adapter

    • used

    • Manufacturer: Allen-Bradley
    • Model: 1734

    PLEASE REVIEW: We would ask that potential buyers please view all of the photographs carefully, and understand what you are buying. All questions must be submitted PRIOR to auction close. Your purchase includes a...

    $250 USD
    Suwanee, GA
  • Emerson KJ3243X1-BK1 DeltaV Profibus DP

    Emerson KJ3243X1-BK1 DeltaV Profibus DP Interface Card NEW Open Box F2

    • new

    • Manufacturer: Emerson
    • Model: KJ3243

    NEW Open Box Emerson DeltaV Profibus DP Interface Card Cat #: KJ3243X1-BK1 12P4691X042 Rev F New in Original Open Box New (Other) Surplus, Excess Inventory Located at Bitter End Trading LLC in Springfield, NH See...

    $2,200 USD
    Springfield, NH
  • NEW Emerson KJ3243X1-BK1 DeltaV Profibus

    NEW Emerson KJ3243X1-BK1 DeltaV Profibus DP Interface Card - Sealed Bag E17

    • new

    • Manufacturer: Emerson
    • Model: KJ3243

    NEW Open Box Emerson DeltaV Profibus DP Interface Card Cat #: KJ3243X1-BK1 Rev F New in Original Open Box Static Bag with Intact Seal as Shown New (Other) Surplus, Excess Inventory Located at Bitter End Trading L...

    $2,700 USD
    Springfield, NH
  • 2025 Sealed Allen Bradley 5069-IF8

    2025 Sealed Allen Bradley 5069-IF8 /A Compact Logix 5000 Input Module

    • new

    • Manufacturer: Allen-Bradley

    2025 Sealed Allen Bradley 5069-IF8 /A Compact Logix 5000 Input Module In new working and cosmetic condition. Never used. I will ship within one business day. International buyers are welcome Feel free to ask any ...

    $700 USD
    Houston, TX
  • New Allen Bradley 1732ES-IB8XOBV4 Series

    New Allen Bradley 1732ES-IB8XOBV4 Series A ArmorBlock Input/Output Module

    • new

    • Manufacturer: Allen-Bradley

    “In new working and cosmetic condition. Tested and works. See pictures.” New Allen Bradley 1732ES-IB8XOBV4 Series A ArmorBlock Input/Output Module In new working and cosmetic condition. Never used. See pictures. ...

    $1,000 USD
    Houston, TX
  • Allen-Bradley 5069-OW16

    Allen-Bradley 5069-OW16

    • new

    • Manufacturer: Allen-Bradley
    • Model: 5069

    Sealed Allen Bradley 5069-OW16 /B CompactLogix 16-Ch Relay Output Module In new working and cosmetic condition. Never used. I will ship within one business day. International buyers are welcome Feel free to ask a...

    $600 USD
    Houston, TX
  • New Sealed Allen Bradley 1756-OF8H

    New Sealed Allen Bradley 1756-OF8H A ControlLogix HART Analog Output Module

    • new

    • Manufacturer: Allen-Bradley

    New Sealed Allen Bradley 1756-OF8H A ControlLogix HART Analog Output Module In new working and cosmetic condition. New sealed. Never used. See pictures. I will ship within one business day. International buyers a...

    $4,000 USD
    Houston, TX
  • New Sealed Allen Bradley 5094-IY8

    New Sealed Allen Bradley 5094-IY8 /B Flex 5000 Analog Input Module

    • new

    • Manufacturer: Allen-Bradley

    New Sealed Allen Bradley 5094-IY8 /B Flex 5000 Analog Input Module In new working and cosmetic condition. New sealed. See pictures. I will ship within one business day. International buyers are welcome. Feel free...

    $2,300 USD
    Houston, TX
  • Allen-Bradley Allen Bradley 1734-IB8S

    Allen-Bradley Allen Bradley 1734-IB8S

    • used

    • Manufacturer: Allen-Bradley
    • Model: 1734

    “Used. Clean unit. See pictures” 2022 Allen Bradley 1734-IB8S Point Guard I/O Safety Module In good working and cosmetic condition. Tested and works. See pictures. I will ship within one business day. Internation...

    $1,000 USD
    Houston, TX
  • New Sealed Allen Bradley 5094-IF4IHS

    New Sealed Allen Bradley 5094-IF4IHS A Safety 4-CH Isolated Hart Input Module

    • new

    • Manufacturer: Allen-Bradley

    New Sealed Allen Bradley 5094-IF4IHS A Safety 4-CH Isolated Hart Input Module In new working and cosmetic condition. Never used. New sealed. See pictures. I will ship within one business day. International buyers...

    $3,000 USD
    Houston, TX
  • Allen-Bradley Allen Bradley 1734-IB8S 1B8S

    Allen-Bradley Allen Bradley 1734-IB8S 1B8S IBBS

    • used

    • Manufacturer: Allen-Bradley
    • Model: 1734-IB8S B

    “In good working and cosmetic condition. Tested and works. See pictures.” Allen Bradley 1734-IB8S 1B8S IBBS Ser B POINT I/O Safety Input Module 8 Point In good working and cosmetic condition. Tested and works. Se...

    $1,000 USD
    Houston, TX
  • Output Module Omron C20H-OD219 –

    Output Module Omron C20H-OD219 – New (without original box), 24 VDC

    • new

    • Manufacturer: Omron

    Omron C20H-OD219 digital output module, designed for industrial applications with PLC systems. It allows switching of 24 VDC resistive loads, with a capacity of 0.1 A per point and up to 6.4 A per unit. Ideal for...

    $132 USD
    San Diego, CA
678910

Overview

Input/Output (I/O) modules are essential components in industrial automation systems. They serve as the interface between various field devices and the control system, allowing the exchange of data and signals. I/O modules can handle both analog and digital inputs and outputs, making them crucial for monitoring and controlling processes in manufacturing, energy, and other sectors.

FAQ

What should I consider when buying an I/O module?

Consider the compatibility with your existing control system, the number of input and output channels, and the type of signals (analog or digital) it supports. Reliability and ease of integration are also important factors.

How do I ensure the I/O module is shipped safely to my location?

Use a reputable shipping service that specializes in electronics. Ensure the module is properly packaged with anti-static materials and secured to prevent damage during transit.

What is the maintenance schedule for an I/O module?

Regular maintenance includes inspecting connections for wear or corrosion, ensuring the module is clean and free from dust, and checking for any firmware updates from the manufacturer. Consult the manufacturer’s manual for detailed maintenance intervals.