Industrial Automation » Input/Output Modules

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Used electrical control modules

  • Trusted Seller
    Reliance Electric 57409-D Analog Input

    Reliance Electric 57409-D Analog Input Module 2-Channel PLC A/D 57C409 (GA0178-1)

    • Manufacturer: Reliance Electric

    Reliance Electric MPN: 57409-D USED Analog Input Module 2-Channel -Nameplate Information- Isolated Control A/D B/M 57409 - D Manual J-3637 M/N 57C409 Max Input: +/- 15 VDC ST Approximate Dimension: 13.5 x 7.5 x 1...

    $51 USD
    Chattanooga, TN
  • Reliance Electric 57666-A (45C69) Dual

    Reliance Electric 57666-A (45C69) Dual Dry Contact Output Module Loc 3E-27

    • Manufacturer: Reliance Electric

    Reliance Electric 57666-A Dual Dry Contact Output Module Controller 45C69. Loc 3E-27 *There is one without front. See fotos. We repair all types of industrial automation including AC Servo Drives, Servo Motors...

    $100 USD
    Duncan, SC
  • RELIANCE,45C66A,DUAL CONTACT OUTPUT MODULE

    RELIANCE,45C66A,DUAL CONTACT OUTPUT MODULE

    • Manufacturer: Reliance Electric

    What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

    $15 USD
    Galion, OH
  • RELIANCE,57C421B,PULSETACH INPUT MODULE NEW

    RELIANCE,57C421B,PULSETACH INPUT MODULE NEW

    • Manufacturer: Reliance Electric

    What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

    $450 USD
    Galion, OH
  • Schneider Electric 140DDI35300 24V Discrete

    Schneider Electric 140DDI35300 24V Discrete DC Input Module. 3A-14

    • Manufacturer: Schneider Electric

    Schneider Electric 140DDI35300 24V Discrete DC Input Module. OEM spares from a brewery/ bottling plant maintenance room's canceled expansion project tool crib. We repair all types of industrial automation includi...

    $310 USD
    Duncan, SC
  • Trusted Seller
    Aventics Input Module - 240-205

    Aventics Input Module - 240-205

    • Manufacturer: Aventics

    New No Box Name: Input Module | Arrival date: 10-14-2025 | Dimensions l x w x h (inches): 6 x 7 x 3 | Weight (lb.): 1 | Available quantity: 1

    $54 USD
    Euclid, OH
  • Trusted Seller
    GENERAL ELECTRIC 44A729182-038R02 INPUT MODULE

    GENERAL ELECTRIC 44A729182-038R02 INPUT MODULE ($199.99/EAACH OBO)

    • Manufacturer: GE

    “Very good conditions.” 44A729182038R02 DISCONTINUED BY MANUFACTURER I/O TERMINAL BLOCK 16 POINT W/CONNECTOR FOR IC693MDL645 Local deliveries available, simply message us before purchasing so we can properly adju...

    $200 USD
    Waukesha, WI
  • RELIANCE,57402-D,OUTPUT MODULE

    RELIANCE,57402-D,OUTPUT MODULE

    • Manufacturer: Reliance Electric

    Used in good condition. Part was pulled from operation upon factory shutdown and has been in storage since. Please see pictures for details and condition. You will receive what’s in the pictures. If we have multi...

    $60 USD
    Galion, OH
  • Trusted Seller
    Modicon Input Module - As-b855-016

    Modicon Input Module - As-b855-016

    • Manufacturer: Modicon

    Made In The Usa Name: Input Module | Arrival date: 10-08-2025 | Dimensions l x w x h (inches): 12 x 10 x 3 | Weight (lb.): 2 | Available quantity: 1

    $52 USD
    Euclid, OH
  • Trusted Seller
    Pilz Safety Relay Input Module

    Pilz Safety Relay Input Module - 772140

    • Manufacturer: Pilz

    New Factory Sealed Name: Safety Relay Input Module | Arrival date: 07-02-2025 | Dimensions l x w x h (inches): 7 x 7 x 5 | Weight (lb.): 6 | Available quantity: 1

    $73 USD
    Euclid, OH
  • Trusted Seller
    Honeywell PLC Output Module -

    Honeywell PLC Output Module - 621-6550rc

    • Manufacturer: Honeywell

    New Open Box Name: PLC Output Module | Arrival date: 08-25-2025 | Dimensions l x w x h (inches): 13 x 11 x 9 | Electrical: 2-5A, 24VDC | Weight (lb.): 2 | Available quantity: 2

    $130 USD
    Euclid, OH
  • Reliance Electric AutoMax 57C409 2-Channel

    Reliance Electric AutoMax 57C409 2-Channel PLC Analog Input Module

    • Manufacturer: Reliance Electric
    • Model: 57C409

    “Good Working Condition.” Reliance Electric AutoMax 57C409 2-Channel PLC Analog Input Module. Product Details Brand: Reliance Electric Channels: 2 Feature: Analog Type: PLC Input Module We endeavor to take clear ...

    $339 USD
    Greenville, SC
  • Trusted Seller
    Ge Output Module - Ic694mdl310b

    Ge Output Module - Ic694mdl310b

    • Manufacturer: GE

    New Open Box Name: Output Module | Arrival date: 10-20-2025 | Dimensions l x w x h (inches): 7 x 7 x 7 | Electrical: 0.5A, 120VAC | Weight (lb.): 1 | Available quantity: 1

    $200 USD
    Euclid, OH
  • Trusted Seller
    Allen Bradley Output Module -

    Allen Bradley Output Module - 1734-ob8s

    • Manufacturer: Allen-Bradley
    • Model: 1734

    Factory Sealed, Made In The Usa Name: Output Module | Arrival date: 10-13-2025 | Dimensions l x w x h (inches): 4 x 3 x 2 | Weight (lb.): 1 | Available quantity: 1

    $72 USD
    Euclid, OH
  • Trusted Seller
    B&r Digital Output Module -

    B&r Digital Output Module - X20s04110

    • Manufacturer: B & R

    New, No Box Name: Digital Output Module | Arrival date: 09-23-2025 | Dimensions l x w x h (inches): 7 x 7 x 5 | Weight (lb.): 1 | Available quantity: 1

    $342 USD
    Euclid, OH
45678

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.