Our new cellular monitoring and control modules make your life easier. When you need to deploy an IoT controller where no wired networking infrastructure exists, skip the third-party program hardware and build from our popular X-400 platform - now with embedded cellular connectivity. Remote monitoring and control has never been easier.

Cellular Controllers

ControlByWeb® cellular-enabled edge controllers expand your I/O capabilities with an embedded cellular modem. Connect your device using one of our cellular data plans and utilize expansion modules to bridge the I/O gap.

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Cellular IoT Controllers

  • Single X-410 with Cell, WiFi, and POE icons

    X-410™ | Edge Programmable Controller

     Price range: $299.99 through $399.99
    The X-410™ is a versatile industrial I/O controller with four relays, four digital inputs, and one temperature input, designed for reliable edge control. Its built-in web server allows for efficient deployment and its embedded GUI logic builder enable event-driven or scheduled automation without external software or licensing fees.

    Through peer-to-peer communication, the X-410™ can seamlessly expand with other ControlByWeb® devices, making it an efficient choice for system integrators and OEMs who need scalable, protocol-ready control in demanding environments.
    • 4 Relays & 4 Digital Inputs
    • Up to 16 Temperature Sensors
    • Ethernet, Cellular, or WiFi
    • 9-28VDC and/or POE
    Cellular and WiFi are Now Available. Note that X-410CW and X-410W models include cellular and WiFi capability respectively, which allows for more flexibility for your application.

    Global Cellular Coverage. Discuss international cellular options with a sales engineer.

    [frequentlyBought ids="7624,34491,7540,7798"]

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  • WebRelay single relay and input module with Ethernet, cellular, or WiFi connectivity

    WebRelay™ | Single Relay & Input Module

     Price range: $189.99 through $289.99
    The latest WebRelay™ is engineered for industrial reliability and flexible deployment. With updated firmware and optional Wi-Fi or cellular connectivity, it delivers robust remote relay control at the edge of your system.

    A streamlined browser-based interface and open REST API provide seamless integration with PLCs, SCADA platforms, and IIoT applications—without licensing fees or vendor lock-in. Whether deployed as a stand-alone controller or part of a larger automation network, WebRelay™ offers dependable performance in commercial, industrial, and OEM environments. Note: This is the updated WebRelay. See the original WebRelay here.
    • 1 Relay & 1 Digital Input
    • Ethernet, Cellular, or WiFi
    • 9-28VDC and/or POE
    Cellular and WiFi are Now Available. Note that X-WR-441CW and X-WR-441W models include cellular and WiFi capability respectively, which allows for more flexibility for your application.

    Global Cellular Coverage. Discuss international cellular options with a sales engineer.

    [frequentlyBought ids="7624,7621,7798,34091"]

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  • WebRelay-Quad device with 4 web-controlled relays for remote control with Celluar, Ethernet and, WiFi connectivity

    WebRelay-Quad™ | 4 Web-Controlled Relays

     Price range: $209.99 through $309.99
    The WebRelay-Quad streamlines relay control with powerful yet accessible options, including a conditional and scheduled logic builder with intuitive drop-down menus, seamless open API integration via your own software, or communication using industrial protocols like MQTT and Modbus TCP/IP. Note: This is the new WebRelay-Quad. See the original WebRelay-Quad here.
    • 4 Relays
    • Ethernet, Cellular, or WiFi
    • 9-28VDC and/or POE
    Cellular and WiFi are Now Available. Note that X-WR-444CW and X-WR-444W models include cellular and WiFi capability respectively, which allows for more flexibility for your application.

    Global Cellular Coverage. Discuss international cellular options with a sales engineer.

    [frequentlyBought ids="7624,7621,7793"]

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  • X-401 with Cell, WiFi, and POE icons

    X-401™ | Dual Relay and Input Module

     Price range: $269.99 through $369.99
    The X-401™ combines two SPDT (Form C) relays with two optically isolated inputs in a compact, industrial-grade module. As part of the 400 Series, it features a browser-based interface, embedded GUI logic builder, and open protocols (Modbus, MQTT, SNMP, REST) for seamless integration with SCADA, PLC, and IIoT systems.

    Ideal for applications such as process monitoring, equipment reboot, and alarm control, the X-401™ provides a reliable edge-control solution that eliminates licensing fees and reduces integration complexity.
    • 2 Relays & 2 Digital Inputs
    • Ethernet, Cellular, or WiFi
    • 9-28VDC and/or POE
    Cellular and WiFi are Now Available. Note that X-401CW and X-401W models include cellular and WiFi capability respectively, which allows for more flexibility for your application.

    Global Cellular Coverage. Discuss international cellular options with a sales engineer.

    [frequentlyBought ids="7624,7621,7798,34091"]

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  • X-412 with Cell, WiFi, and POE icons

    X-412™ | 4‐Channel Relay & Analog Input Module

     Price range: $369.99 through $469.99
    The X-412™ is an Ethernet-based I/O controller with four high-resolution analog inputs and four relays, engineered for precise monitoring in industrial and OEM applications. Its browser-based interface and embedded GUI logic builder enable event-driven automation, scheduling, and data acquisition—without external software or licensing fees.

    Functions as a stand-alone monitoring device with support for open protocols (Modbus, MQTT, SNMP, REST), the X-412™ integrates seamlessly into SCADA and PLC systems, providing a reliable and scalable solution for process monitoring, equipment control, and facility automation.
    • 4 Relays
    • 4 Analog Inputs
    New Cellular Option: The X-412CW model includes a cellular modem, compatible with our cellular data plans.
    WiFi is Now Available. The X-412CW model includes WiFi capability which allows for more flexibility and cost savings for your application.

    Global Cellular Coverage. Discuss international cellular options with a sales engineer.

    [frequentlyBought ids="7624,7916,34491,7781"]

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  • X-400™ | Modular I/O Controller

    X-400™ | Modular I/O Controller

     Price range: $299.99 through $399.99
    TThe X-400™ is a scalable Ethernet-based controller that supports up to 32 local expansion modules or remote ControlByWeb® devices through peer-to-peer communication, enabling systems with up to 64 I/O points. Its browser-based interface and embedded GUI logic builder provide event-driven automation for powerful turn-key solutions and seamless integration with SCADA and PLC platforms—without licensing fees.

    X-400C™ – Cellular-Enabled Model
    The X-400C™ adds a built-in cellular modem, extending the same modular control and integration capabilities to remote or distributed applications.
    • Expandable, Up to 64 I/O
    • Relays, Analog & Digital Inputs
    • Up to 16 temp sensors
    • Cellular version available
    Global Cellular Coverage. Discuss international cellular options with a sales engineer.

    [frequentlyBought ids="7635,34491,7624,7577"]

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  • X404CW with Cell and WiFi Icons

    X-404™ | Modbus RS-485 Module

     Price range: $399.99 through $499.99
    The X-404™ is a purpose-built industrial controller for Modbus networks, supporting up to 32 RS-485 devices or sensors. It also includes a 1-Wire Bus for temperature and humidity monitoring, making it a versatile option for process, facility, and OEM applications.

    With its browser-based interface and embedded GUI logic builder, the X-404™ streamlines configuration and control while eliminating licensing fees and vendor lock-in.

    X-404C™ – Cellular-Enabled Model
    The X-404C™ adds a built-in cellular modem, extending Modbus master and sensor monitoring capabilities to remote or distributed environments.
    • Modbus RS-485 input
    • Up to 16 temperature sensors
    • Cellular version available
    Global Cellular Coverage. Discuss international cellular options with a sales engineer.

    [frequentlyBought ids="7624,7927,34491,7793"]

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  • FridgeAlert temperature monitoring device with 3.5" touchscreen display, supporting multiple sensors and connectivity options

    FridgeAlert | Temperature Monitoring With Touch Screen

     Price range: $599.99 through $699.99
    The FridgeAlert™ is purpose-built to monitor fridge and freezer systems. It offers smart monitoring to avoid false alarms and battery backup to continue logging temperature data while alerting of any power outages. FridgeAlert is easy to set up and features a large touchscreen display for at-a-glance information.

    The FA100C model offers wireless capability with a built-in cellular modem.
    • 3.5″ Touchscreen Display
    • Up to 10 Temperature Sensors
    • 1 Digital Input
    • Cellular version available
    Global Cellular Coverage. Discuss international cellular options with a sales engineer.

    [frequentlyBought ids="7540,7558,7573,7624"]

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Need Help Choosing the Right Product?

Let our Sales Engineers identify the right solution for your application.

Benefits of Cellular I/O Controllers

Simplify Installation

Our devices come out of the box with powerful features like our no-code browser-based UI, peer-to-peer device communications, and a configurable control page. These features simplify implementation and give technicians the confidence that their systems will work correctly.

Keep IT Happy

ControlByWeb cellular IoT controllers are ideal when existing networks are unavailable or where network requirements are stringent. IT managers are rightly concerned about security and the devices they allow, making the approval process difficult. For many, skipping the local network by installing cellular devices makes a lot of business sense. Get your data faster and keep networks separate and secure.

Save Money on Fewer Devices

An embedded cellular gateway keeps costs low by limiting third-party devices needed to remotely monitor and/or control an asset or a process. Our controllers work great with other hardware, but why buy another device when you don’t need to? Save money and make your installation as easy as possible.

Ensure a Consistent Connection

Wired networks are generally considered to be the most reliable but that doesn’t mean they never fail. ControlByWeb cellular IoT devices can use use cellular networking as the primary or as a failover network if ethernet goes out, ensuring that your data keeps flowing, regardless of your wired network conditions.

Why Cellular IoT?

Monitoring and control tasks vary widely from one application to the next. Cellular networking on IoT logic controllers adds the network flexibility you need to build solutions quickly and effectively.

Streamlined Remote Monitoring

There are a virtually unlimited number of ways to capture and use edge data. Some methods are (much) easier than others. We design controllers that are powerful yet simple to set up and use thanks to the intuitive no-code Task Builder and browser-based UI. Our new cellular I/O modules go a step further with an embedded SIM for a true drop-in solution that’s ready to go in minutes.

That same capability using a non-cellular controller would require a wireless networking infrastructure like point-to-point 900 MHz radios, routes, cables and other hardwiring, etc. Then there’s the need for installation and setup of multiple third-party pieces of hardware. This is certainly viable but does increase cost and complexity.

Integrate your solutions faster and with less headaches by choosing ControlByWeb cellular IoT devices.

CBW Cloud Devices Level Monitoring Application Diagram

In this example, two X-412CW modules are being used to monitor tank level one two water tanks. One X-412CW is controlling a pump to manage the level between the two tanks. Both X-412CW modules communicate with each other over the cloud.

Cellular Applications

ControlByWeb® Cellular PLC Features

  • Embedded cellular connectivity
  • eSIM technology for optimized cell coverage
  • Email/text alerts
  • Control relays based on preset thresholds
  • Custom logic—no programming required
  • Built-in web server
  • Configurable control and status web page
  • Modbus/TCP support
  • XML formatted status
  • Password protected
  • Rugged, DIN rail, or wall mount enclosure
  • Power supply options: 9-28 VDC
  • Configurable control and status web page
  • Modbus/TCP support
  • XML formatted status
  • Password protected
  • Rugged, DIN rail, or wall mount enclosure
  • Power supply options: 9-28 VDC

See Terms and Conditions to learn more about cellular data plan agreement.

Cellular I/O Devices at a Glance

  • The WebRelay Cellular comes with an electromechanical relay featuring a built-in web server and optically isolated input that can be used to monitor dry contacts or control industrial equipment remotely.
  • The WebRelay-Quad Cellular gives you the ability to control up to 4 electromechanical relays remotely. The simple user interface and no-code logic builder makes this programmable logic controller the easiest relay control method you can find.
  • The X-410CW comes with 4 digital inputs, 4 relays, and up to 16 temperature sensors, allowing you to monitor and control digital inputs and relays in even the most remote locations. Control lights, doors, sensors, and more with its built-in I/O.
  • The X-412CW includes 4 analog-to-digital inputs and 4 relays. This device is ideal for monitoring analog sensors in locations where wired infrastructure would be difficult or impossible to implement, such as water/wastewater applications, agriculture applications, and oil and gas applications.
  • The X-401CW has two SDPT relays (form C) and two optically isolated inputs. It is perfect for remotely monitoring and controlling locks, lights, bells, alarms, and much more.
  • The X-400C is ideal for creating remote monitoring and control systems that require cellular connectivity and/or cloud access. With its expandable design, it’s used in industries far and wide for stand-alone controls, as a capable RTU, or as a sophisticated edge programmable controller. It’s the ideal industrial IoT device.
  • The X-404C is perfect for monitoring Modbus RS-485 signals from sensors deployed in the field. This controller is very commonly used for remote tank level monitoring where the multidrop wiring configuration and compatibility with hazloc level sensors is a critical advantage.
  • The FridgeAlert is purpose-built for commercial refrigeration monitoring. Whether it’s a cooler, freezer, or any temperature controlled area, you can monitoring up to 10 temperature sensors with a convenient touch screen display. The cellular version simplifies networking and enables monitoring in difficult locations.

Cellular-Enabled I/O for Remote Monitoring

Wide Carrier Coverage

eUICC (eSIM) technology allows ControlByWeb cellular devices to operate across multiple carriers. This allows us to optimize cellular coverage based on your location.

No WiFi Necessary

Cellular simplifies your installation and fits where no wired infrastructure exists. There’s no need for third-party resources or IT intervention—everything you need from a PLC is included with your ControlByWeb device.

Primary or Backup

With ControlByWeb cellular PLCs, you have the option to use Ethernet as the primary connection to the network and cellular as a failover. This allows logging, remote access, and email alerts even if Ethernet fails.

Power Your Whole Setup

ControlByWeb cellular PLCs include Peer-to-Peer Communication that allows for shared I/O among ControlByWeb devices. It only requires one cellular-enabled PLC to enable all connected I/O to operate wirelessly.

Built-In Connectivity

ControlByWeb cellular devices include an omnidirectional antenna for use with the embedded LTE-M cellular radio. The antenna is FCC compliant and will not cause interference when installed correctly.

Configurable Status Page

Every 400-series ControlByWeb I/O device is powered by a lightweight, built-in user interface. Cellular devices have additional settings within the UI where users can review their signal strength, see registration status, set cellular mode and ping interval, and more.

Cloud Compatible

The ControlByWeb Cloud simplifies monitoring, control, and data logging. It provides access to your controller but keeps logic on the device so you are not dependent on network connectivity. Get the best of both worlds with our reliable platform. A cloud subscription is included with your cellular data plan at no additional cost.

Combined coverage map of cell phone coverage for ControlByWeb cellular devices.
Combined network coverage map for ControlByWeb cellular devices. Updated July 2023.
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400 Series Guided Demo

Self-Guided, Live Demo of our Products

SETUP PAGES

Use the Setup Page to set up I/O, change settings, and create logic with intuitive dropdown menus.

CONTROL PAGE

Use the Control Page to see I/O status and manually control relays.

*Setup page login information: Username: admin Password: webrelay

Schedule A Guided Walkthrough

Want a little extra guidance? Schedule a 15-minute guided demo with our sales engineers. They’ll show you how it works for your application.