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. Power your device with one of our cellular data plans and utilize expansion modules to bridge the I/O among all your connected ControlByWeb devices.

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Cellular relay switch - X-410CW, WebRelay Cellular, and WebRelay-Quad Cellulars

Cellular IoT Controllers

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

$469.99

The X-412™ is a powerful analog-to-digital Ethernet I/O PLC. It features 4 analog inputs, 4 relays, and a built-in web server for infinite control and monitoring possibilities.
  • 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.

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

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X-410 logic controller with cellular, wifi, and ethernet networking

X-410™ | Edge Programmable Controller

$399.99

Simplify any industrial application with the X-410™—no code necessary. Automation is easy with its browser-based interface and intuitive drop-down menus for creating event-based and scheduled logic. Monitor dry contacts and control relays with built-in I/O. Extend functionality by adding other ControlByWeb devices with P2P communication.
  • 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.

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

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WebRelay-Quad™ | 4 Web-Controlled Relays

$309.99

Remotely control 4 electromechanical relays with the WebRelay-Quad™. The simple user interface and no-code logic builder makes this programmable logic controller the easiest relay control method you can find.
  • 4 Relays
  • Ethernet, Cellular, or WiFi
  • 9-28VDC and/or POE
Note that the new models run the 400 Series firmware on the same great hardware, while the original WebRelay-Quad runs the previous firmware with no cloud access, a simpler browser interface, and no programmable logic or data logging.

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

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X-401™ | Dual Relay and Input Module

$369.99

The X-401™ has two SDPT relays (form C) and two optically isolated inputs. It also shares the same benefits as other 400 series devices, which includes a built-in web server and simple, no-code logic builder. Monitor locks and lights, reboot devices like IP cameras, control bells and alarms, and much more with the X-401.
  • 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.

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

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X-400C with Cell Icon

X-400™ | Modular I/O Controller

$399.99

The X-400™ is a web-enabled controller that allows for up to 32 added expansion modules and/or remote I/O devices. Expansion modules are connected directly to the X-400 via ribbon cable, or remotely with other CBW devices via P2P—allowing for monitoring and control of up to 64 I/O.

The X-400C offers wireless capability with a built-in cellular modem.
  • Expandable, Up to 64 I/O
  • Relays, Analog & Digital Inputs
  • Up to 16 temp sensors
  • Cellular version available

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

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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 the IT Department Happy

ControlByWeb cellular IoT controllers are ideal for applications where existing networks are unavailable or where network requirements are very stringent. IT managers are, understandably, concerned about their networks and especially about allowing new devices. The approval process can be long and difficult. For many, skipping the local network by installing cellular devices makes a lot of business sense. Get your data faster, keep networks separate and secure by choosing ControlByWeb cellular IoT modules.

Save Money On Fewer Devices

The embedded cellular gateway keeps costs low by limiting 3rd party devices needed to remotely monitor and/or control an asset or a process. They exist, and if you have them already, our standard Ethernet models work great with them. However, why buy another device when you don’t need to? Save money and make your installation as easy as possible.

Keep Data Flowing No Matter What

Wired networks are generally considered to be the most reliable but that doesn’t mean it never fails. ControlByWeb cellular IoT devices have the ability to 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.

Cellular-Enabled I/O for Remote Monitoring

Wide Carrier Coverage

eUICC 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.

Simple Install & Low Complexity

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.

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.

Simple Install & Low Complexity

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.

Why Cellular IoT?

Monitoring and control tasks vary wildly from one application to the next. Cellular networking on IoT logic controllers just makes sense. It adds the network flexibility you need to build solutions quickly and effectively. Here are a few reasons cellular edge control modules are a critical piece of the puzzle:

Remote Monitoring Made Easy

Our new cellular I/O modules make remote monitoring (and control) much easier. You get a drop-in solution that is ready to roll right away. The alternative is slower, more complex, and increasingly costly.

To do the same thing, you would need some kind of wireless networking infrastructure like point-to-point 900 MHz radios, routers, cable, etc. Then you have to install all that and get it operational. Certainly an option, but more costly and complex.

Save yourself and go with flexible, affordable cellular on ControlByWeb IoT devices.

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 are communicating with each other over the cloud.

Cellular Applications

ControlByWeb® Cellular I/O 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 the cellular data plan agreement.

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Let our Sales Engineers identify the right solution for your application

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.

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.
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400 Series Guided Demo

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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.