No-Code PLCs for Edge and IIoT Applications
Capture and use data at the edge with no-code, programmable logic controllers that feature embedded logic, data logging, and cloud compatibility. A built-in web server and intuitive drop-down interface simplify setup and support email notifications, advanced security settings, P2P communication, and multiple protocols. On-board logic is programmed using drop-down menus through “if this, then that” style conditions—no code required.
ControlByWeb® PLC Devices
Modular PLCs
X-600M™ 
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X-600M™ | Web-Enabled I/O Controller
$549.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe X-600M™ is ControlByWeb’s most advanced controller, built for large-scale industrial and OEM applications. Supporting up to 64 expansion modules and 1,024 I/O points, it’s engineered for high-density, complex systems.
With an embedded logic builder, LUA scripting for advanced control, and support for multiple customizable dashboards, the X-600M™ gives engineers powerful tools for automation and visualization. Open protocol support (Modbus, SNMP, peer-to-peer) ensures seamless integration with SCADA and PLC systems, delivered without licensing fees or proprietary lock-in.- Expandable, Up to 1,024 I/O
- Relays, Analog/Digital/Thermocouple Inputs
- Up to 32 Temperature Sensors
- GUI Dashboard
[frequentlyBought ids="7635,7621,7318,7289"]
X-400™ & X-400C™ 
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X-400™ | Modular I/O Controller
Price range: $299.99 through $399.99VIEW PRODUCTView Product This product has options that may be chosen on the product pageTThe 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"]
Popular Expansion Modules for the X-600M™ & X-400™
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X-12S™ | 8 Relay Expansion Module
$179.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe X-12S™ adds eight Form-A (SPST) relays to an X-400™ or X-600M™ controller, providing reliable low-current switching for industrial and OEM applications. Each relay is rated at 2.5A, with commons grouped in two banks for simplified wiring.
A removable terminal connector streamlines installation, while the ribbon cable connection supplies both power and communication from the host controller. Multiple X-12S™ modules can be added for scalable relay expansion in larger systems.8 Relays
Expansion Module for the X-400 or X-600M
[frequentlyBought ids="7635"]
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X-17S™ | 4 Relay, 4 Input Expansion Module
$179.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe X-17S™ adds four Form-A (SPST) relays and four optically-isolated digital inputs to an X-400™ or X-600M™ controller, making it a versatile expansion option for both control and monitoring. Relays are designed for moderate load switching, while optical isolation ensures electrical separation between field equipment and low-voltage control circuits—improving safety and reducing interference.
Multiple X-17S™ modules can be connected via ribbon cable for power and communication, enabling scalable expansion. Typical applications include equipment control, alarm panel monitoring, pump or fan management, and facility automation.4 Relays
4 Digital Inputs
Expansion Module for the X-400 and X-600M
[frequentlyBought ids="7635,7798,34091"]
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X-18S™ | 10 High-Current Relay Expansion Module
$309.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe X-18S™ adds ten high-current relays to an X-400™ or X-600M™ controller, each rated at 15A with Form-C (SPDT) contacts for maximum flexibility in switching. Connections are made directly to the relays through rugged ¼″ tab terminals, ensuring reliable performance in demanding environments.
Designed for industrial and OEM applications, the X-18S™ is ideal for controlling motors, pumps, fans, lighting, and other high-load equipment. Multiple modules can be connected to the host controller via ribbon cable for both power and communication, enabling scalable expansion for large systems.10 High Current Relays
Expansion Module for the X-400 and X-600M
[frequentlyBought ids="7635,7696"]
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X-22S™ | 8 Analog Input Expansion Module
$349.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe X-22S™ adds eight high-resolution analog inputs to an X-400™ or X-600M™ controller, supporting multiple voltage ranges as well as 4–20mA current-loop sensors. This flexibility makes it ideal for integrating a wide range of industrial and process instrumentation.
Engineered for accuracy and reliability, the X-22S™ is well-suited for applications such as tank or bin level monitoring, flow and pressure measurement, and energy or environmental data acquisition. Multiple X-22S™ modules can be connected via ribbon cable to expand analog input capacity as needed.8 Analog Inputs
Expansion Module for the X-400™ or X-600M™
[frequentlyBought ids="7635,7916, 22960"]
Standalone PLCs
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X-410™ | Edge Programmable Controller
Price range: $299.99 through $399.99VIEW PRODUCTView Product This product has options that may be chosen on the product pageThe 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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X-401™ | Dual Relay and Input Module
Price range: $269.99 through $369.99VIEW PRODUCTView Product This product has options that may be chosen on the product pageThe 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™ | 4‐Channel Relay & Analog Input Module
Price range: $369.99 through $469.99VIEW PRODUCTView Product This product has options that may be chosen on the product pageThe 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-432™ | Advanced I/O Controller
$629.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe X-432™ is a standalone, Ethernet-based controller with 38 onboard I/O points, designed for demanding industrial and OEM applications. Its browser-based interface and embedded GUI logic builder allow engineers to configure complex event-driven automation, scheduling, and monitoring tasks—without external software or recurring licensing fees.
Supporting open protocols including Modbus, MQTT, SNMP, and REST, the X-432™ integrates seamlessly into SCADA and PLC systems. With both local and remote control capabilities, it delivers scalable performance for applications requiring reliable, high-density I/O at the edge.- 16 Relays
- 18 Digital Inputs
- 4 Analog Inputs
- Up to 16 Temperature Sensors
[frequentlyBought ids="7621,34491,7540,7798"]
The Perfect Edge PLC
The Industrial Internet of Things (IIoT) has made monitoring and control at the edge possible and cost-effective. But remote access is not the only criteria for the right edge or micro PLC. Here are the features needed to make the perfect programmable logic controller for the Edge.
On-Board Logic
Logic is stored on the device to improve reliability regardless of network connectivity.
Remote Notifications
Edge applications are often in remote places. Even when they’re not, notifying key personnel of important conditions is critical. Our PLCs include email notifications so important updates are made in near real time.
Easy Integration
Multiple protocols are necessary to be compatible with various control systems. We support MQTT, Modbus TCP/IP, HTTP, JSON, XML, and SNMP.
Optional Cloud Compatibility
Cloud services can improve data access and enhances system integration. Our devices are compatible with the ControlByWeb Cloud and third-party services.
Flexible Application
ControlByWeb PLCs are built for flexibility. Most PLCs can be used in various applications, but we add flexibility in two important ways: ease of use and cost to own. This makes our PLCs a better fit for more applications—especially where speed and cost of programming, cost to deploy and maintain, and technical fit all need to be carefully considered.
Integration Ready
A big part of the genesis of our brand, ControlByWeb, was the ability to integrate with other systems efficiently. We looked forward then, just as we do now. Our devices use a variety of industrial and IT protocols including MQTT, Modbus TCP/IP, and SNMP. We also communicate using the very flexible and ubiquitous Hypertext Transfer Protocol, or HTTP. ControlByWeb PLCs include an embedded web server, so software developers can very easily poll our devices, set relay states, change register values, and more through a simple Get request.
How To Program Our No-Code PLC
Programming a PLC is typically a specialized task requiring a skilled engineer who isn’t always available. Even so-called “easy-to-use” PLCs on the market require Ladder Logic, Function Block, or some kind of diagram building with complex code, scripts, and a mountain of settings. On top of all that, most PLC user interfaces are overloaded with options, menus, sub-menus, wizards, modals, etc.
Our no-code PLCs use a very simple user interface with an uncomplicated, single menu system on the left-hand side. Most users will simply start at the top section and fill in the fields as they move down.
Programming logic is one of the simplest tasks for our users. Choose between scheduled or conditional tasks and use drop-down menus to select prebuilt options. These options are very straightforward, including turning relays on and off, sending email alerts, or logging a change under specific conditions.
Learn more about programming ControlByWeb PLCs.
Application Spotlight: Agriculture
Perishable produce is just that: food that is easily spoiled if exposed to conditions outside of a specific range. Too much light, a fluctuation in temperature, or exposure to bacteria can make produce unfit to make it to market. That’s why it’s so important to maintain the just-right environment as fruits and vegetables go from harvest to the grocery store. And no device is better at monitoring all these variables than a PLC.
PLCs play a key role in agricultural temperature and humidity control. They’re often connected to finely tuned equipment to monitor and control temperature, humidity, airflow, and CO2. They’re doing what PLCs do best—monitoring sensor data and using that data to control connected fans, lighting, HVAC units, and motorized doors and vents.
This ControlByWeb case study highlights Control System Designer Thad Failor, who built an all-in-one control panel that, in part, uses a ControlByWeb PLC. Our hardware allows the control panel to monitor crop storage ventilation equipment. Thad said that “the whole system together gives the storage manager the tools they need to be able to successfully store the product at the optimal conditions.”
