Digital Inputs
ControlByWeb devices with digital inputs are used to monitor the state of sensors, switches, or other binary equipment. These provide real-time visibility into system status, alerts, and events. Whether you’re tracking door openings, machine fault states, or button presses, digital inputs offer a reliable, flexible way to monitor external conditions remotely. Click here to learn more about digital inputs on ControlByWeb devices.
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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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WebRelay™ | Single Relay & Input Module
Price range: $189.99 through $289.99VIEW PRODUCTView Product This product has options that may be chosen on the product pageThe 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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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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Original WebRelay™ | Single Relay & Input Module
Price range: $169.99 through $199.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe original WebRelay™ offers exactly what its name suggests, a web-controlled relay with a simple browser-based GUI. It is an electromechanical relay featuring a built-in web server and optically isolated input that can be used to monitor dry contacts or control industrial and commercial equipment. 1 Relay
1 Digital Input
Note: This is the original WebRelay. See the new WebRelay with the latest 400 series firmware.[frequentlyBought ids="7624,7621,7798,34091"]
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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"]
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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"]
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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"]
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X-408™ | Digital Input Module
Price range: $219.99 through $249.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe X-408™ is an eight-channel input controller with optically isolated digital inputs, purpose-built for reliable dry contact monitoring in industrial and commercial environments.
It can operate as a stand-alone device using its embedded GUI logic builder and browser-based interface, or integrate seamlessly with SCADA, PLC, and IIoT systems via open protocols. Whether deployed for alarms, equipment status, or facility monitoring, the X-408™ delivers dependable digital input management without licensing fees or vendor lock-in.8 Digital Inputs
Discrete On/Off
Counters
Frequency
[frequentlyBought ids="7624,7798,7876,34091"]
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X-420™ | Instrumentation-Grade Data Acquisition
Price range: $369.99 through $399.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe X-420™ is a versatile industrial controller with software-programmable digital I/O that can be configured as either inputs or outputs, giving engineers flexibility to adapt the module to a wide range of applications.
It can operate as a stand-alone device with its embedded GUI logic builder and browser-based dashboards, or integrate seamlessly with SCADA, PLC, and IIoT systems using open protocols. Ideal for process monitoring, facility automation, or OEM equipment, the X-420™ delivers adaptable control without licensing fees or vendor lock-in.4 Analog Inputs
2 Digital I/O
Up to 16 Temperature Sensors
[frequentlyBought ids="7621,34491,7916,7781"]
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WebRelay-10 Plus™ | Industrial Grade Remote Relay Control
$549.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe WebRelay-10 Plus™ delivers reliable remote control with ten individually controlled 15A electromechanical relays, engineered for industrial and commercial applications. With a built-in web server, open API, and seamless integration into SCADA, PLC, and IIoT environments, it enables secure control and monitoring without licensing fees or proprietary software.
Its rugged design and straightforward configuration make the WebRelay-10 Plus™ a dependable choice for system integrators, OEMs, and facility engineers needing scalable relay control at the edge.- 10 Relays (Independent Form-C SPDT)
- 2 Digital Inputs
- Up to 16 Temperature Sensors
- 1/4″ Tab Connectors
[frequentlyBought ids="7624,7621,7793,34491"]
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WebSwitch Plus™ | Remote Power Switch
Price range: $319.99 through $329.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe WebSwitch Plus™ provides IP-based control of two independent AC outlets, designed for managing critical devices in industrial, commercial, and OEM environments. With worldwide compatibility (100–240V AC, 50/60Hz) and a secure browser-based interface, it offers reliable remote power cycling, reboot, and monitoring—without licensing fees or proprietary software.
Engineered for seamless integration into automation networks, the WebSwitch Plus™ helps system integrators and engineers reduce downtime, simplify maintenance, and extend control to edge devices.- 2 Relay-Controlled Power Outlets (10A)
- 2 Digital Inputs
- Up to 16 Temperature Sensors
[frequentlyBought ids="7795,7587,7558,34491"]
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X-15S™ | 8 Digital Input Expansion Module
$179.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe X-15S™ adds eight optically isolated digital inputs to an X-400™ or X-600M™ controller, providing reliable status monitoring while maintaining electrical separation between field equipment and low-voltage control circuits. This isolation improves safety and reduces the risk of ground loop interference in industrial environments.
Multiple X-15S™ modules can be connected to the host controller via ribbon cable for power and communication, enabling scalable expansion for large systems. Typical applications include alarm panel integration, equipment status monitoring, safety interlocks, and facility automation.8 Digital Inputs
Expansion Module for the X-400 or X-600M
[frequentlyBought ids="7635,7798,34091"]
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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-19S™ | Multi-Purpose I/O Expansion Module
$389.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe X-19S™ is a versatile expansion module for the X-400™ and X-600M™ controllers, combining 16 relays, 16 optically isolated digital inputs, and 4 analog inputs in a single unit. Screw terminal strips provide secure, industrial-grade connections for all I/O points.
As a high-density module, the X-19S™ is ideal for applications that require large-scale control and monitoring in a compact footprint, such as building automation, process control, and OEM equipment. Multiple X-19S™ units or other expansion modules can be connected via ribbon cable to scale I/O capacity as needed.16 Relays
16 Digital Inputs
4 Analog Inputs
Expansion Module for the X-400 and X-600M
[frequentlyBought ids="7635,7696,34091,7916"]
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X-20S™ | 6 Relay, 6 Digital Input Expansion Module
$309.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe X-20S™ adds six high-current relays and six optically isolated digital inputs to an X-400™ or X-600M™ controller. Each relay is rated for heavy-duty switching with Form-C (SPDT) contacts, while the isolated inputs provide reliable status monitoring with electrical separation from control circuits.
Connections are made through rugged screw terminal strips, ensuring secure wiring in industrial environments. Multiple X-20S™ modules or other expansions can be added via ribbon cable for scalable system growth. Typical applications include pump and fan control, equipment monitoring, and facility automation.6 Relays
6 Digital Inputs
Expansion Module for the X-400 and X-600M
[frequentlyBought ids="7635,7798,34091,7876"]
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FridgeAlert | Temperature Monitoring With Touch Screen
Price range: $599.99 through $699.99VIEW PRODUCTView Product This product has options that may be chosen on the product pageThe 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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WebRelay Wireless™ | Single Relay & Input Module
$219.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe WebRelay Wireless™ combines an electromechanical relay and optically-isolated digital input with secure Wi-Fi connectivity, eliminating the need for additional hardware or middleware. Its on-device web server and open API make configuration and integration straightforward, whether you’re extending SCADA systems, deploying remote monitoring, or embedding control into OEM equipment.
Designed for industrial and commercial environments, WebRelay Wireless™ provides a compact, reliable solution for edge control—without licensing fees or vendor lock-in.- 1 Relay (12A 277VAC, 30 VDC)
- 1 Digital Input (4-26 VDC)
- Up to 4 Temperature Sensors (-67°F to 257°F / -55°C to +125°C)
[frequentlyBought ids="7624,7540,7798"]
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XW-111™ | Wireless Digital Input Monitor
Price range: $189.99 through $209.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe XW-111™ is an easy-to-use, wireless digital input monitoring device with a built-in web server. It can sense the state of up to two switch-state closure sensors. - 2 Digital Inputs
- WiFi-Enabled (802.11 b/g/n)
[frequentlyBought ids="7626,7798,31995"]
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XW-112™ | WiFi Water Detector
$189.99VIEW PRODUCTView Product This product has multiple variants. The options may be chosen on the product pageThe XW-112™ is a standalone water leak detector that monitors the presence of liquids, sends alarm notifications, and provides real-time sensor status via the web. Includes one GRI-2605 liquid detection sensor. - 1 Water Contact Sensor (included)
- WiFi-Enabled (802.11 b/g/n)
Digital I/O Modules
Use Digital Input modules to remotely monitor digital input state or control relays based on input state. ControlByWeb digital input modules are high quality, easily programmable and work peer to peer or with cloud connection.
Data Acquisition & Remote Monitoring
ControlByWeb provides a streamlined and reliable way to affordably monitor and control remote assets and/or processes. Our Ethernet I/O products combine traditional automation hardware with the flexibility of IP networking.
Each device has a built-in web server and can be accessed via a standard web browser over a LAN, WAN, or via the Internet. There is no special software or app required, no drivers to install, and no monthly subscriptions.
Peer-to-Peer Communication
With our Peer-to-Peer communication and remote control capabilities, our Ethernet I/O devices are ideal for remote relay control. You can control a relay remotely based on an input on a ControlByWeb device (peer-to-peer) or you can remotely turn on pumps, open gates, or lock buildings via the built-in web server on each device.
Features
- 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 and/or POE