Description
The ControlByWeb X-404™ is an exceptionally versatile Modbus master controller engineered for comprehensive industrial and automation monitoring. This powerful device can seamlessly monitor up to 32 Modbus RS-485 devices and sensors, establishing itself as a central hub for complex system oversight. Augmenting its Modbus capabilities, the X-404 includes a dedicated 1-Wire bus to accurately monitor up to 16 temperature and humidity sensors, providing a complete environmental sensing solution. With a user-friendly, web-based interface and robust features like no-code programmable logic (Task Builder) and peer-to-peer (P2P) communication, the X-404 simplifies the monitoring and control of critical equipment like generators, tanks, and environmental systems. For unmatched reliability, the optional X-404C model features a built-in LTE-M cellular radio with dual SIM for network failover and optimal wireless coverage.
Key Features
- Extensive Modbus Monitoring: Functions as a web-based Modbus master, monitoring up to 32 Modbus RS-485 devices for level, pressure, current, and more.
- Precision Temperature Sensing: Supports up to 16 1-Wire temperature sensors for accurate environmental control and tracking.
- Optional LTE-M Wireless (X-404C): Includes a built-in LTE-M cellular radio with dual SIM for superior coverage and network failover protection.
- No-Code Automation: Utilizes an intuitive Task Builder for creating custom, no-code programmable logic and control sequences.
- Advanced Data Management: Features conditional logging and Nonvolatile Flash storage (up to 50,688 logs) with scheduled email notifications and FTP log exports.
- Seamless Integration & Security: Supports multiple protocols (Modbus TCP/IP, XML, JSON, SNMP, HTTP GET) and ensures trusted operation with a secure design (no built-in OS or file system).
- P2P Networking: Facilitates Peer-to-Peer Communication to effortlessly share I/O and link remote devices among ControlByWeb controllers.
Specifications












Luc D. (verified owner) –
Easy to program, modbus work well with eurotherm controller and kohler ats/generator
Only one tights missing is the way to convert of a register to individual bits.
great product