Introduction
The ELPRO 905U series is designed as a cost-effective wireless solution for transmitting transducer and control signals, suitable for integration with systems like PLC, DCS, or SCADA.

Specifications
The modules are encased in durable aluminum and include microcontrollers, I/O circuits, radio transceivers, and serial ports. They support various signal types and offer RS485 serial ports for I/O expansion.

Communication and Networking
Featuring two-way communication, the modules use a reliable protocol with error-checking and auto re-transmissions. They support peer-to-peer networking, allowing communication without a network master.

Security and Reliability
Data encryption and frequency encoding ensure security against data theft. The system uses exception-reporting messaging and self-checking updates for communication integrity.

I/O Configurations
Various I/O configurations are available, including discrete, analog, and pulse/counter inputs/outputs, adaptable for specific applications.

Applications
Suitable for process plants, factories, agriculture, mining, and security, the modules operate in the 900MHz band with a range of 20 miles in the USA/Canada and 20 km in Australia/NZ.

Power Supply
The modules feature a switch-mode power supply with battery backup and solar regulator options, providing alarms for power issues and remote monitoring capabilities.

Configuration and Diagnostics
Configuration is done via a Windows-based program with password protection. Diagnostic features include radio signal measurement and testing.

Conclusion
The ELPRO 905U series offers a secure, reliable, and cost-effective wireless solution for industrial automation and process control, reducing the need for extensive cabling.