Based on this product's specifications, here are some alternatives and similar models
RS485 Modbus communication card Unit U-Modbus-Card for serial connection and protocol integration
Summary description:
Unit U-Modbus-Card is an RS485 Modbus communication card designed to provide serial Modbus connectivity for compatible devices and controllers. The card enables protocol integration over RS485 for data exchange, monitoring and control in automation systems. It is suitable for connecting equipment that supports Modbus RTU, facilitating system interoperability and simplifying installation and wiring.