The RS232 interface card features a DB9 connector, providing reliable and standardized serial communication with essential signals, including RXD, TXD, CTS, and RTS, for smooth data exchange and control. Designed for flexibility, this card also includes an addON expansion module connector, allowing users to enhance and customize their setup by integrating additional modules or peripherals. This combination makes the RS232 card an ideal choice for developers and engineers who require robust serial communication alongside expandable functionality, facilitating seamless integration into diverse IoT and industrial environments. Dedicated aluminum cover provide robust protection when the card is installed in FX30/FX30S gateways.