Add a galvanically isolated rs232 serial port with esd protection through a usb port din rail mountable the icusb232is industrial usb to serial adapter lets you add a galvanically isolated rs232 serial port with esd protection through a usb port and offers a durable din rail mountable design ideal for industrial environments the usb serial adapter features an integrated 5kv galvanic isolation circuit and 15kv esd protection to protect costly and often sensitive control equipment against