The icusb232is industrial usb to serial adapter lets you add an optically 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 optical isolation circuit and 15kv esd protection to protect costly and often sensitive control equipment against electrical damage an extended operating temperature range 30degc to 75degc also helps to ensure performa