Wiesemann & Theis GmbH W&T 38211, Interface USB/RS232/RS422/RS485 38211

W&T 38211, Interface USB/RS232/RS422/RS48 5 Industry 1kV isolation with overvoltage protection Product properties: Bi-directional conversion of USB into RS232, RS422 or RS485 interface USB 2.0 Full Speed Device (12 Mbit/s) Power supply via USB Compatible with RS485 2-wire and 4-wire bus systems Automatic bus access control Galvanic isolation min. 1kV DC Integrated overvoltage protection for the serial port Common solution for the Windows, Linux and Mac world Careful circuit design and generous component dimensioning ensure more than 25 years of service life Conforms to standards both in office and industrial environments: Increased noise immunity for industrial areas Stricter noise emission for residential and commercial areas Overvoltage protection for serial interfaces The permissible voltages allowed to have an effect on serial ports in case of an error are limited to rather low values according to the data sheet specifications for the interface components. Voltages which exceed these values even for a short time will inevitably result in damage to or even destruction of the integrated circuits. To prevent such effects, the USB Interface 38211 includes integrated overvoltage protection which limits the maximum occurring signal voltage in a variety of applications to harmless values by using Transil diodes.