galvanic separation between the computer and the VELBUS system • velbus: •• full VELBUS 16.6kbps protocol compliant •• velbus short circuit protection to power and bus •• self restoration after bus error • USB: •• USB power indication •• USB V2.0 compatible (full speed 12Mb/s) •• uses standard Microsoft™ Windows™ 'usbser.sys' driver • RS232: •• full duplex RS232C communication with PC