Option "RS232 interface" for IT180/IT181 Part no.: 480002 RS232 signals made available on screw-type-connectors, eg. for connecting serial bus convertors USB interface is still available as a programming interface can be supplied ex works only Pricelist (German) Part no.: 480002 RS232 signals made available on screw-type-connectors, eg. for connecting serial bus convertors USB interface is still available as a programming interface can be supplied ex works only Pricelist (German)