The Listec RDU 316 Remote Display Unit is reassuring for Rome metro tunnel operations. Messages generated in the LIST sensor control unit can be displayed at up to 1,000 m distance with the RDU 316 via RS 485. The RDU is fail-safe, and is saving up to 450 messages chronologically in date and time. In the event of an alarm, the sensor and section will be shown on the alphanumerical remote display. The status is displayed in selected languages and in coded colours red, orange, and green. Visit http://www.listec-gmbh.com/.  21/12.