Gefran's Geflex controller combines the functions of controllers and solid state relays, as well as the features of a PLC, into one unit for temperature control applications. A single bus cable (to the operator interface) replaces the wires of traditional instruments. The basic architecture calls for one master module and up to nine slave modules. Multiple master/slave groups can be installed. The range includes current ratings from 25 to 120A. Gefran SpA, Provaglio D'iseo, Italy +39 030 98881; www.gefran.it.