The CD-400 provides at its output, standard signal with value proportional to the number of active sensors, connected to their digital inputs. It has up to ten optically isolated digital inputs, in which can be connected to sensors with open collector output, dry contact, voltage level as STF-2500C and others. It provides power supply for sensors, simplifying application projects. Among the possible applications, there is the measurement and level control of various materials depending on the type of sensor used. Here some features: CD-400 is built armored box for assembly in the field, was developed using SMD technology, which allows the reduction of its size and features ten digital inputs 24V, an analog output and serial communication.