Description The JUMO Dtron 300 plast series of controllers consists of three freely programmable instruments in different DIN formats for controlling temperature and other process variables, to suit the special applications of plastics industry. Such applications include extruders, injection-molding machinery, tempering equipment and hot-channel systems. The high-contrast, multicolor, multicolor LC display for process value, setpoint and operater prompting contains two four-digit 7-segment displays, two single-character 16-segment displays, display of the active setpoints, six status indicators, and displays for the unit, ramp function and manual operation. Simple operation through 4 keys. The instruments can be used as 2-state, 3-state, modulating or continuous controllers. The controllers software includes a hot-channel warm-up ramp function, control loop and output level montoring, two autotuning(self-optimization) procedures, a math and logic module, as well as 4 limit comparators. Linearizations for the usual transducers are stored, and a customer-specific linearization table can be programmed. A setup program is avilable for user-friendly configuration from a PC. An RS422/485, a PROFIBUS-DP or current interface can be used to integrate the instrunments into a data network. The electrical connection is made at the back, via screw terminals. The possibile input and output configurations are shown in the following block diagram. The option boards are universally applicable for all instruments in the series. Key features Control loop monitoring Output level monitoring Hot-channel warm-up ramp Heater current monitoring Modbus master function Boost function Four programmable setpoints, two parameter sets Math and logic module Two autotuning procedures Fast, user-friendly configuration through the setup program with program editor RS422/485 interface PROFIBUS-DP interface Current interface 0/20mA(as per Euromap)