HART module in DL2/DL7 data logger

DL2 and DL7 data logger are extend with new IN1HRT module, which enable communication with devices equipped with HART protocole. DL2 data logger allowes to read up to 30 measurement, DL7 up to 100 measurement. Transducers can be connect via multidrop mode (maximum 15 devices connect to one module).