Portable data acquisition device based on Motorola 68HC908GP32 microcontroller

The contribution deals with design of portable data acquisition device based on 8-bit microcontroller Motorola 68HC908GP32 which can be used in number of control and monitoring tasks. Hardware design is adopted to fulfill high reliability and immunity against industrial environment, high precision and compact dimensions. Communication with supervision system is performed via standard RS232 interface utilizing universal ASCII-based communication protocol which is supported by number of software environments like Matlab and Control Web for instance. Designed device was tested on real heating plant system with four temperature measurement channels andone digital channel for heating element control connected with standard personal computer running Matlab6.5 software.