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Profibus compatible infrared high temperature thermometer :

After finishing the environment control module project, I developed a Profibus compatible infrared thermometer for the ERA Technology (England). These thermometers are used in industrial blast furnace.

The hardest thing to do has been to work myself into Profibus and to implement the firmware and the PC software. In fact I have been the first in the company, who did set up a working Profibus system. The universal IX1, which is a special controller for fieldbus protocols, has been used for the profibus implementation. A PIC17C42A is controlling the device.

The analog part is done conventional. A 24 bit ADC from Analog Devices is employed for analog to digital conversion (AD7711). 

Among the Profibus, other industrial standards like 4-20mA loop and RS232 are implemented.

To ensure a save industrial use, the power supply is completely galvanic separated by the use of DC/DC converters.

Via several LEDs and buttons it is possible to control the state of the thermometer as stand alone device, like is has been specified by the customer. 

For further information please contact ERA-Technology, located in England.

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