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Digital transmission of dataAs soon as complex systems have to be regulated and conrolled, it makes sense to centrally evaluate and process further the measured data with the help of a bus system and a control centre. (For example systems with many measuring points, or with measuring points lying wide apart, like in buildings or underground parking garages.) For this, the measured values have to be feeded digitally into the bus system.
Traditionally however, gas measuring systems determining the concentration of gases and vapors in the surrounding atmosphere usually output their measured value as an analog signal (4-20 mA). Although a link to the digital data communication is possible, it is has been expensive and time-consuming so far. | |  | | | Therefore, J. Dittrich Elektronic developed and manufactures now a simple and reasonable modbus gateway, which transforms the analog 4-20 mA measured values of the company's gas measuring systems into digital ones and serially transmits them via an RS485 interface to a control centre, which can be up to 1000 m apart.
For this, the gateway uses the proven modbus RTU protocol, a common, clearly structured, stable and reliable protocol. J. Dittrich Elektronic choosed modbus among many other field bus systems, as the implementation and the following maintenance of this stable communication system is relatively easy and inexpensive. As modbus is the most widely used, a large number of appropriate control centres is available on the market. If required, you can also obtain a compatible PLC from us.
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