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3.4.4 Example of Process PID Control
The following is an example of a Process PID Control used in a ventilation system:
In a ventilation system, the temperature is to be settable from - 5 - 35°C with
a potentiometer of 0-10 Volt. The set temperature must be kept constant, for
which purpose the Process Control is to be used.
The control is of the inverse type, which means that when the temperature
increases, the ventilation speed is increased as well, so as to generate more
air. When the temperature drops, the speed is reduced. The transmitter used
is a temperature sensor with a working range of -10-40°C, 4-20 mA. Min. /
Max. speed 300 / 1500 RPM.
NB!
The example shows a two-wire transmitter.
1.
Start/Stop via switch connected to terminal 18.
2.
Temperature reference via potentiometer (-5-35°C, 0-10 VDC) connected to terminal 53.
3.
Temperature feedback via transmitter (-10-40°C, 4-20 mA) connected to terminal 54. Switch S202 set to ON (current input).
AF-650 GP Design Guide
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Summary of Contents for AF-650 GP Series
Page 5: ...AF 650 GP Design Guide 4 1...
Page 53: ...AF 650 GP Design Guide 52 4...
Page 97: ...Please note airflow directions 6 1 5 Mechanical Dimensions AF 650 GP Design Guide 96 6...
Page 98: ...Please note airflow directions AF 650 GP Design Guide 97 6...
Page 99: ...Please note airflow directions AF 650 GP Design Guide 98 6...
Page 100: ...Please note airflow directions AF 650 GP Design Guide 99 6...
Page 173: ...Max cable length 150 m AF 650 GP Design Guide 172 9...
Page 179: ...AF 650 GP Design Guide 178 9...