Industrial
Control Panels and Instruments
Instruction Manuals of Process Control Instruments
and
Industrial Automation Solutions, Control Panel Diagrams, Wiring, and
Facia.
Temperature and Pressure Controllers form a
large part of Process
control Instrumentation. Then you have Flow, Humidity and many more
custom parameters.
All Real Life Physical Phenomena are reduced to Analog Numbers by
Sensors and Transducers. This analog value is amplified and
linearized and brought into standardized windows like 1-5 Volts or
4-20mA
and more.
These Analog Values go to Analog Closed Loop Controllers or Meters for
Measurement and Control. In Embedded Controllers, the Analog is
converted to Digital ( At least 12 bit, 8 bits are cheap not used for
industrial automation, more than 16 bits is not required as sensor
accuracy/linearity never transgress such precision )
Embedded Process Controllers may use Microcontrollers with Floating
Point Arithmetic, Lookup Table, Logic and Basic Math. Advanced
Controllers may use DSP and Complex Algorithms for Adaptive control.
(self learn, fuzzy logic.).
Here are some Controllers i used to Make and Sell long ago. Not anymore.
Here is a instruction sheet for a 3 wire transmitter. It
Amplifies the uV signals from a K type Thermocouple,
Chromel-Alumel. The output is a strong 4-20mA which is fit
for looping and driving a Controller an Alarm and an Analog
Recorder too.
24 V DC Three Wire
Thermocouple Transmitter 4-20 mA
8 Bits D/A may be used when a control signal is needed, like 4-20
mA Control Output driving a Thyristor PWM bank. Here 8 Bit is
enough when the thyristor bank drives large heaters. The thermal
inertia and delay makes very precise control nearly impossible.
When a parameter needs to be controlled in a tiny area, precision
control is possible. A 16 Bit
control signal is required. The thermal design here is more important
than the controller, the have to be tandem.
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