Signal Conversion Control Board

The working principle of the signal conversion control board mainly involves signal collection, processing and output control. The specific principles are as follows:

1. Signal collection and processing:

Raw signals, such as physical quantities such as temperature and pressure, are collected through sensors or input modules (such as digital quantity I/O modules). These modules convert non-standard signals (such as resistors, capacitors, voltages, currents) into standard signals (such as 4-20mA, 0-10V).

2. Signal conversion:

Analog or digital circuits are used to convert non-electrical signals (such as pressure, temperature) into electrical signals. For example, a piezoelectric sensor converts pressure changes into a current or voltage signal, which is then converted into a digital signal through an analog-to-digital converter (ADC) for computer processing.

3. Control logic:

Signal processing and control logic are implemented through a microprocessor or PLC (such as the S7-1200 series). For example, the traffic signal controller generates a timing plan through a microprocessor and controls the light phase output unit to switch traffic light colors.

4. Modular design:

Most control boards adopt a modular structure. For example, the S7-1200 series supports digital/analog input/output modules, allowing flexible expansion of functions. Modules communicate through standard interfaces (such as RS485) for easy maintenance and upgrades.