PLC (Programmable Logic Controller)
A Programmable Logic Controller (PLC) is a digital electronic device with a microprocessor, used for automation control as a digital logic controller. It consists of modules such as the CPU module, digital I/O modules, analog I/O modules, power supply modules, and expansion modules. PLCs can receive (input) and send (output) various types of electrical or electronic signals and use them to control or supervise almost all kinds of mechanical and electrical systems.
RTD/TC Temperature Acquisition Module
Temperature acquisition modules for distributed I/O are used for industrial field instruments, typically employing thermocouples and RTDs (Resistance Temperature Detectors) as temperature sensors. Thermocouples offer an extremely wide temperature measurement range (e.g., up to 2300°C) and fast response time, while RTDs provide higher measurement accuracy and stability. The SHC62xx and SHC61xx series, with their high-precision, highly integrated architecture, can support thermocouple temperature measurement along with cold-junction compensation methods like RTD or NTC using a single chip. They can also be used independently for any type of RTD (2-wire, 3-wire, or 4-wire).
Analog Input (AI) Module
Analog Input Modules are products used for acquiring analog signals (e.g., 0-10V, 4-20mA) from industrial field instruments. They are widely applied in collecting information from field instruments measuring pressure, flow, level, temperature, concentration, valve position, etc. Combined with AO modules, DI modules, DO modules, and ProfiNet network modules, they form distributed slave stations, enabling signal acquisition and control output for instruments, meters, and equipment within industrial automation systems.
Smart Transmitter
A Smart Transmitter integrates a sensor, signal conditioning and conversion circuits, and a microprocessor. The integrated signal conditioning and conversion circuits can excite the sensor and perform precision acquisition, while the internal microprocessor enables correction and compensation of the sensor signal and converts the output into a standard signal acceptable to controllers or measurement instruments. Smart transmitters often also support digital communication, allowing the transmission of control signals alongside measurement.
Variable Frequency Drives and Servo Controllers
A Variable Frequency Drive (VFD) is a power control device that operates by changing the frequency of the motor's power supply to control AC motors.
A Servo Drive, also known as a "servo controller" or "servo amplifier," is a controller used to operate servo motors.
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