Features

• Advanced internal feedback circuit ensures excellent linearity, stable voltage performance, and strong resistance to high voltage, high current, and high temperatures.

• Fully isolated weak and strong current circuits provide enhanced safety and reliable control performance.

• Suitable for a wide range of automated control applications, including chemical processing, food machinery, packaging equipment, textile machinery, CNC machine tools, entertainment equipment, and other industrial automation systems.

Key Notes for Using SCR AC Regulator Modules

• Correct Polarity: All function terminals must remain positive relative to the COM terminal (negative). Reversed polarity may cause uncontrolled output. A higher control voltage results in a higher main-circuit output.

• Control Mode Switching: If both automatic (e.g., 4–20 mA) and manual (e.g., 0–5 V) controls are needed, use a double-throw switch to select the mode. When multiple control signals are input simultaneously, the stronger signal will dominate.

• Proper Main Circuit Wiring: Ensure the live (L) and neutral (N) wires are correctly connected. The grid voltage must not be lower than the minimum operating voltage required by the load.

• Load Limits:

  • Resistive loads ≤ 60% of rated current

  • Inductive or capacitive loads ≤ 40%

  • Motor loads ≤ 20%

• Overcurrent Protection: Overcurrent and short circuits are major causes of irreversible thyristor failure. Always use fast-acting fuses, air switches, or other protective devices.

• Adequate Heat Dissipation: Install a proper heat sink and enhance cooling in poor ventilation. Never operate the module directly with any short-circuit load.