Cost reduction is the principle that SNNA always adheres to. Each SQ actuator is internally integrated with an all-in-one frequency converter. This innovative concept is far superior to the traditional actuator solution of motor + reduction gear, which simplifies the mechanical structure and cuts down manufacturing and application costs.

The basic control functions of the SQ control unit include motor power supply control, overload sensor control, solid-state reversing starter with mechanical/electrical self-locking function, and a monitoring control board that monitors all signals to ensure normal operation of the actuator.

The proportional control unit precisely modulates valve opening proportionally according to analog signals. The valve position feedback unit converts the actual valve opening accurately into analog signals for feedback output.

All internal and external signals of the actuator can indicate normal status or faults via LED indicator lights.

Variable Frequency & Intelligent Design, Absolute Safety

Main power supply monitoring

Single-phase / phase loss protection

Phase sequence misconnection protection

Motor overheating protection

Power / torque overload protection

Open/close fault relay

Variable Frequency Intelligent Motor Control Unit

Complete motor protection functions

Automatic correction of power supply phase sequence

No need for an external motor control cabinet

Optimize the control process by regulating motor speed

Wide adjustable range for closing torque and output shaft speed→ Simplifies model selection in the initial design phase

Valve Protection Functions

Soft start & soft close

Output torque never exceeds the preset upper limit

Proportional Control Board

Input Signal:4-20mADC, 0-5VDC, 0-10VDC, 1-5VDC, 1-10VDC

Input Impedance: 250Ω

Potentiometer Signal: 500Ω - 10kΩ

Excitation Signal: 2.3VDC

Dead Zone Adjustment: 0.1-4.5% adjustable (0.3% step, 15 steps in total)

Inhibit Time Adjustment: 0-7.5s (0.5s step, 15 steps in total)

Control Accuracy: 1%

Valve Position Transmitter

Input: 110/220VAC±10%Output: 4-20mA / 1-10VDC

Full Scale Adjustment: ±30%Zero Point Adjustment: ±20%

Monitoring Board

Overload and overheating protection

Fault & phase sequence error detection

Phase loss or power failure monitoring