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
