Unlike smart devices, the ZQ-B20 requires manual trimming. The manual details how to adjust the Min Speed , Max Speed , and Torque Boost using a small screwdriver on onboard potentiometers (often labeled VR1, VR2).
The B20 series often uses tiny red DIP switches to set the motor's operating frequency (50Hz vs 60Hz) or the input signal type (0-10V vs 4-20mA). The manual contains the "truth table" for these switches. Without it, the unit defaults to a factory setting that may not match your motor. zq-b20 manual
By: Technical Standards Desk
This is why people search for the PDF. The ZQ-B20 usually features a terminal block (L, N, PE, A+, A-, COM). The manual provides the logic for connecting external potentiometers (speed dials) and emergency stop relays. Wiring it blind often results in blowing the internal fuse—or worse, frying the IGBT module. Unlike smart devices, the ZQ-B20 requires manual trimming