DC BRUSHLESS MOTOR CONTROLLER BLD-20 Manual BLD.20.001 1. Product designation Brushless controllers BLD-20 are electronic devices designed to operate and control brushless synchronous 3-phase dc motors with Hall encoder. Motor operation parameters are set via controller’s inputs. 2. Technical characteristic Controllers are designed to control speed, direction, smooth start and stop of brushless motors by input signals “START/STOP”, “REVERSE”, analog “SPEED”, “ACCEL” and “RESET”. Table 1 Controller Power supply voltage, VDC Maximum continuous current, A Short-time maximum overload, A Acceleration/Deceleration time, s Environmental Conditions: Ambient Temperature: -25…+50°C Humidity: 90% RH or less upon condition +25°C Condensation and freezing: none Pressure: 650…800 mm of mercury 3. Construction and control elements BLD-20 is designed as circuit plate with electronics elements, installed on a plate and covered with a metal case. Besides electronic components, there are indicating and control elements, connection terminals and connectors on the board: • • • • terminal screws for power supply, brushless motor windings and encoder lines, and control circuit connection; Buttons “START/STOP”, “REVERSE” and “RESET”; Internal preset potentiometers to adjust speed “SPEED”, acceleration and deceleration “ACCEL”; LED for indication of the controller status. Control by inputs: To adjust motor speed internal potentiometer “SPEED” and analog input “(0..5)V” are provided. To adjust acceleration and deceleration internal potentiometers “ACCEL” is provided. For sudden stop or for controller reset button “RESET” is intended. To change the direction button and input “REVERSE” are intended. To stat or stop motion button and input “START/STOP” is intended. With standard firmware “START/STOP” and “REVERSE” signals use pulse logic and activate as per the front edge of the signal. Firmware with level signal logic is available as per a request. 4. Assembly and connection. Please, learn this manual carefully before connection and assembly. Please, wire just when power is off. Do not attempt to change wiring while the power is ON. Please, provide a reliable contact in connection terminals. During wiring, please, observe the polarity and wire management. 4.1. Power supply and motor connection

Connect brushless motor to the controller according to the scheme (image 2). Motor phases should be connected to the contacts 3 – 5 “PHa”, “PHb”, “PHc”. Hall encoder lines should be connected to the contacts 7 – 9 “HA”, “HB”, “HC”. GND of Hall encoder connects to the contact 6 “GND”, supply voltage for Hall encoder connects to the contact 10 “+5V”. Connect power supply to the contacts 1 and 2 “GND” (“-“) and “+Vp” (“+”) according to the specification of the power supply unit. Input voltage range 24-48VDC is allowed. Connection wires should be suitable for the motor current. 4.2. External control...