BLSD-20Modbus - controller for DC brushless motors

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BLSD‑20Modbus - DC brushless motor controller with RS‑485 interface

BLSD‑20Modbus controllers are designed to control three-phase brushless DC motors with Hall sensors with rated current up to 20A. The controllers regulate the motor rotation speed, set the direction of rotation, control the acceleration and deceleration of the motor, provide positioning based on information from Hall sensors and have a position hold function. Thanks to the current limiting function, the controllers protect the motor from overloads.

The main parameters of controller BLSD‑20Modbus

  • Power supply - 24 ‑ 48 VDC
  • Rated current - 20 Amp
  • Max. current - 80 Amp
  • Regulation of peak power
  • Communication interface - RS‑485, Modbus – ASCII or RTU

BLSD-20Modbus features and capabilities

The controllers are controlled via the RS-485 interface using the Modbus RTU or ASCII protocol or by external signals supplied to the controller inputs. The block provides:

  • motor shaft rotation speed setting via Modbus or external analog signal;
  • setting the values ​​of acceleration and deceleration;
  • setting the maximum value of the motor current (motor overload protection);
  • drawing up a user control program, starting the program by command via Modbus or automatically when the drive is powered up;
  • programming inputs IN1 and IN2, which can also be used as START / STOP and REVERSE / DIRECTION signals;
  • selection of the logic of the input signals IN1 and IN2 (START / STOP and REVERS) - triggering on the edge or signal level;
  • positioning to a given coordinate or displacement by a given value according to the Hall sensors in the range from - 2 147 483 647 to + 2 147 483 647 Hall sensors switching.

Motor speed control:

  • External analog signal (0 .. + 5 V or potentiometer)
  • Modbus commands

BLSD-20Modbus control units programming

The most simple command system allows you to compose engine control algorithms in the form of a sequence of executable instructions. The controller allows you to create loops, wait timers, use conditional and unconditional, relative and absolute jumps, create and use subroutines. The maximum program length is 1024 instructions.

Dimensions of controller BLSD‑20:

dimensions of controller BLSD-20Modbus for DC brushless motors