The B30A40 PWM servo drive is designed to drive brushless DC motors at a high switching frequency. A single red/green LED indicates operating status. The drive is fully protected against over-voltage, under voltage, over-current, over-heating and short- circuits across motor, ground and power leads.

Furthermore, the drive can interface with digital controllers or be used stand-alone, and requires only a single unregulated DC power supply. Loop gain, current limit, input gain and offset can be adjusted using 14 -turn potentiometers. The offset adjusting potentiometer can also be used as an on-board input signal for testing purposes.