The LK-MD1202 is a driver board that controls the direction and speed of two brushed DC motors. Two control methods are available: (1) RS485 communication using the Pelco-D protocol, and (2) local push-buttons for motor direction with a potentiometer for speed. It uses H-bridge PWM speed control, giving smooth acceleration on start-up and braked stops. Limit-switch inputs stop each motor automatically when a limit is reached. The power input and motor outputs are protected against overcurrent, and the control and communication ports have ESD protection. Operating voltage is DC 9-24 V.