DC Motor Controller 12V/24V with Reverse – Forward/Reverse Control, Manual or Automatic

Technical Specifications

• Operating Voltage: DC 4–40V (recommended 6–36V)
• Module Consumption: approx. 0.6W without motor, 0.1W in standby
• Maximum Output Current: up to 20A
• Lifetime: >150,000 actuations
• Recommended Motor Power: up to ~80W
• Signal Input Type: active-low (active when voltage < 2V)
• Response Speed: K1/K2 ≈ 20ms, SW1/SW2 ≈ 50ms
• Operating Modes: PO (self-hold) / P1 (jog)

PO and P1 Operating Modes

• PO (Standard / Self-Hold): A short pulse on K1 or K2 starts the motor, which runs automatically until it reaches a limit switch or receives the opposite command.
• P1 (Jog): The motor runs only while the command is active. Ideal for fine adjustments.

Inputs and Limit Switches

• K1: forward command (active-low)
• K2: reverse command (active-low)
• SW1: forward limit switch (NO recommended)
• SW2: reverse limit switch (NO recommended)
• VIN+ / VIN-: module power supply (DC 4–40V)
• Motor+ / Motor-: output to motor

Active-low inputs allow the use of simple buttons, mechanical limit switches, or NPN-NO sensors (3-wire).

Limit Switch Functionality and Automatic Motion

SW1 and SW2 act as safety stops: when activated, the motor stops instantly. You can create automatic motion between two points without an internal timer:

• Point A → connected to K1
• Point B → connected to K2
• SW1 and SW2 not connected
• NO switches at positions A and B

The motor will continuously move A → B → A → B in a repeating cycle.

Timer / Time Relay Option

The controller can be combined with a timer to precisely set how long the motor moves forward and backward. This enables fully automated cycles without manual intervention. Simple timers (IN+/IN–, O+/O–) or models with VCC, S1, S2 can be used.

Arduino Compatibility – Advanced Control and Automation

The module works perfectly with Arduino because K1 and K2 inputs are active-low, meaning they activate when connected to GND. Arduino can control motor direction using just two digital pins, while the controller handles all current switching.

Connecting Arduino to the Controller

• Arduino GND → Controller GND (mandatory)
• Arduino Digital Pin → K1 (forward)
• Arduino Digital Pin → K2 (reverse)
• SW1/SW2 limit switches can be used directly on the controller or read by Arduino.

What You Can Do with Arduino

• Set exact forward duration
• Set exact reverse duration
• Define pauses between cycles
• Set number of cycles
• Stop at limit switches
• Acceleration, deceleration, ramp control
• Read sensors (current, position, obstacle, end-of-travel)

Arduino becomes the “brain” of the automation, while the controller manages power switching to the motor. This combination is ideal for advanced projects and fully programmable systems.

Performance and Recommendations

• At 12V – maximum current 20A
• At 24V – effective current ~10A
• Check motor startup current
• Use appropriate cables and connectors
• Fuse recommended for protection

Package Contents

• 1 × Motor Direction Controller (Forward / Reverse)