How to Use Controllino Mini: Examples, Pinouts, and Specs

The Controllino Mini is a compact, Arduino-based programmable logic controller (PLC) designed for automation and control applications. Manufactured by Controllino, this versatile device combines the flexibility of Arduino programming with the robustness of industrial-grade hardware. It features a range of digital and analog inputs/outputs, making it ideal for projects in home automation, industrial control, robotics, and more.

• Home automation systems (e.g., lighting, HVAC control)
• Industrial machinery control
• Robotics and mechatronics
• IoT (Internet of Things) applications
• Educational and prototyping projects

1. Power Supply: Connect a 12-24V DC power supply to the Controllino Mini's power input terminals.
2. Digital Inputs: Connect sensors or switches to the digital input pins (DI1-DI6). Ensure the input voltage is within the 12-24V DC range.
3. Digital Outputs: Use the relay outputs (DO1-DO6) to control external devices such as lights, motors, or solenoids. Ensure the load does not exceed 230V AC / 6A per relay.
4. Analog Inputs: Connect analog sensors (e.g., temperature or pressure sensors) to the analog input pins (AI1-AI4). The input voltage should be within the 0-10V DC range.
5. Programming: Use the Arduino IDE to write and upload code to the Controllino Mini via the USB interface. Select "Arduino Uno" as the board type in the IDE.

• Isolation: The digital inputs are opto-isolated for safety. Ensure proper grounding to avoid noise interference.
• Relay Ratings: Do not exceed the maximum voltage and current ratings of the relays to prevent damage.
• Analog Input Range: Ensure that the analog input voltage does not exceed 10V DC to avoid damaging the microcontroller.
• Programming: Always double-check your code for errors before uploading to prevent unintended behavior.
• Environment: Operate the Controllino Mini in a dry, dust-free environment within the specified temperature range.

Below is an example code snippet to toggle a relay output (DO1) based on a digital input (DI1):

// Define pin numbers for digital input and output
const int digitalInputPin = 2;  // DI1 is connected to pin 2
const int relayOutputPin = 3;   // DO1 is connected to pin 3

void setup() {
  pinMode(digitalInputPin, INPUT);  // Set DI1 as input
  pinMode(relayOutputPin, OUTPUT); // Set DO1 as output
  digitalWrite(relayOutputPin, LOW); // Ensure relay is off initially
}

void loop() {
  int inputState = digitalRead(digitalInputPin); // Read the state of DI1

  if (inputState == HIGH) {
    digitalWrite(relayOutputPin, HIGH); // Turn on the relay if DI1 is HIGH
  } else {
    digitalWrite(relayOutputPin, LOW);  // Turn off the relay if DI1 is LOW
  }
}

1. Problem: The Controllino Mini does not power on.

   • Solution: Verify that the power supply is connected properly and provides 12-24V DC. Check for loose connections.

2. Problem: Digital inputs are not responding.

   • Solution: Ensure the input voltage is within the 12-24V DC range. Check the wiring and grounding.

3. Problem: Relays are not switching.

   • Solution: Verify that the relay output is not overloaded. Check the code logic and ensure the correct pins are used.

4. Problem: Analog inputs are giving incorrect readings.

   • Solution: Ensure the input voltage is within the 0-10V DC range. Use a multimeter to verify the sensor output.

5. Problem: Unable to upload code via Arduino IDE.

   • Solution: Ensure the correct board type ("Arduino Uno") and COM port are selected in the IDE. Check the USB connection.

• Q: Can the Controllino Mini be used with other Arduino libraries?

  • A: Yes, the Controllino Mini is fully compatible with most Arduino libraries.

• Q: Is the Controllino Mini suitable for industrial environments?

  • A: Yes, it is designed for industrial use and complies with CE and UL certifications.

• Q: Can I use the Controllino Mini for IoT applications?

  • A: Yes, you can integrate it with IoT platforms using communication interfaces like UART, I2C, or SPI.

• Q: What is the maximum current the relays can handle?

  • A: Each relay can handle up to 6A at 230V AC.

• Q: Does the Controllino Mini support PWM outputs?

  • A: Yes, PWM functionality is available on specific pins, as it is based on the ATmega328P microcontroller.