How to Use Auto Clip Terminal Block (2 ways): Examples, Pinouts, and Specs

The Auto Clip Terminal Block (2 Ways), manufactured by DHARVIM (Part ID: CH-2), is a compact and reliable connector designed for quick and secure wire connections. It features a clip mechanism that allows for easy installation and removal without the need for specialized tools. This component is ideal for applications requiring frequent wiring changes or maintenance.

• Electrical wiring in industrial and residential systems
• Prototyping and testing circuits
• Connecting power supplies to devices
• LED lighting installations
• Automation systems and control panels

The following table outlines the key technical details of the DHARVIM CH-2 Auto Clip Terminal Block:

The CH-2 terminal block does not have traditional pins but instead features two wire slots for connection. The table below describes the slots:

Note: The polarity of the slots is not fixed, allowing for flexible wiring configurations.

1. Prepare the Wires:

   • Strip approximately 8-10mm of insulation from the ends of the wires you wish to connect.
   • Ensure the exposed wire is clean and free of frayed strands.

2. Insert the Wires:

   • Open the clip mechanism by pressing down on the lever.
   • Insert the stripped end of the wire into the corresponding slot.
   • Release the lever to secure the wire in place.

3. Verify the Connection:

   • Gently tug on the wire to ensure it is firmly held by the clip.
   • Repeat the process for the second wire.

4. Connect to the Circuit:

   • Place the terminal block in the desired location within your circuit.
   • Ensure proper insulation and spacing to avoid short circuits.

• Wire Compatibility: Use wires within the specified size range (0.5mm² to 2.5mm²).
• Current and Voltage Ratings: Do not exceed the rated current (10A) or voltage (250V AC).
• Secure Mounting: If used in a high-vibration environment, consider securing the terminal block to a panel or enclosure.
• Avoid Overheating: Ensure proper ventilation and avoid overloading the terminal block.

The CH-2 terminal block can be used to connect external components, such as an LED strip, to an Arduino UNO. Below is an example of wiring an LED strip to the Arduino using the terminal block:

• Connect the positive wire of the LED strip to one slot of the CH-2 terminal block.
• Connect the negative wire of the LED strip to the other slot.
• Use jumper wires to connect the terminal block to the Arduino's 5V and GND pins.

// Example code to control an LED strip connected via the CH-2 terminal block
const int ledPin = 9; // Pin connected to the LED strip

void setup() {
  pinMode(ledPin, OUTPUT); // Set the LED pin as an output
}

void loop() {
  digitalWrite(ledPin, HIGH); // Turn the LED strip on
  delay(1000); // Wait for 1 second
  digitalWrite(ledPin, LOW); // Turn the LED strip off
  delay(1000); // Wait for 1 second
}

Note: Ensure the LED strip's power requirements are within the Arduino's output capabilities.

1. Loose Connections:

   • Cause: Wire not fully inserted or clip not properly engaged.
   • Solution: Reinsert the wire and ensure the clip is securely closed.

2. Overheating:

   • Cause: Exceeding the rated current or poor ventilation.
   • Solution: Reduce the load or improve airflow around the terminal block.

3. Wire Slippage:

   • Cause: Using wires outside the specified size range.
   • Solution: Use wires within the 0.5mm² to 2.5mm² range.

4. Intermittent Connections:

   • Cause: Oxidation or dirt on the wire or contact surface.
   • Solution: Clean the wire ends and ensure proper contact.

Q: Can the CH-2 terminal block be reused?
A: Yes, the clip mechanism allows for repeated use without significant wear.

Q: Is the terminal block suitable for outdoor use?
A: The CH-2 is not waterproof. For outdoor applications, use it within a weatherproof enclosure.

Q: Can I connect wires of different sizes?
A: Yes, as long as both wires are within the specified size range (0.5mm² to 2.5mm²).

Q: Does the terminal block support DC connections?
A: Yes, the CH-2 can be used for both AC and DC connections within the rated voltage and current limits.