How to Use Emergency Stop Push Button: Examples, Pinouts, and Specs

The Emergency Stop Push Button (Manufacturer: EAO, Part ID: 61-3440.4/1) is a critical safety device designed to immediately halt machinery or equipment during emergencies. It ensures quick access and response to prevent accidents, protecting both personnel and equipment. This push button is commonly used in industrial machinery, automation systems, and other environments where safety is paramount.

• Industrial machinery and manufacturing lines
• Automation systems and robotic equipment
• Elevators and escalators
• Conveyor systems
• Laboratory and testing equipment
• Any system requiring immediate shutdown in emergencies

The following table outlines the key technical details of the EAO Emergency Stop Push Button (61-3440.4/1):

The Emergency Stop Push Button typically has the following pin configuration:

1. Mounting the Push Button:

   • Drill a 22.5 mm hole in the panel or enclosure where the button will be installed.
   • Secure the push button in place using the provided mounting hardware.

2. Wiring the Contacts:

   • Connect the COM terminal to the power source or control circuit.
   • Use the NC terminal for circuits that need to break (open) when the button is pressed.
   • Use the NO terminal for circuits that need to close when the button is pressed.
   • Ensure proper insulation and secure connections to avoid short circuits.

3. Testing the Button:

   • After wiring, test the button by pressing it to ensure the machinery or equipment halts immediately.
   • Verify that the button resets properly when pulled back to its original position.

• Safety Compliance: Ensure the installation complies with relevant safety standards (e.g., IEC 60947-5-1, EN ISO 13850).
• Accessibility: Install the button in a location that is easily accessible during emergencies.
• Regular Maintenance: Periodically inspect the button for wear and tear, and test its functionality.
• Avoid Overloading: Do not exceed the rated voltage (24V DC / 230V AC) or current (10A) to prevent damage.
• Use in Harsh Environments: The IP65 rating ensures protection against dust and water, but avoid submerging the button or exposing it to extreme conditions.

The Emergency Stop Push Button can be used with an Arduino UNO to trigger an emergency shutdown in a project. Below is an example circuit and code:

• Connect the COM terminal to the Arduino's GND pin.
• Connect the NC terminal to a digital input pin (e.g., D2) on the Arduino.
• Use a pull-up resistor (10kΩ) between the digital input pin and 5V to ensure a stable signal.

// Emergency Stop Push Button Example
// This code monitors the button state and halts the system when pressed.

const int buttonPin = 2;  // Pin connected to the NC terminal of the button
const int ledPin = 13;    // Pin connected to an LED for indication

void setup() {
  pinMode(buttonPin, INPUT_PULLUP); // Set button pin as input with pull-up resistor
  pinMode(ledPin, OUTPUT);         // Set LED pin as output
  digitalWrite(ledPin, HIGH);      // Turn on LED (system running)
}

void loop() {
  int buttonState = digitalRead(buttonPin); // Read the button state

  if (buttonState == LOW) { // Button pressed (NC contact opens)
    digitalWrite(ledPin, LOW); // Turn off LED (system halted)
    while (true) {
      // Stay in this loop until the system is manually reset
    }
  }
}

1. Can this button be used outdoors?

   • Yes, the IP65 rating makes it suitable for outdoor use, but avoid prolonged exposure to extreme weather.

2. What happens if the button is pressed accidentally?

   • The machinery or equipment will halt immediately. Ensure proper training for personnel to avoid accidental presses.

3. Can I use this button with AC circuits?

   • Yes, the button supports up to 230V AC. Ensure proper wiring and insulation.

4. How do I reset the button after pressing it?

   • Pull the actuator back to its original position to reset the button.

By following this documentation, users can safely and effectively integrate the EAO Emergency Stop Push Button (61-3440.4/1) into their systems.