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APEM A01ES-D Series Twist Release Emergency Stop Push Button, Panel Mount, 16mm Cutout, 2NC, IP40, IP65


An emergency stop button, also known as an E-Stop or emergency stop switch, is a critical safety device designed to quickly halt machinery or equipment in hazardous situations. These fail-safe control switches protect both operators and machinery by providing readily accessible means to interrupt operations in emergencies or when the workflow demands it.

All machinery requires an emergency stop button to reduce the risk of injury or damage. These buttons are typically red, often with a yellow background for high visibility and easy identification, ensuring a swift response in critical situations.

## **Types of Emergency Stop Buttons**

Emergency stop [push buttons](https://my.rs-online.com/web/content/discovery/ideas-and-advice/push-button-switches-guide) come in various actuation types to suit different applications and operational needs:

- **Push-Pull:** These buttons are pushed in to activate the emergency stop and released by pulling the button back out.
- **Twist Release:** The button is pushed in to stop the machinery and released by twisting it to its original position.
- **Key Release:** These buttons require a key to reset after activation, preventing unauthorised restarts and ensuring deliberate safety checks before resuming operation.

In addition to these common types, specialised emergency stop switches cater to specific requirements:

- **Foot and Palm Buttons:** Featuring large actuator surfaces, these buttons can be operated by foot or hand, enabling quick response in emergency situations. They are often tamper-proof and ideal for harsh environments.
- **Position Switches:** These switches are linked to the emergency stop actuating element, providing a highly reliable and easy-to-install solution. They are suitable for a wide range of applications.

## **Where Are Emergency Stop Buttons Used?**

Emergency stop push buttons can be found in any industry, including industrial, commercial and public facilities. They are required to be clearly visible to anyone who is required to use them. It is also possible to have several emergency stop buttons on one machine depending on what part of the machine has to be stopped.

## **How to Choose Emergency Stop Push Buttons**

Selecting the right emergency stop push button involves considering several factors to ensure optimal safety and functionality:

### **Ergonomics of Design**

The design of the emergency stop button should prioritise ease of use and accessibility. Consider factors like the size and shape of the button, the force required for activation, and the tactile feedback provided to the operator. A well-designed emergency stop button should be comfortable to use and easy to locate and activate in an emergency, even when wearing gloves or under stress.

### **Actuation Type**

Emergency stop buttons are available in various actuation types, each with its own advantages and suitability for specific applications. Consider the following:

- **Push-Pull:** The most common type, offering a simple and intuitive operation.
- **Twist Release:** Provides a secure hold and prevents accidental resets.
- **Key Release:** Ensures controlled access and prevents unauthorised restarts.
- **Foot or Palm Actuation:** Suitable for applications where hands may be occupied or for quick response in emergencies.

### **Visibility**

Emergency stop buttons must be clearly visible and easily identifiable, even from a distance. This often involves using bright colours, such as red or yellow, and contrasting backgrounds. Consider the lighting conditions and potential obstructions in the environment when choosing the location and design of your emergency stop buttons.

### **Environmental Considerations**

The environment in which the emergency stop button will be used plays a crucial role in selecting the appropriate type and construction. Consider factors like:

- **Temperature:** Choose a button that can withstand the temperature range of your operating environment.
- **Moisture and Dust:** Select a button with an appropriate IP rating to protect against ingress of moisture, dust, or other contaminants.
- **Chemical Resistance:** If the button is exposed to chemicals or other harsh substances, ensure it is made from materials that can resist corrosion or degradation.

### **Durability**

Emergency stop buttons must be robust and durable to withstand frequent use and potential impacts. Choose a button constructed from high-quality materials that can resist wear and tear, ensuring reliable operation over time.

### **Installation Requirements**

Consider the installation requirements of the emergency stop button, including the mounting method, wiring connections, and any necessary accessories or enclosures. Ensure the button is installed correctly and in compliance with relevant safety standards.

### **Compliance with Standards**

Emergency stop buttons must comply with relevant safety standards, such as IEC 60947-5-1 and ISO 13850. These standards specify requirements for design, performance, and labelling of emergency stop devices to ensure their effectiveness in preventing accidents and injuries.

## **Industrial Application of Emergency Stop Buttons**

Emergency stop buttons are critical safety devices found in a wide range of industrial settings, safeguarding personnel and equipment in potentially hazardous situations. Their applications span across various industries, ensuring swift and effective responses to emergencies.

### **Manufacturing & Production Lines**

Emergency stop buttons are indispensable on manufacturing and production lines, where machinery and equipment operate in close proximity to workers. They provide a readily accessible means to halt operations in case of accidents, malfunctions, or safety breaches, preventing injuries and minimising damage.

### **Transportation Systems**

In the transportation industry, emergency stop buttons are crucial for ensuring passenger and operator safety. They are found in trains, buses, trams, and other public transport systems, allowing for quick shutdown in emergency situations.

### **Automation Industry**

Emergency stop buttons are integral to automated systems, enabling operators to quickly stop robots, conveyors, and other automated equipment in case of malfunctions or unexpected events. This prevents damage to equipment and ensures the safety of personnel working in close proximity.

### **Food & Beverage Processing Plants**

In the food and beverage industry, emergency stop buttons are essential for maintaining hygiene and safety standards. They allow for quick shutdown of production lines in case of contamination, equipment failure, or other emergencies, preventing the spread of contaminants and ensuring product safety.

### **Chemical Factories**

Emergency stop buttons are crucial in chemical factories where hazardous materials are handled. They enable rapid shutdown of processes or equipment in case of leaks, spills, or other safety breaches, minimising the risk of exposure and environmental damage.

### **Machine Tools**

Machine tools, such as lathes, milling machines, and drills, can pose significant risks to operators. Emergency stop buttons provide a quick and accessible way to [stop these machines](https://my.rs-online.com/web/content/discovery/ideas-and-advice/machine-safety-guide) in case of accidents or malfunctions, preventing injuries and minimising damage to the equipment.

## **Delivery Information**

RS offers fast delivery of emergency stop buttons and other crucial safety components like [safety relays](https://my.rs-online.com/web/c/relays-signal-conditioning/relays/safety-relays/) and [contact lights](https://my.rs-online.com/web/c/switches/push-button-switches-components/push-button-contact-blocks-light-blocks/) across Malaysia. For more details on delivery services and fees, please refer to our [Delivery page](https://my.rs-online.com/web/content/support/all-articles/delivery).



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