Safety relays and normal relays are distinct devices designed for different applications and with specific characteristics. Here are the key differences between them:
|specific characteristics||Safety Relay||Normal Relay|
|Functions||Safety relays include various functions such as switching, indication, and protection. They are designed to continuously monitor hazardous processes and detect even minor irregularities to ensure safety.||Normal relays are mainly used for basic switching and may not have the extensive protective and monitoring features of safety relays|
|Function and Application||A safety relay is primarily used to implement security functions. It is designed to ensure the safety of individuals and machinery by monitoring and controlling safety-critical processes. Safety relays are used in applications where failure could lead to harm or injury, such as emergency stop systems, safety gates, and safety light curtains||A normal relay, also known as a general or common relay, is an electrically operated switch used for controlling a high-power circuit with a low-power signal. It is commonly employed in control circuits for various purposes, such as switching loads, signaling, and automation|
|Size||Safety relays tend to be larger in size compared to normal relays. Their larger dimensions are due to the advanced circuitry and components required to ensure safety functions.||Normal relays come in smaller sizes as they are primarily used for basic switching within control circuits. Their compact design is suitable for general control applications.|
|Contact Structure||Safety relays are equipped with force-guided contacts, including locked, positive, or captive-guided contacts. These contacts ensure that the relay operates reliably, especially in the event of contact welding or fusion. The design is focused on minimizing the risk of contact failure.||Normal relays typically employ electrically conductive metal contacts for basic switching operations. They lack the force-guided contacts found in safety relays.|
|Color||Safety relays are often designed in a specific color, typically yellow. This distinctive color makes them easily recognizable and helps identify their role in safety applications.||Normal relays are not typically associated with a specific color and are often found in standard colors like white.|
|Dimensions||Safety relays have larger dimensions, such as 17.5 mm, 22.5 mm, etc., to accommodate the necessary safety features and circuitry.||Normal relays have smaller dimensions, making them more compact and suitable for general control applications.|
|Cost||Safety relays are generally more expensive than normal relays due to their specialized safety functions and additional features.||Normal relays are typically more cost-effective as they are used in a wide range of general control and switching applications|
|Applications||Safety relays are commonly used in safety-critical applications where the protection of individuals and machinery is paramount. They are essential for ensuring compliance with safety standards and regulations||Normal relays find their application in a broad spectrum of automation and control systems, where safety considerations are not the primary focus.|
- safety relays and normal relays differ in terms of their size, contact structure, color, dimensions, functions, cost, and application.
- Safety relays are specialized for safety-critical applications and come with enhanced safety features, while normal relays are versatile devices used for general control and switching tasks.
- Understanding the distinctions between these two types of relays is crucial for selecting the appropriate relay for a given application.