Push Buttons are manual switching devices within the Panel Components category, designed to initiate or interrupt electrical circuits by pressing an actuator. They are integral to control systems, enabling operators to start/stop machinery, trigger functions, or activate emergency protocols. Available in momentary (spring-return) or maintained (latching) configurations, push buttons are distinguished by their tactile operation and visual/functional customization.
Push Buttons are actuators mounted on control panels, switchboards, or machinery that allow operators to manually start, stop, or control processes. Schneider’s push buttons are designed for durability, precision, and safe integration into automation systems.
Key Features
- Contact Types:
- Normally Open (NO): Contacts close when pressed, completing the circuit.
- Normally Closed (NC): Contacts open when pressed, breaking the circuit.
- Combination (NO+NC): Provide both contact types in a single unit.
- Actuator Styles:
- Mushroom Head: Large, easy-to-press design for emergency stop (E-stop) applications.
- Flush or Raised: Standard buttons for general use.
- Key-Operated: Require a key to prevent unauthorized access.
- Materials & Construction:
- Housing: Thermoplastic, metal, or stainless steel for durability and corrosion resistance.
- Contacts: Silver alloy, gold-plated, or ceramic for varying load capacities (e.g., 5A to 20A).
- Sealing: IP65/IP67 ratings for dust/water resistance in harsh environments.
- Illumination:
- LED Indicators: Integrated lights (red, green, amber) for status feedback (e.g., power on, fault).
- Voltage Options: 12V DC, 24V DC/AC, 120V AC, or 240V AC compatibility.
- Electrical Ratings:
- Low-Energy Circuits: Signal-level loads (e.g., PLC inputs).
- Power Circuits: Up to 600V AC/DC for motor controls.
- Standards Compliance:
- Safety: IEC 60947-5-1, UL 508, and EN 60204-1 for emergency stop devices.
- Durability: Rated for 1–10 million mechanical cycles depending on quality.
Safety Notes
- Emergency Stops: Must comply with IEC 60947-5-1 for “positive opening” contacts to ensure fail-safe operation.
- Prevent Accidental Activation: Use protective shrouds or key-locking buttons in critical systems.
- Regular Testing: Ensure E-stop functionality is maintained through routine inspections.
Comparison with Selector Switches
While push buttons are single-function actuators, selector switches (rotary or toggle) allow multi-position control (e.g., auto/manual modes). Both are often used together in control panels.