Impact Limit Switch

Key Features

• Mechanical actuation: Triggered when physically hit or pressed.
• Types: Roller lever, straight plunger, hinge lever, adjustable arm.
• Contacts: Usually has NO (Normally Open) and NC (Normally Closed) terminals.
• High durability: Designed for industrial environments.
• Electrical rating: Often supports both AC & DC loads.

How It Works

7

1. A moving part of your machine hits the actuator (lever or roller).
2. Inside the switch, metal contacts flip.
3. The switch outputs ON/OFF depending on the wiring (NO or NC).
4. Your controller reads the signal and stops movement or triggers something.

Wiring Example (Arduino/ESP32)

• Connect COM → GND
• Connect NO → GPIO pin (for detecting when it’s pressed)
• Enable internal pull-up in code