Trigger mechanism: contact deformation causes circuit conduction
When the safety edge is subjected to external pressure (such as collision or extrusion of the human body or object), the flexible outer layer deforms, pushing the internal moving contact to contact the static contact, making the originally disconnected circuit connected (conducted).
After the circuit is turned on, an electrical signal (usually a low-level or switching signal) is generated, which is transmitted to the control system of the equipment (such as PLC, safety relay, etc.) through a wire.
Case: Automated production line for electronic product assembly An electronic product assembly plant has a highly automated production line. The conveyor belt frequently transports parts to be assembled, and the robotic arm accurately grasps and installs them. Safety edges are installed at the starting and ending ends of the conveyor belt and at the edge of the range of motion of the robotic arm. Once, when a worker next to the production line was adjusting the fixture, his body accidentally approached the movement area of the robotic arm and touched the safety edge. After the safety edge is triggered, a signal is immediately fed back to the control system, the conveyor belt stops running instantly, and the robotic arm also stops moving, successfully avoiding collisions between workers and mechanical parts and preventing possible serious injuries. The application of this safety touch edge ensures the safe operation of the automated production line in a complex human-machine interaction environment and protects the safety of workers when maintaining and debugging equipment.
