From the course: PLC Simulation Software: Factory I/O with Connected Component Workbench
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Optional: Retroreflective sensors overview - Ladder Logic Tutorial
From the course: PLC Simulation Software: Factory I/O with Connected Component Workbench
Optional: Retroreflective sensors overview
- [Instructor] This is an optional video, a refresher to give you an overview on the working mechanism of retro-reflector sensors that are part of the photo electric sensors. These sensors in this scene are retro-reflector sensors. And there is a reflector part as well for each sensor. Retro-reflector sensors act as normally closed contact. They are part of photoelectric sensors. A photoelectric sensor consists of an emitter for emitting light and a receiver for receiving light. The light source for the majority of photoelectric sensors is infrared or visible light, generally red. When the emitted light is interrupted or reflected by the sensing object, it changes the amount of light that arrives at the receiver. The receiver detects the change and converts that into an electrical output. In a retro-reflector sensor, the emitter and the receiver are integrated into a single housing. The light emitted by the emitter is…
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