Photoelectric Sensor There are four basic components to any photosensor (Fig. 2-32a, b, c): light source, light detector, lenses, and output switching device. There are basically two types of photosensors: LED and photoelectric. Shown in Fig. 2-32d: Line 1 Terminal 1, contact of Hand/Off/Auto Selector switch closed in the hand position as indicated by the […]
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