Two basic circuits of photorelay a
Source: InternetPublisher:公子李 Keywords: relay BSP Updated: 2021/03/18
Photoelectric relays use photosensitive elements to convert light energy into electrical energy. Commonly used photosensitive components include photoresistors, photodiodes
, phototransistors, photovoltaic cells and photocoupler devices.
Photoelectric relays are divided into two circuits: light-on and dark-on. Light switching means that the relay is closed when the photosensitive element is exposed to light; dark switching means that the relay is closed when
the photosensitive element is not illuminated. Two basic circuits
of
photoelectric relays
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