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Sauce6378
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I am trying to use some 6 volt phototransistor sensors as inputs to a plc. Can someone tell me how come the relay will not energize when the phototransistor is conducting? Thank You
A phototransistor is a type of sensor that converts light into an electrical signal. When light hits the phototransistor, it allows current to flow through it, activating the relay connected to it.
Using a phototransistor to activate a relay allows for a non-contact method of controlling the relay. This is useful in situations where physical contact is not desired or feasible.
Not all types of phototransistors are suitable for activating a relay. The phototransistor must be able to handle the voltage and current requirements of the relay. It is important to check the datasheet of the phototransistor to ensure it is compatible with the relay.
To activate a relay using a phototransistor, the phototransistor is typically connected in series with a resistor and the base of a transistor. The collector of the transistor is then connected to the coil of the relay. When the phototransistor is activated by light, it allows current to flow through the base of the transistor, turning it on and activating the relay.
When using a phototransistor to activate a relay, it is important to ensure that the phototransistor is not exposed to too much light, as this can damage or destroy it. It is also important to use the appropriate resistor to limit the current through the phototransistor and transistor. Additionally, proper grounding and insulation techniques should be used to avoid any electrical hazards.