how to use relay in logic pro
Relay is an electrical control device in industry, which has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is important for many mechanical devices to protect the circuit safety of the equipment. Its actual logic is an "automatic switch" that uses small current to control large current operation.
This time we will learn about the composition of relays, which usually consist of electromagnetic systems, contact systems, and return mechanisms. When current is applied to the electromagnetic coil of a relay, a magnetic field is generated, which attracts the armature and causes it to move, thereby driving the contact to close or open.
The logic of a relay is also reflected in the configuration of its normally open (NO) and normally closed (NC) contacts.
The normally open contact is in an open state when the relay is not powered on, and closes when powered on; Normally closed contacts are the opposite, they close when not powered on and open when powered on.
Let's give an example of a practical chart:
When we apply a certain amount of current and the relay starts working, when the relay COM terminal moves from NC to NO, a closed circuit is formed, and the relay controls the power supply to turn on the relay
When we apply a current exceeding the maximum capacity of the light bulb, the relay closes. When the COM terminal of the relay moves from NC to NO, the closed circuit is disconnected, and the relay controls the power supply to disconnect the relay
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Relays are not only suitable for controlling electric lights, but they are also excellent in other aspects. For example, this 5-pin relay (T90) performs well in the field of household appliances. Taking the air conditioning system as an example, it can accurately control the start and stop of the air conditioning compressor, achieve temperature adjustment and energy-saving operation within a predetermined time, and effectively ensure the stable operation of the air conditioning control system. We have also made industrial upgrades to this relay, improving the process by using silver contacts to increase its service life. In the field of new energy industry, T90 relay also exhibits high efficiency performance that other relays do not have. For example, in environmentally friendly solar power generation systems, it can be effectively used to control the charging and discharging of batteries, which can protect the batteries and significantly improve energy utilization efficiency
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