Relay module is a circuit protection device used in automatic control system, which is usually composed of electromagnet, contact, reset spring, etc. Relay module has the advantages of small size, light weight, simple structure and cheap price, and is often used in circuit to realize switch control, overload protection and other functions.
The relay module can control the closing and breaking of the contact according to the type and size of the input signal, so as to realize the on-off control of the circuit. At the same time, the relay module also has overload protection function, when there is an overload or short circuit in the circuit, the relay will automatically cut off the circuit to protect the safety of the circuit.
There are many types of relay modules, and different models and specifications can be selected according to different application scenarios and needs. For example, some relay modules can be used in AC or DC circuits, and some can be used in high voltage or high current applications. When selecting a relay module, select it according to the requirements of the actual application scenario, and pay attention to whether the voltage and current parameters of the relay module meet the requirements.
In short, the relay module is an indispensable part of the automatic control system, which can realize the on-off control of the circuit and overload protection and other functions to ensure the stability and safety of the system.
Industrial automation: Relay modules can be used in industrial automation systems to achieve logical control, interlocking operation and signal transmission between different devices.
Power systems: In power systems, relay modules can be used to protect, monitor and control circuits, such as overload protection, short circuit protection, etc.
Mechanical control: Relay modules can be used for the control and protection of mechanical equipment, such as motor start, stop and reverse control.
Building automation: In building automation systems, relay modules can be used to control lighting, ventilation, air conditioning and other equipment.
Safety system: Relay modules can be used in safety systems, such as fire alarm, safety door control, etc.
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