Temperature relay nomenclature is explained as follows:
Temperature relay is a kind of electrical equipment specialized in measuring temperature. It is composed of temperature sensing element, comparator and amplifier, etc. It is able to convert the temperature signal collected by the temperature sensing element into an electrical signal, and trigger the switching quantity of the relay according to the set temperature threshold, in order to realize the control and protection of temperature.
I, the working principle of the relay
1, when the coil of the relay is de-energized, the male **** end of the relay is disconnected from the normally open contacts, and the male **** end and normally closed contacts will be closed. At this time the current will not flow through the controlled appliance and the controlled appliance stops working.
2. When power is supplied to the coil of the relay, the male **** end of the relay will be closed by the normally open contact and the male **** end will be disconnected by the normally closed contact. At this time the current will flow through the controlled appliance and the controlled appliance will work.
Two, relay output (DO) interface wiring
1, direct control of AC loads relay wiring instructions
Wise embedded in the IOT IO controller can be directly controlled by the user's low-power 220V power supply equipment on and off. Cut the fire wire of the device to reveal two wire ends, which are connected to the normally open and male **** end of the device.
2, the relay directly control DC load wiring
Wise embedded IOT IO controller can directly control the user's small power DC power supply equipment on and off. Cut off the power supply of the equipment to reveal two terminals, which are connected to the normally open terminal of the equipment and the male **** end.
3, relay control 220V AC contactor wiring instructions
If the user needs to control 220V high-power loads, you can use 220V AC contactor, that is, intelligent embedded IoT IO controller's relay output to control the power supply of the AC contactor coils, so as to control the AC contactor contacts on and off, to achieve high-power equipment control requirements.
4, relay control 380V AC contactor wiring instructions
If the user needs to control 380V high-power loads, you can use the 380V AC contactor, that is, intelligent embedded IoT IO controller relay output to control the AC contactor coil power supply, so as to control the AC contactor contacts, thus realizing the high power equipment control requirements. on and off, so as to realize the control requirements of high-power equipment.
5, relay control DC intermediate relay wiring instructions
If the user needs to control high-power loads, you can also use the DC intermediate relay, that is, the intelligent embedded Internet of Things IO controller's relay output, to control the DC intermediate relay coil power supply to control the intermediate relay contacts of the intermediate relay to realize the control requirements of high-power equipment. control requirements of high-power devices.
Main features of the relay:
1, switching function: the relay can realize the switching function of the circuit, by controlling the input signal of the relay, it can open or close the output circuit of the relay. It can convert low voltage or low current signals to high voltage or high current signals to control higher power circuits or devices.
2, isolation: the relay has an electrical isolation between the input and output, can effectively isolate the control signal and the electrical interference between the controlled circuit, improve the stability and safety of the circuit.
3, reliability: the relay has a high degree of reliability, can work stably for a longer period of time. It has a simple mechanical structure, longer life, and can withstand higher loads and larger currents.
4, a variety of types: there are many types of relays, including electromagnetic relays, solid state relays, time relays and so on. Different types of relays are suitable for different application scenarios and can meet different control needs.