What should I pay attention to when buying Omron relays?

Elements that should be paid attention to for relays:

1. Factors of geographical location and climate.

It mainly refers to factors such as altitude, ambient temperature, humidity, and electromagnetic interference. Considering the universal applicability of the control system and the particularity of having to operate reliably for many years, the key parts of the device must be selected with high insulation and strong electrical resistance of the fully sealed type (metal cover sealed or plastic sealed type, metal cover sealing products are better than plastic sealed products) relay products. Because only hermetically sealed relays have excellent long-term resistance to harsh environments, good electrical contact stability, reliability and switching load capacity (the relay is not affected by the external climate environment).

2. Mechanical action elements.

It mainly refers to stress-acting factors such as vibration, shock, and collision. For the control system, the ability to resist stress and mechanical stress is mainly considered, and it is advisable to choose a relay with a balanced armature mechanism.

3. The input parameter element of the excitation coil.

It mainly refers to the parameters such as over-excitation, under-excitation, isolation between low-voltage excitation and high-voltage (220 V) output, influence of temperature change, long-distance wired excitation, electromagnetic interference excitation, etc., which are all factors that must be carefully considered to ensure the reliable operation of power system automation devices. Excitation according to the excitation amount specified by the relay is a necessary condition to ensure its reliable and stable operation.

4. Contact output (switching circuit) parameter elements.

It mainly refers to the nature of contact load, such as lamp load, capacitive load, motor load, inductor, contactor (relay) coil load, resistive load, etc.; Contact load value (open circuit voltage value, closed circuit current value), such as low level load, dry circuit load, small current load, high current load, etc.

Any automation equipment must really determine the actual required load nature and the size of the load value, and it is particularly important to select the appropriate relay products. The failure or reliability of the relay mainly refers to whether the contact can complete the specified switching circuit function. If the actual load of the switch is not the same as the switching load specified by the selected relay, reliability will not be possible.

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Taking Omron relay MY2NJ as an example, there are two kinds of coils: DC24V and AC220V, pin 13 and 14 are connected to the coil, and pin 1, 5, 9 and 4, 8 and 12 have two sets of normally open and normally closed points.

The first step: the contactor is the contact of the contactor coil.

Step 2: When the voltage is added, the intermediate relay acts.

The third step is normally open and normally closed, and after adding voltage, the relay operates normally closed and normally open.

Step 4: If you have contact control for the scanner, you only need to connect the two wires of the scanner separately.

Step 5: Your input signal is returned to the voltage common end.

Usually common Omron relays include small output power Omron relays, small relays, electromagnetic relays, intermediate relays, automotive relays, time relays, temperature relays, etc., while Omron relays are machines and equipment that use the effect of current to close or cut off the power supply circuit for active maintenance and active operation. In most cases, Omron relays are also a solenoid coil whose armature can close or break one or more points of contact. When there is a current flow in the winding resistance of the solenoid coil, the armature is attracted to the solenoid coil, so the contact situation is changed.

Next, the household appliances are small and large, and everyone will briefly introduce the detection method of relay type in detail:

1. Measuring contact resistor.

Use the resistor file of the universal meter to measure the normally closed contact and the moving point resistor, and its resistance should be 0; The resistance of the normally open contact and the moving point is infinite. This makes it possible to distinguish which is a normally closed contact and which is normally open.

2. Test the coil resistance.

The resistance of the solenoid coil of the Omron relay can be measured with the universal meter R 12 gears, and then the solenoid coil can be identified as having an open circuit problem.

3. Measure the suction working voltage and the amount of suction current.

Call the adjustable regulated power supply and the galvanometer, type two sets of working voltages to the Omron relay, and serial the galvanometer in the control loop of the power supply system for detection. Gradually, increase the working voltage of the switching power supply, and record the working voltage and the amount of current when you hear the sound of Omron relay shutting. It can be found, and you can try several times to find the mean.

4. Measure the released working voltage and the amount of current released.

It is all connected as described, when the Omron relay produces a pick-up, and then slowly reduce the working voltage of the first power supply system, when the Omron relay is heard to release the sound again, record the working voltage and current at this time, in order to try to get the average release of the working voltage and the amount of current released several times. Under normal circumstances, the working voltage of Omron relay is about 12 60% of the pick-up working voltage, if the released working voltage is very small (less than 1 12 pick-up work loss voltage), then everything can not be used normally, which will lead to a threat to the reliability of the power supply circuit.

It has the following functions:

..1) Expand the scope of control. For example, when the control signal of a multi-contact relay reaches a certain value, it can be changed, interrupted, and connected to multiple circuits at the same time according to the different forms of contact groups.

..2) Zoom in. For example, sensitive relays, intermediate relays, etc., can control a very large power circuit with a very small amount of control.

..3) Composite signals. For example, when a plurality of control signals are input into a multi-winding relay in a specified form, a predetermined control effect is achieved after comparative synthesis.

..4) Automatic, remote control, monitoring. For example, relays on automatics, together with other electrical appliances, can form a programmed control circuit to achieve automatic operation.

The factory specializes in the production of all kinds of time relays, electromagnetic relays, electronic relays, high-power relays, liquid level relays, solid-state relays, high-power relays, small relays, timers, counters, relays, etc.

Omron relay is an automatic switching element with isolation function, which is widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment, and is one of the most important control components.

Relays generally have an induction mechanism (input part) that can reflect certain input variables (such as current, voltage, power, impedance, frequency, temperature, pressure, speed, light, etc.); There is an actuator (output part) that can realize on-off control of the controlled circuit; Between the input and output parts of the relay, there is also an intermediate mechanism (drive part) that couples and isolates the input quantity, processes the function, and drives the output part.

As a control element, in summary, the relay has the following functions:

1) Expand the control range: for example, when the control signal of the multi-contact relay reaches a certain value, it can be changed, interrupted and connected to multiple circuits at the same time according to the different forms of the contact group.

2) Amplification: For example, sensitive relays, intermediate relays, etc., can control very high-power circuits with a very small control quantity.

3) Comprehensive signal: For example, when a plurality of control signals are input into a multi-winding relay in the prescribed form, the predetermined control effect is achieved after comparative synthesis.

4) Automatic, remote control, monitoring: For example, the relay on the automatic device, together with other electrical appliances, can form a program control circuit, so as to achieve automatic operation.

First of all, the contactor should be the contact of the contactor coil. And when the voltage is added, the intermediate relay starts to act. After adding the voltage, the relay starts to work and will normally close normally open.

If you do the scanner is contact control, then you just need to connect the two wires of the scanner separately. Your input signal is returned to the voltage common via . And when the intermediate relay is closed, the scanner can work.

This is how intermediate relays are wired.

At first glance, Omron thought it was a company from a Western country? In fact, it is a Japanese company founded in 1933 in Tokyo, Japan, and a Japanese company founded in World War II. With more than 80 years of history, Omron has become the world's leading manufacturer of automation control and electronic equipment, and the history of more than 80 years has also enabled the company to have the world's leading technology - sensing and control core technology.

Omron has grown into a giant manufacturer of electrical equipment and has a large share of the global market. And just like the traditional Japanese Noh company, the rigorous corporate connotation and corporate culture are also worthy of recognition.

1. The contact of the contactor is the contact of the contactor coil.

BAY2. When the voltage is added to the DU, the intermediate relay acts. zhi normally open, normally closed, after adding voltage, the relay action normally closed normally open.

4. If your scanner is contact controlled, you only need to connect the two wires of the scanner separately.

5. Your input signal can be returned to the common end of the voltage.

The contactor is the contact of the contactor coil, and when the voltage is added, the intermediate relay acts.

13 and 14 are power supplies (DC 14+13-); 1, 2, 3, 4 are normally closed contacts of 9, 10, 11, 12, respectively;

5, 6, 7, 8 are normally open contacts of 9, 10, 11, 12, respectively; The single contact is 7A, and four contacts can be used in parallel, 28A.

Relay (English name: relay) is an electrical control device, which is an electrical appliance that makes a predetermined step change of the controlled quantity in the electrical output circuit when the change of the input quantity (excitation quantity) reaches the specified requirements.

It has an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in the control circuit of automation, it is actually a kind of "automatic switch" that uses a small current to control the operation of a large current.

Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit.

Structure The coil is mounted on"u"On the shaped magnet, there is a movable armature on the magnet, and two rows of contact shrapnel are mounted on both sides of the magnet. In the non-operating state, the contact shrapnel lifts the armature upwards to maintain a certain gap between the armature and the conductor.

When the electromagnetic torque between the air gaps exceeds the reaction torque, the armature is attracted to the guide magnet, and at the same time, the armature presses the contact shrapnel, so that the normally closed contact is disconnected and the normally open contact is closed, and the relay work is completed.

When the electromagnetic torque is reduced to a certain value, the contact and armature return to the initial position due to the reaction torque of the contact shrapnel, ready for the next work.

This relay"u"The shape of the conductor adopts a double-core structure, that is, coils can be installed on both side posts.

For DZY, DZL and DZJ types, only one coil is installed, while for DZB, DZS, DZK types, it can be installed on another core to maintain the coil or delay damping sheet, etc. As a result, relays with very different coil types all share a single conductor.

3.The principle of intermediate relays is the same as that of AC contactors, which is composed of a fixed iron core, a moving iron core, a spring, a moving contact, a static contact, a coil, a terminal block and a housing.

You have to see whether the intermediate relay is 24V or 110V, 220V, only DC has a positive or negative distinction, according to you, it is possible that the scanner and the relay are of the same voltage, so the contacts can be connected together.