Fault 1:
Do not exceed the rated voltage of the load current during the use of the OMRON relay, because when the applied rated voltage is too large, it may cause a local short circuit between the cores of the OMRON relay coil and poor operation of the AC operation relay. In addition, there is a possibility that the polarity of the relay is wrong with a surge absorbing diode.
Fault 2:
The poor insulation between the outputs of Omron relays is mainly due to the arc discharge between the relay contacts being distorted by the external magnetic field or the magnetic field generated by the operating coil, reaching the coil terminals and generating flashover. However, the accumulation of carbon or powder scattered from the contacts caused by arcing discharge between the contacts when the OMRON relay is loaded is the root cause of insulation defects that cause insulation operation or a drop in the withstand voltage.
Fault 3:
In the power circuit of Omron relays, the problem of increased contact resistance sometimes occurs. In this case, it is mainly due to the influence of organic matter adhering to the surface of the relay contact, and baking (heating under high vacuum) is carried out to remove the gas discharged from the molded products that make up the relay in advance. We have also developed molded products that significantly reduce gas emissions, and are gradually being used in various products.
Fault 4:
Secondly, the requirements for small and highly sensitive devices for relays are high, so the core wire of the coil is getting thinner and thinner. Because the relay is mounted on a printed circuit board, it has been cleaned, but sometimes the ultrasonic energy is concentrated on the coil core and the wire is broken. This is mainly because the general relay cannot be cleaned with water to clean dust and debris, otherwise in the case of using water, it will produce a strong standing wave, which may cause the coil core to break, so it must be confirmed in advance.
Fault 5:
As the coil temperature of the DC-operated relay increases, the current generated decreases (about 0.4% per 1°C rise), preventing mispolarization of the relays built into the diodes connected in the opposite direction. Otherwise, the relay may vibrate and cause the wire to break, and in severe cases, the relay may be burned directly.
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Selection rules for Omron relays
1. Coil voltage: also known as input voltage, used to control the contact on/off, with AC24V, DC24V, AC220V and other specifications
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Omron PLC formatting method
1. Click [Controller] - [Mode] - [Programming Mode].
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3. Click [Controller] - [Clear All Memory].
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Omron PLC's maintenance process and technical requirements
(1) When measuring voltage, it is necessary to use a digital voltmeter or a universal meter with an accuracy of 1%.
(2) The power supply rack and CPU motherboard can only be removed when the main power supply is cut off;
(3) Before the RAM module is removed from the CPU or plugged into the CPU, the power supply of the PC should be disconnected.
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What are some common failures of Omron?
Common troubleshooting methods for Omron are as follows:
(1) Failure of peripheral circuit components
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There are two simpler ways to communicate:
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What are the common fault phenomena of Omron relays?
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Because the glass insulator of Omron relay is mainly made of metal prongs and glass sintering, it is easy to be damaged in the process of cleaning, overhaul, assembly, etc., such as bending of the pins, falling blocks, cracking, etc., resulting in Omron relays.
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Analysis of common faults and causes of Omron relays
First, the condition that the relay is not turned on
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Omron relay has developed and manufactured a very small standard, leading the relay industry at home and abroad, and occupying a dominant position in the market.
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