Talk about optocoupler relay_solid state relay mos output

Talk about optocoupler relay

Optocoupler relay is a type of solid state relay. The English name isSolid State Optronics Relay. Generally, relays are mechanical contacts, which rely on current flowing through the coil to turn into magnetic magnets to attract the contacts, thereby controlling the light-on state. The working principle of an optocoupler relay is similar to that of an optocoupler (in fact, it is the same when looking at the equivalent circuit diagram).

First of all, we need to understand severalprofessional terms of relays:

Form A=normally open contact

Form B=Normally closed contact

Form C=conversion contact

Form E=bistable switch

AT=Ampere Turns Parameter used to describe magnetic field sensitivity

NC is a normally closed contactnormal close 

NO is a normally open contactnormal open

After understanding the above professional terms, you can also understand the nouns on DataSheet. For example, Panasonic’s AQW610 is used on my C8051F board. On the DataSheet of AQW610, this relay is “Form A&B”, that is, it has both normally open contacts and long-closed contacts.

You can take a look at the equivalent circuit diagram of AQW610:

There is a normally open contact and a normally closed contact.

Optocoupler relay (MOSOutput) Features:

>No contacts, so no contacts wear and tear,the service life is unlimited;

>No vibration and bounce; shockproof, anti- Falling;

>No action sound;

>Small size (with direct plug and sticker chip package), high reliability;

>AC/DCCombined use;

>High-speed switching;

>Low discharge voltage;

>Low operating current (current saving);

>Leakage current at low open circuit;

>Completely insulated between input and output.

>Can control various loads (relays, Electric lamps, light-emitting diodes, heaters, motors, electromagnetic suction tubes, etc.).

balabalaSaid a lot, in fact it is Explain that optocoupler relays are not like other relays, such as electromagnetic relays. Electromagnetic relays have a service life, which is usually called Expected Mechanical Life on the DataSheet (Estimated mechanical life) and Expected Electrical Life at Rated Load (estimated load life), mechanical life is generally 10⁷ or 10⁸ times, and load life is generally 10⁵ times. Such as NAIChoose the appropriate optocoupler solid-state relay based on the requirements, number of relays, output structure, etc.

For other introductions toSolid State Optronics Relay, please refer to the following article:

>AN050

Failure Mode of SCR-Output Relays vs. MOSFET-Output Relays at High Temperature

AN060

SLC800 Linear Optocoupler In An Isolation Amplifier Circuit

AN065

Application Note 065 Using the SLC800 and STS700 in a Modem Data Access Arrangement (DAA)