■ Types of Electromagnets
Relays are classified into the following types, depending Relays PDF on
Relays whether
or not they have a permanent Relays PDF magnet.
Non-polarized Relays
Non-polarized Relays datasheet relays do not use a permanent magnet in their Relays PDF
electromagnetic section.
This means that generally the operating coils do not have polarity.
There are some non-polarized relays, such as those with built-in
operation indicators or surge-absorbing diodes, whose operating
coils have polarity.
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OMRON Relays Overview of Relays Manual PDF.