Reed Relays

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Definition:
A reed relay consists of a coil wrapped around a reed switch. (zone.ni.com)

The switch is composed of two overlapping ferromagnetic blades (called reeds) that are hermetically sealed within an inert-gas-filled glass capsule. When current flows through the coil, a magnetic field is produced that pulls the two reeds together. This completes a signal path through the relay. When the coil is de-energized, the spring force in the reeds pulls the contacts apart. (zone.ni.com)



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