What's a latching relay?
It is a relay that is set (ON) or reset (OFF) by the input of a pulse voltage. Even after the input voltage is interrupted, this relay maintains its set or reset condition until it receives the next inverting input. It is also called a keep relay.
There are two types of mechanisms for maintaining the set and reset conditions:
a magnetic holding type and a mechanical holding type.
There are also two types of coils for applying the set and reset pulse voltages:
a single-winding type and a double-winding type.
|Item||Basic circuit||Operation pattern||Outline|
|In these Relays, the input|
pulse of the set coil causes
the operating condition to
be maintained magnetically
or mechanically, whereas
the input pulse to the reset
coil side puts the Relay into
the reset condition.
|In these Relays, the set|
input pulse causes the
operating condition to be
whereas the reset input
pulse (input with inverse
polarity of set input) puts
the Relay into the reset
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