Graphic Depication of Latch
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Section 20.1 - Graphic depiction of latch function setpoint
Relay latched
OFF delay
ON delay
Input
signal
Hysteresis
Setpoint
(increasing)
Time
Closed
Open
Relay contact
(N.O.)
Release not possible (setpoint still exceeded)
Release not possible (setpoint-hysteresis still exceeded)
Release not possible (OFF delay still exceeded)
Release possible (manual deactivation)