35900f0e_Macromatic_Industrial_Controls__Function
[Operation] Upon application of input voltage, the time delay relay is ready to accept a trigger. When the trigger is applied, the output remains de-energized. Upon removal of the trigger, the output is energized and the time delay (t) begins. At the end of the time delay (t), the output is de-energized unless the trigger is removed and re-applied prior to time out (before time delay (t) elapses). Continuous cycling of the trigger at a rate faster than the time delay (t) will cause the output to remain energized indefinitely. [Function] 
SINGLE SHOT FALLING EDGE
Understanding Time Delay Relay Functions | Macromatic Industrial Controls
Function