To control cost
(and almost anything else)
think inside the box

OPERATION: Upon application of input voltage, TD1 begins and the output (relay or solid state) remains de-energized. At the end of TD1, the TD2 recycle function begins and the output (relay or solid state) cycles ON and OFF for equal delays. This cycle continues until input voltage is removed.
RESET: Removing input voltage resets the output and time delays, and returns the sequence to the first delay.
See:(Click to View Data Sheet) KSPD, KRPD, NHPD, HRPD

V = Voltage    NO = Normally Open Contact    R = Reset 
   NC = Normally Closed Contact    TD1, TD2 = Time Delay