Cut Sheet

158
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Timer Functions
Popular Functions
(Flasher, Pulse Generator, Recycle Timing, Repeat Cycle, Duty Cycling)
OPERATION: Upon application of input voltage, the output (relay or solid state) energizes
and the ON time begins. At the end of the ON time, the output de-energizes and the OFF
time begins. At the end of the OFF time, the output energizes and the cycle repeats as long
as input voltage is applied. The OFF time may be the first delay in some recycling timers.
RESET: Removing input voltage resets the output and time delays, and returns the
sequence to the rst delay.
The time delays in some recycling timers are equal TD1=TD2. Flashers are an example of this type of
recycling timer. Others have separately selectable time delays.
See: HRPD, HRPS, KRPD, KRPS, KSPD, KSPS, KSPU, NHPD, NHPS, NHPU, TDR
Extra Functions Included in Some Recycling Timers:
Instantaneous Contacts:
Some Recycling timers have a set of instantaneous contacts in addition to the delayed contacts.
Instantaneous contacts energize when input voltage is applied and remain until voltage is removed.
RESET SWITCH: Closing an external switch transfers the output and resets the sequence to the rst delay.
See: HRDR
Recycling: (ProgramaCube
®
Functions RE, RD, RXE, RXD)
Delay-on-Break: (ProgramaCube
®
Function B)
(Delay on Release, OFF-delay, Release Delay, Postpurge Delay)
OPERATION: Input voltage must be applied before and during timing. Upon closure of the initiate
switch, the output (relay or solid state) energizes. The time delay begins when the initiate switch is
opened. The output remains energized during timing. At the end of the time delay, the output de-
energizes. The output will energize if the initiate switch is closed when input voltage is applied.
RESET: Reclosing the initiate switch during timing resets the time delay. Removing input voltage resets
the time delay and output.
See: HRPS, HRPU, KRPS, KSPS, KSPU, NHPS, NHPU, TRDU, TDB
Extra Functions Included in Some Delay-on-Break (DOB) Timers:
Instantaneous Contacts:
Some DOB timers have a set of instantaneous contacts in addition to the delayed contacts. Instantaneous
contacts energize when input voltage is applied and remain until voltage is removed.
Related Functions:
Inverted Delay-on-Break: (ProgramaCube
®
Function UB)
OPERATION: Input voltage must be applied before and during timing. Upon closure of the initiate
switch S1, the output (relay or solid state) de-energizes. The time delay begins when S1 is opened. The
output remains de-energized during timing. At the end of the time delay, the output energizes. The
output remains de-energized if S1 is closed when input voltage is applied
RESET: Reclosing S1 during timing resets the time delay. Removing input voltage resets the time delay
and output.
See: HRPS, HRPU, KRPS, KSPS, KSPU, NHPS, NHPU, TRDU
Delay-on-Break (OFF-delay)
Recycling w/Reset Switch
Inverted Delay-on-Break
Legend
V = Voltage
R = Reset
T1 = ON Time
T2 = OFF Time
S1 =Initiate Switch
NO = Normally Open Contact
NC = Normally Closed Contact
t = Incomplete Time Delay
TD, TD1, TD2 = Time Delay
= Undened Time
Appendix A - Timer Functions