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What Specific Functions Do Time Delay Relays Perform?

1 ON DELAY:

When power is applied to the coil, the ON DELAY timing period begins and therefore the contacts don’t transfer at this point. At the top of the ON DELAY-time period the contacts transfer, either connecting (normally open contacts) or disconnecting (normally closed contacts) the load. The contacts stay within the transferred state until power is far away from the coil. They then return to their original state and therefore the unit is prepared for a replacement cycle.

 

2 OFF DELAY I:

Power is applied to the coil at the least times. Upon closure of the beginning switch (a “dry” external contact), the contacts transfer, either connecting (normally open contacts) or disconnecting (normally closed contacts) the load. When the beginning switch is opened, the OFF DELAY timing period begins and therefore the contacts stay within the transferred position until the OFF DELAY timing period ends. They then return to their original position and therefore the unit is prepared for a replacement cycle.

 

3 OFF DELAY II:

Power is applied to the coil at the least times. Upon the make and release of the beginning switch (a “dry” external contact), the OFF DELAY timing period begins and therefore the contacts transfer, either connecting (normally open contacts) or disconnecting (normally closed contacts) the load. When the timing period ends, the contacts return to their original position and therefore the unit is prepared for a replacement cycle.

 

4 INTERVAL DELAY:

When power is applied to the coil (the start switch must be jumped in multifunction timers), the INTERVAL timing period begins and therefore the contacts transfer, either connecting (normally open contacts) or disconnecting (normally closed contacts) the load. When the INTERVAL timing period ends, the contacts return to their original position. The unit resets when power is far away from the coil, making the unit ready for a replacement cycle.

 

5 CYCLE 1 SHOT (EQUAL TIME OFF/ON):

When power is applied to the timer, timing starts. The output relay is OFF for the set time then ON for the set time for 1 cycle only. The timer is reset when power is removed or reset input is applied.

 

6 REPEAT CYCLES (EQUAL ON AND OFF DELAY-TIME PERIODS):

When power is applied to the coil, the OFF-time period is initiated; the contacts don’t transfer. At the top of the OFF-time period, the ON-time period begins. The contacts transfer, either connecting (normally open contacts) or disconnecting (normally closed contacts) the load. At the top of the ON period, the contacts transfer, and therefore the cycle continues until power is far away from the coil.

 

7 REPEAT CYCLES (INDEPENDENT ON AND OFF DELAY TIME-PERIODS):

When power is applied to the coil, the ON period is initiated by contact transfer (normally open contacts close, normally closed contacts open). At the top of the OFF period, contacts release, and therefore the ON period begins. The cycle continues until power is far away from the coil.

 

8 SIGNAL INTERVAL/OFF DELAY:

Power is applied to the coil at the least times. Upon closure of the beginning switch (a “dry” external contact), the INTERVAL cycle begins; the contacts transfer, either connecting (normally open contacts) or disconnecting (normally closed contacts) the load. At the top of the INTERVAL cycle, the OFF DELAY cycle begins and therefore the contacts stay transferred until the OFF DELAY cycle ends. The contacts then return to their original positions and therefore the unit is prepared for a replacement cycle.

 

9 SIGNAL ON DELAY/OFF DELAY:

Power is applied to the coil at the least times. Upon closure of the beginning switch (a “dry” external contact), the ON DELAY cycle begins; the contacts don’t transfer. At the top of the ON DELAY cycle the contacts transfer, either connecting (normally open contacts) or disconnecting (normally closed contacts) the load. Upon release of the beginning switch, the OFF DELAY cycle begins; the contacts remain transferred. At the top of the OFF DELAY cycle, the contacts return to their original positions and therefore the unit is prepared for a replacement cycle.

 

10 POWER-OFF DELAYS:

When power is applied to the coil, the contacts transfer, either connecting (normally open contacts) or disconnecting (normally closed contacts) the load. When power is far away from the coil, the OFF DELAY timing period begins; contacts remain transferred. At the top of the OFF DELAY cycle, the contacts return to their original positions and therefore the unit is prepared for a replacement cycle.

 

11 WATCHDOG (RE-TRIGGERABLE SINGLE SHOT):

Upon application of input voltage, the time delay relay is prepared to simply accept trigger signals. Upon application of the trigger signal, the relay is energized and therefore the preset time begins. At the top of the pre-set time, the relay is de-energized unless the trigger signal is closed and opened before the outing (before preset time elapses). Continuous cycling of the trigger signal at a rate faster than the pre-set time will cause the relay to stay energized.

Product Compliance and Suitability:
The product statements contained in this blog are intended for general informational purposes only. Such product statements do not constitute a product recommendation or representation as to the appropriateness, accuracy, completeness, correctness, or currentness of the information provided. Information provided in this guide does not replace the use by you of any manufacturer instructions, technical product manual, or other professional resource or adviser available to you. Always read, understand, and follow all manufacturer instructions.

 

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