Time Delay Module Applications

Application Wiring for "Adjustable" DC Time Delay Module

Figure 1. The KH1 Series adjustable ON DELAY module connection diagram. The view is from the flat side with the catalog numbers. Time delay is variable and dependent on the resistance value of Rt. Rt @ 0 Ohm = minimum delay, Rt @ 1M Ohm = maximum delay. Module LOAD at Pin 2 is a relay coil. Rt and relay are customer-supplied components and are connected externally to the module.

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Figure 2. Illustrates a basic time delay module application with an adjustable timing range. In this example, the DC timing module is connected to the power supply, relay coil and potentiometer.

The timing period begins when the power supply is turned on. The relay activates at the end of the time delay and the load is energized through the relay contacts. Turning off the power supply will reset the module and deactivate the relay.

The load connected to the relay's contact terminals is energized upon completion of the time delay period and remains energized until the power supply is turned off. A switch can be connected between Pin 2 and the coil for resetting the module without turning off the power supply.

Application Wiring for "Fixed" DC Time Delay Module

Figure 3. KH1 Series fixed time ON DELAY external connection diagram. The view is from the flat side with the catalog numbers. Time delay is factory preset to one specific time, 5 seconds for example. Module LOAD at Pin 2 is a relay coil.

Figure 4. Outlines a basic application with a "fixed" timing period. The description and operation of the circuit is the same as the above for the "adjustable" DC time delay module only the period is fixed instead of variable.