What Is a Time Delay Relay?

A time delay relay is a device that can be used to control power & automation with a simple switch. There are many types of these devices, but they all perform the same basic functions.

These devices energize the output on application of input voltage. Once the input voltage has been removed, the timing cycle resets.

On-delay timers

Providing time-delayed switching to control a circuit or affect a process, on delay timers are an ideal solution for targeted logic needs. These devices are compact, economical, and easy to use. They are also available with a variety of settings to meet specific application requirements. These features make on-delay timers an excellent choice for industrial applications and OEM equipment.

The operating mode of an on delay timer is determined by the input signal that triggers the device. They can be triggered by either opening or closing a circuit, or by providing an input current. Once the timing coil is energized, the accumulated time increases until it is equal to the preset time. When this happens, the contacts change state; contacts that were open when the coil was not energized will close, and those that were closed will switch to open. The accumulated time resets to zero when the power is removed from the coil.

On-delay timers can be triggered by the activation of a dry-contact control switch, such as a float or limit switch. They can also be activated by voltage or other control signals. These switches can be used to set an interval in a process, such as when the furnace should turn on before air circulation starts. On delay timers are also commonly used to low side gate driver delay the operation of a machine, such as a conveyor that must stay on for a short period after a heater turns off.

Off-delay timers

Whether you need to control the opening of an elevator door or to keep a machine running for a set amount of time, there are many different types of time delay relays available. Each type has its own unique function, and it is important to select the right one for your needs.

This type of timer has a built-in time delay that begins when the output is activated. The output remains energized for the duration of the preset time period, and then it is de-energized. These types of timers are ideal for applications that require a long delay before re-energizing the output.

These timers have capacitors that keep their contacts closed even after the power is removed. They will continue to function for the duration of the off-delay timing setting, which is typically 30 seconds. Once the delay has elapsed, the timer contacts will change from NC to NO and vice versa.

These timers have a special triggering mechanism that only transfers the contact once it loses power. This means that you can’t transfer the contacts manually during the delay period. However, they do reset when power is restored. This is a great feature for applications that need to remain on for a longer duration of time, such as in cooling fans that must stay on after the motor turns off.

Interval-on-operate timers

Time delay relays work by delaying the application of power to an electrical load. This type of relay is commonly used to turn on lighting fixtures for a specified amount of time, then turning them off once the preset period has expired. These relays can be found in residential & commercial applications, like automatic fire alarm systems.

JSZ3 time delay relays have normally open, (instant open on energization) and time delay closed contacts upon de-energization. They’re perfect for control circuits that require a delayed switching action. They’re also used in various types of equipment and industrial machinery.

On-delay and off-delay timers are the most common types of time delay relays in use. However, they are not the only options for timing controls. Other types include interval-on-operate, flasher, and repeat cycle timers.

Interval-on-operate timers work differently from other time delay relays. Upon the initial application of input voltage, the output is energized and the time delay starts counting. Once the accumulated time has equaled the preset time, the contacts change from normally closed to open and remain in that state until the power is removed.

This type of relay can be found in a variety of different applications, from burglar alarms to dispensing equipment. They can be programmed to switch on and off at predetermined intervals, and their timing can be adjusted with a dial or key operation. They’re often used in air-conditioning systems to hold the blower motor in operation for a certain amount of time after the thermostat turns it off. They’re also used in coin-operated dryers in laundries, gas valve controls, telephone circuits, and elevator door controls.

Flasher timers

The 555 timer is a versatile delay timer that can be used in a variety of applications. It can be programmed to generate a square output or an led transformer on and off square output. It can also be used as a flasher. The basic diagram for a flasher is shown below.

In this circuit, the 555 timer IC is connected as an astable multivibrator. This timer can be used to make an LED flasher. The rate at which the LED flashes is determined by the value of resistor R1 and capacitor C1. By increasing or decreasing the values of these components, you can change the rate at which the LED flashes.

The most common type of time relay is the on delay timer, which starts the timing action when a trigger is applied and energizes its output for a set duration after the trigger has been removed. Its main function is to provide the necessary timing for various industrial processes, including the starting of blower motors. It is also used in burglar alarm systems to allow authorized persons time to enter rooms and deactivate the system without it sounding. It can even be used in a variety of dispensing systems to ensure that the correct amount of product is dispensed. This type of one-shot timer is commonly used in a number of different types of systems and processes, including burglar alarms, industrial systems, and door locks.