KRDM421

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Time Delay Relays

Time delay relays serve an indispensable purpose in applications requiring an electronic component, mechanism, or system to be activated after a certain period of time or when a given condition has been met. KRDM421 is a widely used time delay relay manufactured by KONRIKO. It features a wide range of delay settings ranging from 0 - 15 minutes and can be used in both AC and DC applications. In this article, we will discuss the various applications of KRDM421 as well as the working principle behind this useful device.

Standalone Delay Time Use

KRDM421 is often used as a standalone delay time device. It can be used to delay an operation for a given time period, which can range from 0 - 15 minutes. This is useful for tasks where a delayed operation is required such as auto-locking doors after a certain period of time or for controlling the duration of outdoor lighting. The device is also very useful for ensuring that power is cut off after a set period of time, preventing potential damage if an electrical device is left on for too long.The time delay can be set using the four potentiometers located on the front panel of the device.

Sequential Timer

KRDM421 can also be used as a sequential timer. This is especially useful in industrial applications where multiple operations must be carried out in a specific order. By connecting KRDM421 to a programmable logic controller, it can be used to sequentially activate different operations.For example, KRDM421 can be used to activate the first operation at a preset time and then activate the second operation after a preset time has elapsed. This is very useful for applications where a specific sequence must be followed in order for the system to operate correctly.

Safety Device

KRDM421 can also be used as a safety device. This is especially useful in applications where a hazardous operation must be delayed until an appropriate period of time has elapsed. For example, KRDM421 can be used to control the speed of a moving system, allowing it to respond more quickly to sudden changes in external conditions. This is very useful for applications such as elevator systems, where a system must stop and start according to precise parameters.

Working Principle

The working principle of KRDM421 is quite simple. It consists of several parts including a resistor, a capacitor, a timer, and a switch. The resistor and capacitor form part of the timing circuit, which is used to measure the amount of time required for the device to function. The timer is responsible for setting the amount of time delay, and the switch is used to activate the device.When a signal is sent to the input of KRDM421, the timing circuit will start measuring the time delay. Once the time delay has been measured, a signal will be sent to the switch, which will activate the device.

Conclusion

KRDM421 is a versatile time delay relay that can be used for various applications. It can be used as a standalone delay time device, as a sequential timer, or as a safety device. The working principle of KRDM421 is quite simple and is based on the combination of a resistor, capacitor, timer, and switch. With its wide range of settings, KRDM421 is an ideal choice for any application requiring time delay.

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