Time Delay Relays

Time Delay Relays are electromechanical and electronic devices that are used for delaying the action of an electrical circuit, such as the opening or closing of a voltage supply, for a particular timeframe. In automation and control applications, they are often used to provide variable timings for various functions and processes. The specific time delay relay that will be discussed in this article is the 7022ADT. The 7022ADT is an electronic, dual-relay time delay relay.

7022ADT Application Fields

The 7022ADT is designed for control and automation applications requiring adjustable timing functions and precision triggering. The 7022ADT is well-suited for equipment requiring precise and repeatable timing. In industrial settings, they are commonly used to control lighting, motors, pumps, and valves. They can also be used to detect and log an event over a selectable period of time. Additionally, they are frequently used in medical, laboratory and automotive applications, as well as in research and development.

7022ADT Working Principle

The 7022ADT is a dual-relay electric time delay relay that uses an adjustable timing circuit and two relay switches for timing functions. The 7022ADT is a microprocessor controlled device that uses an internal clock to measure the exact duration of the time delay. The timing range can be adjusted from 0.1 seconds to 30 minutes. This range can be altered by changing the values of two internal capacitors. The dual relay switches control two separate circuits. When the time delay is activated, the first relay switch (often referred to as the “master switch”) opens and the second relay switch (often referred to as the “slave switch”) closes. When the time delay ends, the master switch closes and the slave switch opens.

The 7022ADT is widely used in a variety of industrial, commercial, medical, laboratory, and automotive applications. It is especially valuable for its precise and repeatable timing, and its ability to control two separate circuits. As such, it is ideal for large scale automation and control systems, and is an essential component for any application requiring variable and repeatable timings.