PM4HW-H-24V Industrial Controls

Time Delay Relays

Time Delay Relays, also known as TDRs, are electrical switching devices that can be used to control electrical and electronic circuits for a predetermined amount of time. These devices are designed to open or close a circuit at the predetermined length of time and to stay in that state until a reset signal is given. Their use in various applications is mainly determined by the type of delay they provide, their output type and voltage rating.

The PM4HW-H-24V Time Delay Relay is a single-phase device which is designed for use in applications requiring a short delay time, and is rated for 24V DC. It features a minimum delay of 0.1 second and a maximum delay of 10 seconds. This relay is typically used to protect against rapid cycling and surge stress in motor or lighting control systems. It is also used to delay the starting or stopping of motor circuits, to reduce wear on the motor system.

Working Principle

The PM4HW-H-24V Time Delay Relay works by generating an electric current through the device when power is applied. When the device is powered on, it will start a timer that will countdown a set duration of time before the output switch is activated. During the countdown, the output will remain open. When the timer reaches 0, the output is switched on and the contactor is activated. When the output is switched off, the timer will reset and will start the countdown again, until it is triggered again.

Application Fields

• Motor Control Systems: The PM4HW-H-24V Time Delay Relay is most often used in motor control systems, to reduce wear and tear on the motor. By delaying the start and stop times of a motor, it prevents rapid cycling and surge stress on the motor.
• Lighting: The relay can be used to control dimming systems and outdoor lighting systems. By activating the relay at a predetermined time, it can turn the lights on and off at predetermined times, enabling the lights to be set to a fixed schedule.
• Security Systems: The PM4HW-H-24V Time Delay Relay can be used to control security systems, such as door access systems. By delaying the operation of the door, the system can ensure that access is only granted after a certain period of time has passed.

Overall, the PM4HW-H-24V Time Delay Relay is a versatile device that can be used in a wide variety of applications. By enabling the user to control electrical and electronic circuits for a predetermined amount of time, it can be used in a wide range of motor control, lighting, and security systems.