Series:	H3JA
Part Status:	Obsolete
Mounting Type:	Socketable
Relay Type:	Mechanical Relay
Function:	On-Delay
Circuit:	SPDT (1 Form C)
Delay Time:	0.3 Min ~ 3 Min
Contact Rating @ Voltage:	7A @ 250VAC
Voltage - Supply:	24VDC
Termination Style:	Plug In, 8 Pin (Octal)
Timing Adjustment Method:	Hand Dial
Timing Initiate Method:	Input Voltage

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Time Delay Relays

Time Delay Relays offer vital protection to ensure the safety and prolong the life of machines in industrial and commercial settings. Examples of such relays are the H3JA series relays, and 3M series time delay relays in particular. This article will focus on the H3JA-8A 24VDC 3M - its application field and working principle.

What is the H3JA-8A 24VDC 3M Time Delay Relays?

The H3JA-8A 24VDC 3M is a standardized time-delay relay designed and manufactured by the company Omron. It is a form-C contact, providing three contacts, which are normally closed (N/C) or normally open (N/O). The output contact is switchable between automatic/manual and long/short. The time interval of the delay can be set between 0.3 second up to 10 hours, and the relays have a power supply of 24VDC. The maximum load current is 1A per point.

Applications of the H3JA-8A 24VDC 3M Time Delay Relays

There are many applications where the H3JA-8A 24VDC 3M Time Delay Relays can be used. These relays can be used for all types of automated industrial and commercial equipment. For example, they can be used in machine tools to ensure the safety of the operators by ensuring that the machine stops automatically after a certain period of time. They can also be used to control processes and monitor the temperature in industrial environments. Additionally, they can be used in consumer products such as air conditioners and washing machines to set the amount of time the appliance will be on or off.

Working Principle of the H3JA-8A 24VDC 3M Time Delay Relays

The working principle of the H3JA-8A 24VDC 3M Time Delay Relays is straightforward. When power is supplied, the timer starts, and the output contacts will either open or close depending on the settings. The timer is driven by a DC motor which is controlled by an oscillator. The oscillator’s frequency is determined by the setting of the delay time, which ranges from 0.3 second to 10 hours. The current supplied to the DC motor is regulated by a voltage regulator, while the trigger is supplied by a power supply.When the delay time expires, the output contacts will either open or close, depending on the default settings. The output contacts can also be triggered manually or by an external trigger. This is useful in applications where it is desirable to start the process when certain conditions are met.

Conclusion

The H3JA-8A 24VDC 3M Time Delay Relays is a versatile and reliable device designed to meet the demands of industrial and commercial applications. The relays offer flexibility with their variable time delay setting and wide range of power supply. They are designed to ensure safety, reliability and efficiency by providing output contact control over a certain period of time.

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