Series:	H3DK-F
Part Status:	Active
Lead Free Status / RoHS Status:	--
Relay Type:	Mechanical Relay
Moisture Sensitivity Level (MSL):	--
Function:	Repeat Cycle, Twin Timer
Circuit:	SPDT (1 Form C)
Delay Time:	0.1 Sec ~ 1200 Hrs
Contact Rating @ Voltage:	5A @ 250VAC
Voltage - Supply:	12VDC
Mounting Type:	DIN Rail
Termination Style:	Screw Terminal
Timing Adjustment Method:	Screwdriver Slot
Timing Initiate Method:	Input Voltage

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Time Delay Relays

Introduction

Time delay relays are programmable timing-based machines that operate independently from the input control status and set an exact amount of time before responding to input. These relays use digital control programming to provide user-defined time delays, ensuring automation regardless of the user’s personal preferences. One of the more popular time delay relays in the market is the H3DK-FA DC12.

H3DK-FA DC12 Overview

The H3DK-FA DC12 is a programmable time delay relay controlled by an external DC12 power supply. This relay offers a wide range of flexibility and programmable options, allowing it to be used in multiple different applications. It has a variety of features such as a user-friendly logic operation, output control, timer setting, as well as an adjustable accuracy of up to 0.2%. Additionally, the H3DK-FA DC12 features a solid construction, making it an excellent choice for harsh environments or applications where reliability is a must.

Application Field

The H3DK-FA DC12 is suitable for a wide variety of applications, such as relay-type control systems, motor control systems, and other industrial automation equipment. This time delay relay can also be used as a timer, for instance when it is necessary to start a timer for a specific routine or cycle. Additionally, the H3DK-FA DC12 can be used in process industry for various operations like controlling levels, pumps, valves, etc.

Working Principle

The working principle of the H3DK-FA DC12 is based on the Timer-NEED method, which is a combination of the two functions NOR (Not-On-Ready) and NAND (Not-To-Ready). When power is supplied to the device, the timer is initiated to start counting down the time set by the user before undertaking the task. During this period, the NOR input signal is low and the NAND input signal is high. Once the time set by the user is reached, the NOR input signal is set high and the NAND input signal is set low. This allows the timer to be released and the output signal to signal the completion of the task.

Conclusion

The H3DK-FA DC12 is a versatile time delay relay used for many industrial applications. Its high accuracy, adjustable settings, and solid construction make it a great option for various applications in the industrial market. It has the advantage of allowing users to define exact time delays, thus ensuring automation regardless of the user’s preferences.

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