D4N-1C20

Ingress Protection:	IP67 - Dust Tight, Waterproof
Mechanical Life:	15,000,000 Cycles
Electrical Life:	300,000 Cycles
Operating Position:	--
Operating Temperature:	-30°C ~ 70°C
Overtravel:	40°
Differential Travel:	--
Pretravel:	18°
Release Force:	51gf
Operating Force:	510gf
Features:	Resin Lever, Resin Roller
Series:	D4N
Termination Style:	Screw Terminal
Mounting Type:	Chassis Mount
Actuator Type:	Side Rotary, Roller
Voltage Rating - DC:	250V
Voltage Rating - AC:	240V
Current Rating:	3A (AC), 270mA (DC)
Switch Function:	On-Mom, Off-Mom
Circuit:	3PST-2NC/1NO
Part Status:	Active
Packaging:	Bulk

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Snap Action, Limit Switches: D4N-1C20 Application Field and Working Principle

Snap-action, limit switches are actuated switches which are triggered by an external force or movement. Specifically, the D4N-1C20 Snap Action, Limit Switch is a robust, two-way switch with a simple, reliable design, equipped with a latching function and wide range of forms and accessories. The primary application field of the D4N-1C20 switch is robotics, where its latching function, wide range of forms and accessories, and reliability make it the ideal choice for robotic systems. It is very often used in robot arms, end-effectors, grippers, and more. Additionally, this switch may be used in applications outside the robotic industry, such as automotive, construction, and even home automation.The D4N-1C20 switch works in one of two modes, depending on the operational requirements: momentary or latching. The momentary mode allows for a signal to be activated when the switch is pressed and released again when the trigger is lifted, while the latching mode activates a circuit for a given amount of time until another switch input changes the state.

Installation and Wiring

Installation of the D4N-1C20 switch is relatively easy thanks to its simple design. The switch contains mounting holes on either side that allow it to be easily secured within a specific mechanical structure. Additionally, the switch has two wiring options, a normally-closed input, and a normally-open input. The normally-closed input will close the circuit when the switch is triggered and the normally-open input opens the circuit. By knowing which of the two wiring options works best for each application, an engineer can easily secure the switch and wire it up to the rest of the system.

Internal Design and Mechanism

The internal design of the D4N-1C20 switch features two independent actuators known as bellows which move inside the switch case as the external force or movement is applied. There are also two biasing springs, one for each actuator, each with a force corresponding to 5.8 N at the rated stroke of 1.5 mm. The motor force required to activate the switch ranges from 6 N to 8 N. The internal mechanism of the switch is designed to create the snap action, where the switch suddenly shifts from one state to another when the external force or movement is applied. This quick action is created by the internal components working together, allowing for a reliable and consistent switching performance.

Conclusion

The D4N-1C20 switch is a robust, two-way switch with a simple and reliable design that is suitable for a wide range of applications, especially within the robotic industry. It features two wiring options, a latching mode, and two independent actuators that work together to create a rapid switching performance. The switch is easy to install and a great choice for robotic systems, automotive, construction, and home automation.

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