Omron D4N-1A31 Safety Limit Switch Top Plunger IP67 1NC 1NO

When a machine runs past its intended travel point it can damage parts, stop production, or even create a safety hazard. This problem hurts your bottom line and puts workers at risk. The Omron D4N-1A31 Safety Limit Switch Top Plunger IP67 1NC 1NO stops the motion at the exact moment you need it, giving you reliable control and peace of mind.

Omron D4N-1A31 Safety Limit Switch Top Plunger IP67 1NC 1NO with Omron

You need a sensor that tells you when a moving part has reached its limit, and you need it to work every time. This switch is a rugged top-plunger limit switch that provides a clear 1NC and 1NO contact signal. It protects equipment from over-travel and keeps operators safe. If you run fast machines, you cannot afford guesswork - you need this Omron switch to lock the motion exactly where you set it.

Usages

The switch fits in conveyor belts to stop rollers at the end of a line. It works on packaging machines to detect when a lid has closed. It can be mounted on robotic arms to signal when the arm reaches a safe position. It also serves in door safety systems, elevator limit detection, and any equipment that moves linearly and needs a precise stop point.

Benefits

• Prevents damage by stopping motion exactly at the set point.
• Improves worker safety with reliable cut-off signaling.
• Reduces downtime because the switch lasts millions of cycles.
• Easy to install in tight spaces thanks to its compact top-plunger design.
• Works in dusty or wet environments thanks to IP67 protection.

Key Features

• Top plunger actuator for quick response.
• 1NC and 1NO contacts with slow-action mechanism.
• Maximum operating force of 6.5 newtons.
• Release force as low as 1.5 newtons for easy reset.
• Pre-travel up to 2 mm and over-travel minimum 4 mm.
• IP67 rating protects against water and dust.
• Mechanical durability of at least 15 million operations.
• Electrical durability of 500 000 cycles at 250 V for 3 A.
• Operating temperature from -30 C to 70 C.
• Weight around 82 grams for lightweight mounting.

Specifications

Category	Parameter	Specification
Model Specifications	Actuator Type	Top Plunger
	Conduit Size	Pg13.5 (1-conduit)
	Switch Mechanism	1NC/1NO (Slow-action)
	Contact Form	Zb
Operating Characteristics	Operating Force (OF)	Max 6.5 N
	Release Force (RF)	Min 1.5 N
	Pretravel (PT)	Max 2 mm
	Overtravel (OT)	Min 4 mm
	Operating Position (OP)	18.2 ± 0.5 mm
Ratings & Durability	Protection Degree	IP67 (EN60947-5-1)
	Mechanical Durability	Min 15,000,000 operations
	Electrical Durability (3A)	Min 500,000 operations (250 VAC)
	Electrical Durability (10A)	Min 300,000 operations (250 VAC)
	Rated Insulation Voltage (V)	300 V
	Rated Thermal Current (I)	10 A
Environmental/Physical	Operating Temperature	-30°C to 70°C (no icing)
	Operating Humidity	95% Max
	Weight	Approx. 82 g
Safety & Standards	Direct Opening	NC contact (Forcible separation)
	Compliance	EN115, EN81-1, EN60947-5-1