Omron Limit Switch

Omron Limit Switch, 2NC Contact Form, IP67 - D4N-2B32

This limit switch is a miniature safety device designed for industrial automation and control panels, providing mechanical actuation and electrical switching for position detection and interlock functions. It is intended for indoor machine and equipment installations where a compact, safety‑oriented actuator is required and meets recognised North American safety standards.

Features & Benefits

• Direct‑opening mechanism ensures positive NC contact separation under deposit conditions
  IP67 enclosure for protection against dust and temporary immersion
  Electrical durability to 500,000 operations at 3A, 250V AC for resistive loads
  Mechanical life rated to 15 million operations for long service cycles
  Rated insulation voltage of 300V supporting medium‑voltage control circuits
  Suitable for microloads down to 1mA at 5V DC for sensitive signal detection

**Applications**

• Suitable for limit sensing on conveyor position control systems
  Ideal for safety interlocks on access doors and guards in machinery
  Used with hoist and lift controls conforming to EN115 and EN81‑1 directives
  Can be used for status detection in PLC‑based automation panels
  Used for replacement installations where CSA or UL approvals are required

What contact arrangements are provided for varied switching needs?

Multiple built‑in contact forms are available including snap‑action 1NC/1NO and 2NC, and slow‑action variants including 2NC/1NO and 3NC to suit different control logic requirements.

How should the device be protected against short circuits?

Use a 10 A fuse type gI or gG conforming to IEC 269 in series as a short‑circuit protection device.

What environmental limits apply to its operation?

It operates from −30°C to 70°C with no icing and up to 95% relative humidity, but should not be used outdoors or where hazardous gases are present.