Roller Plunger Limit Switch D4MC-5020 | Mechanical Position Detection Switch

The CNC Electric D4MC-5020 Limit Switch is a high-performance industrial mechanical limit switch designed for accurate position detection, motion control, and safety interlocking in automation systems. Built with a rugged metal actuator head and durable thermoplastic housing, this roller plunger limit switch delivers reliable performance in demanding industrial environments.

This model is ideal for machinery control panels, conveyor systems, packaging machines, CNC machines, elevators, and automated production lines.

 Key Specifications

• Model: D4MC-5020
• Brand: CNC Electric
• Rated Current: 10A at 250VDC
• Utilization Category: A300
• Actuator Type: Roller Plunger
• Contact Type: SPDT (1NO + 1NC)
• Mounting Type: Panel / Surface Mount
• Housing: High-strength industrial grade body
• Cable Entry: Side entry with protective rubber gland

 What is a Limit Switch?

A limit switch is an electromechanical device used to detect the presence or position of an object. When the actuator (roller plunger in this model) is mechanically pressed, the internal contacts change state, sending a control signal to stop, start, or reverse a machine.

It is widely used in:

• Industrial automation
• CNC machinery
• Elevators and hoists
• Conveyor belt systems
• Safety interlock systems
• Door position monitoring
• Robotic arms
• Packaging machines

 Why Choose CNC Electric D4MC-5020?

 Heavy-Duty Roller Plunger Design

The metal roller actuator ensures smooth mechanical triggering with minimal wear, making it ideal for repetitive operations.

 High Electrical Rating (10A 250VDC)

Supports high DC voltage applications compared to standard micro limit switches.

 Durable Industrial Construction

Strong metal head with reinforced housing ensures long service life in dusty and vibration-prone environments.

 Compact Size, Easy Installation

Perfect for tight control panels and machinery enclosures.

 Reliable Contact Performance

SPDT configuration (Normally Open + Normally Closed) allows flexible wiring in control circuits.

 How It Works

When the roller plunger is pressed by a moving object:

• The internal micro-switch mechanism changes contact state.
• The signal is transmitted to PLC, motor starter, or control relay.
• The machine either stops, reverses, or triggers a programmed action.

This makes it essential for:

• End-of-travel detection
• Over-travel protection
• Safety shutdown systems

 Installation Guidance

• Mount securely using panel screws.
• Ensure correct wiring (COM, NO, NC terminals).
• Avoid exceeding rated voltage/current.
• Suitable for both AC and DC control circuits.
• Always test actuator travel before final commissioning.