DAPPRA DPR-1620-NPN-NC Safety Light Curtain Area Sensor

Key Product Information

Main Features

1. 16-Beam Infrared Protective Detection Field

The DPR-1620-NPN-NC uses a multi-beam infrared optical structure consisting of:

• 16 infrared beams
• 20mm optical axis pitch
• 10mm detection resolution

Compared with single-point photoelectric sensors, the Safety Light Curtain Area Sensor creates a wider protective detection zone for monitoring access areas around industrial equipment.

2. Fast 0.5ms Response Speed

The DPR-1620-NPN-NC provides:

• Response Speed: 0.5ms

The fast response capability helps detect beam interruption quickly and supports applications requiring rapid machine safety response.

3. NPN NC Industrial Output Configuration

The DPR-1620-NPN-NC provides:

• NPN transistor output
• NC (Normally Closed) signal logic

This configuration allows integration with industrial control systems including PLC-based automation equipment.

4. Compact Industrial Housing Design

The sensor adopts a compact housing structure:

The compact design allows installation in machines where mounting space is limited.

5. Industrial Protection Performance

The DPR-1620-NPN-NC is designed for industrial environments with:

• IP65 protection rating
• Anti-light interference capability
• Oil and dust resistance design

Technical protection:

Product Advantages

Reliable Machine Protection

The DPR-1620-NPN-NC provides a continuous infrared protective field to monitor dangerous access areas around machinery.

Easy Installation

The system includes:

• Emitter unit
• Receiver unit
• M12 cable connection
• Flexible mounting options

The compact structure simplifies integration into different automation equipment.

Suitable for Industrial Automation

The DPR-1620-NPN-NC is suitable for:

• Manufacturing equipment
• Automated machinery
• CNC systems
• Industrial production lines

Product Configuration

The complete Safety Light Curtain Area Sensor system includes:

Emitter

Function:

• Generates infrared beams
• Provides optical transmission

Connection:

• M12 3-Pin cable
• 2M cable length

Receiver

Function:

• Receives infrared beams
• Detects beam interruption
• Provides output signal

Connection:

• M12 4-Pin cable
• 2M cable length

Why Choose DAPPRA DPR-1620-NPN-NC?

The DPR-1620-NPN-NC combines:

• ✓ Safety Light Curtain technology
• ✓ Infrared LED Through Beam Detection
• ✓ 16-beam protective field
• ✓ 20mm optical axis pitch
• ✓ 10mm resolution
• ✓ 0.5ms fast response
• ✓ NPN NC output
• ✓ IP65 industrial protection
• ✓ SIL 2 safety certification

It provides a practical and reliable solution for industrial machine protection and automation safety applications.

How Does DPR-1620-NPN-NC Safety Light Curtain Area Sensor Work?

The DPR-1620-NPN-NC Safety Light Curtain Area Sensor uses Infrared LED Through Beam Detection technology to create a protective detection field between the emitter and receiver.

The system consists of two main units:

• Emitter
• Receiver

The emitter generates infrared beams, and the receiver continuously monitors the transmitted optical signals.

When an object enters the protected area and interrupts the infrared beam field, the receiver detects the change and sends an output signal to the connected industrial control system.

Working Principle

Detection Process

Step 1 — Infrared Beam Transmission

The emitter uses Infrared LED technology to generate multiple infrared beams.

For DPR-1620-NPN-NC:

• Optical Beam Quantity: 16 beams
• Optical Axis Pitch: 20mm

These beams form a vertical protective detection field.

Step 2 — Beam Monitoring

The receiver monitors the infrared beam status continuously.

Normal condition:

The sensor remains in normal operating status.

Step 3 — Object Detection

When an object enters the detection field:

Emitter and Receiver Function

DPR-1620-NPN-NC Model Number Explanation

The DPR Series uses a structured naming system to identify product configuration.

The model:

DPR-1620-NPN-NC

represents:

Model Code Breakdown

Protection Height Calculation

The DPR Series protection height is determined by:

For DPR-1620-NPN-NC:

Therefore:

DPR-1620-NPN-NC Protection Height = 300mm

Technical Specifications

General Specifications

Optical Specifications

Electrical Specifications

Mechanical Specifications

Connection Specifications

Environmental Specifications

Reliability Specifications

Safety Certification

DAPPRA DPR Series Area Sensor Model Selection Table

The DAPPRA DPR Series includes multiple Industrial Area Sensor configurations with different beam quantities, optical axis pitch, protection heights, output types and signal logic options.

The following table helps engineers select the suitable DPR Series model according to application requirements.

Safety Certification and Compliance

The DAPPRA DPR-1620-NPN-NC Safety Light Curtain Area Sensor is designed for industrial safety applications requiring reliable protective field monitoring and functional safety performance.

The product is supplied with safety and compliance certification documents to support industrial automation and machine protection applications.

SIL 2 Functional Safety Certification

SIL 2 Certified According to IEC 61508

The DPR-1620-NPN-NC is supplied with:

• SIL 2 Certification

according to:

• IEC 61508 Functional Safety Standard

Safety Function

The Safety Light Curtain Area Sensor provides:

• Protective field monitoring
• Beam interruption detection
• Safety-related output signal transmission

When the infrared detection field is interrupted, the receiver detects the change and provides an output signal to the connected control system.

Safety Certification Information

Compliance Certifications

The DPR-1620-NPN-NC is supplied with:

• SIL 2 Certificate — Supports functional safety requirements for industrial safety applications.
• CE Certificate — Demonstrates conformity with applicable European product requirements.
• FCC Certificate — Supports electromagnetic compatibility requirements for electronic equipment.
• RoHS Certificate — Confirms compliance with restrictions on hazardous substances.

Certification Summary

Dimension and Optical Structure

The DPR-1620-NPN-NC combines a compact mechanical design with a multi-beam infrared detection structure.

The sensor configuration includes:

• 16 optical beams
• 20mm optical axis pitch
• 10mm resolution
• 300mm protection height
• 368mm total height

Optical Structure Explanation

The DPR-1620-NPN-NC optical structure is defined by:

Protection Height Calculation

The protection height is calculated according to the optical axis quantity and pitch:

For DPR-1620-NPN-NC:

Therefore:

The DPR-1620-NPN-NC provides a 300mm protective detection height.

Mechanical Structure

Installation Methods

The DPR-1620-NPN-NC supports flexible installation methods to adapt to different industrial machine structures.

Installation options include:

• Top and bottom mounting
• Side mounting
• Cantilever installation

Installation Method 1 — Top and Bottom Mounting

L1 Installation

The mounting brackets are installed at the top and bottom positions of the sensor.

Suitable for:

• Standard machine guarding
• Vertical protective areas
• Equipment access protection

Installation Method 2 — Side Mounting

L2 Installation

The mounting brackets are installed on the side of the sensor body.

Suitable for:

• Limited installation space
• Machine side protection
• Flexible mounting positions

Installation Method 3 — Cantilever Installation

The cantilever mounting method provides additional installation flexibility for special machine structures.

Suitable for:

• Customized machine layouts
• Extended protection areas
• Flexible sensor positioning

Emitter and Receiver Alignment

Correct alignment between emitter and receiver is essential for stable operation.

Installation requirements:

• Emitter and receiver should face each other
• Optical axis direction should be aligned
• Infrared beams should transmit correctly

Correct alignment ensures:

• Stable infrared beam communication
• Reliable detection performance
• Accurate protective field monitoring

Wiring Guide

The DPR-1620-NPN-NC Safety Light Curtain Area Sensor uses separate emitter and receiver units connected through M12 cables.

The wiring configuration includes:

• Emitter M12 3-Pin connection
• Receiver M12 4-Pin connection
• PC SYNC connection
• NPN NC output signal connection

M12 Cable Connection Overview

Emitter Wiring

Emitter M12 3-Pin Connection

The emitter unit generates infrared beams and requires power supply and synchronization connection.

Receiver Wiring

Receiver M12 4-Pin Connection

The receiver monitors infrared beam interruption and provides the output signal.

PC SYNC Connection

The DPR-1620-NPN-NC uses synchronization communication between emitter and receiver.

The black wires are used for:

• PC SYNC

Correct synchronization wiring helps maintain stable communication between the emitter and receiver units.

NPN NC Output Connection

The DPR-1620-NPN-NC provides:

• Output Type: NPN
• Signal Logic: NC (Normally Closed)

Wiring Summary

Industrial Applications

DPR-1620-NPN-NC Safety Light Curtain Area Sensor Applications

The DPR-1620-NPN-NC is designed for industrial machine protection, access monitoring, and automation safety applications.

By creating an infrared protective field between the emitter and receiver, the sensor helps detect intrusion into hazardous machine areas.

CNC Machine Safety Protection

Application Requirement

CNC machines include:

• High-speed moving components
• Cutting tools
• Automated processing systems

Operators may require protection around machine access areas.

DPR-1620-NPN-NC Solution

The sensor provides:

• Infrared protective field monitoring
• Fast 0.5ms response
• NPN NC output
• SIL 2 safety certification

Typical installation:

• CNC machine entrance
• Processing area access point
• Operator protection zone

Press Machine Protection

Application Requirement

Press machines involve:

• High mechanical force
• Rapid movement
• Hazardous working areas

DPR-1620-NPN-NC Solution

Suitable features:

• SIL 2 functional safety
• IEC 61508 compliance
• Multi-beam infrared detection
• Fast interruption detection

Robot Cell Safety

Application Requirement

Industrial robot cells require monitoring of:

• Robot operating zones
• Operator access points
• Automated working areas

DPR-1620-NPN-NC Solution

The sensor provides:

• Protective field detection
• PLC-compatible output
• Compact installation design

Suitable for:

• Robot automation cells
• Assembly robots
• Material handling systems

Automated Production Line Safety

Application Requirement

Production lines include:

• Conveyors
• Assembly stations
• Automated equipment

DPR-1620-NPN-NC Solution

The sensor helps monitor:

• Equipment access areas
• Production safety zones
• Machine operating boundaries

Application Summary

Manufacturing & Quality Assurance

DAPPRA Manufacturing and Quality Control

The DPR Series Safety Light Curtain Area Sensor is produced through controlled manufacturing processes to maintain product consistency and reliability.

DAPPRA manages product quality through:

• Material inspection
• Functional testing
• Aging testing
• Final inspection

Quality Control Process

1. Incoming Material Inspection

All incoming components are inspected before production.

Purpose:

• Verify material quality
• Maintain production consistency
• Reduce component-related issues

2. Functional Testing

Each product is tested to verify:

• Sensor operation
• Beam detection performance
• Emitter and receiver communication
• Output signal function

3. 100% Product Inspection

Every DPR Series Safety Light Curtain Area Sensor undergoes inspection before shipment.

Inspection includes:

• Appearance checking
• Electrical testing
• Functional verification

4. Aging Test

Products undergo aging testing to evaluate:

• Operating stability
• Long-term reliability
• Manufacturing consistency

5. Final Inspection

Before shipment, final inspection confirms:

• Product specification
• Product quality
• Delivery condition

Quality Assurance Flow

How to Select a Safety Light Curtain Area Sensor

Selecting the Correct Safety Light Curtain Area Sensor

Choosing the correct Safety Light Curtain Area Sensor depends on several key parameters:

• Optical axis pitch
• Number of optical beams
• Protection height
• Detection distance
• Output type
• Signal logic
• Installation environment

1. Select Optical Axis Pitch

Optical axis pitch determines the spacing between infrared beams.

DPR Series options:

For DPR-1620-NPN-NC:

2. Select Optical Beam Quantity

The number of optical beams determines the protective height.

Calculation:

Example:

DPR-1620-NPN-NC:

Therefore:

• Beam Quantity: 16
• Protection Height: 300mm

3. Select Detection Distance

Detection distance determines the installation distance between:

• Emitter
• Receiver

DPR-1620-NPN-NC:

Detection Distance: 0.1–3M

4. Select Output Configuration

The DPR Series supports different output options.

Output Type

Signal Logic

DPR-1620-NPN-NC:

NPN + NC

5. Select According to Machine Application

Typical applications:

6. Confirm Installation Method

Before selecting a model, consider:

• Mounting space
• Protective area size
• Emitter/receiver alignment
• Cable routing

DPR-1620-NPN-NC supports:

• Top and bottom mounting
• Side mounting
• Cantilever installation

DPR-1620-NPN-NC Technical Resources

DAPPRA provides technical documents to support product selection, installation and engineering integration.

The following resources help engineers review specifications, understand installation requirements and integrate DPR-1620-NPN-NC into industrial automation systems.

Frequently Asked Questions (FAQ)