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DAPPRA DPR-0420-NPN-NC Safety Light Curtain Industrial Area Sensor

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DAPPRA DPR-0420-NPN-NC is a 4-beam industrial area sensor with 20 mm optical axis pitch and 60 mm protection height. Through-beam infrared detection, NPN NC output, fast response time <5 ms, IP65 protection, ideal for machine protection and industrial automation applications.

4
Beams

20 mm
Pitch

60 mm
Protection Height

126 mm
Total Height

IP65
Protection

NPN NC
Output
atau

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DPR-0420-NPN-NC Industrial Area Sensor

SKU: SD69 DAPPRA Automation

When an object enters the detection area and interrupts the infrared beams, the receiver detects the interruption and changes the sensor output according to the configured signal logic. The DPR-0420-NPN-NC is designed for machine protection and industrial automation applications, including CNC machines, packaging machinery, conveyor systems and robot peripheral protection. The product can also be described as a light curtain-type machine protection sensor, using multiple infrared beams rather than a single-point photoelectric detection method.

Technical Specifications

Parameter Specification
BrandDAPPRA
ManufacturerDAPPRA Automation
Product SeriesDPR Series
ModelDPR-0420-NPN-NC
SKUSD69
Product CategoryIndustrial Area Sensor
Related Product TypeSafety Light Curtain / Light Curtain
Detection MethodThrough Beam Infrared Detection
Beam Quantity4 Beams
Optical Axis Pitch20 mm
Protection Height60 mm
Total Height (Housing)126 mm
Output TypeNPN Output
Signal LogicNC (Normally Closed)
Response Time<5 ms
Power SupplyDC24V ±20%
Protection RatingIP65
Detection Distance0.2–3 m
Ambient Light Resistance10000 Lux
Operating Temperature-10°C to 55°C
Cross Section29 × 30 mm

Key Features

Through-Beam Infrared Detection

4-Beam Detection System with 20 mm Optical Axis Pitch, The DPR-0420-NPN-NC uses an emitter and receiver structure to create a through-beam infrared detection field. With 4 optical beams and 20 mm optical axis pitch, the sensor provides a 60 mm protection height for industrial object detection and machine monitoring. The total housing height is 126 mm.

Technical Attributes

  • Detection Method: Through Beam Infrared Detection
  • Beam Quantity: 4 Beams
  • Optical Axis Pitch: 20 mm
  • Protection Height: 60 mm
  • Total Height (Housing): 126 mm

Fast Response Time <5 ms

The DPR-0420-NPN-NC provides a response time of less than 5 ms, enabling rapid detection when an object interrupts the infrared beam. This feature supports automated equipment requiring fast signal processing and machine control response.

IP65 Industrial Protection

The DPR Series is designed for industrial environments with IP65 protection rating.

It provides resistance against:

  • Dust exposure
  • Water exposure
  • Oil contamination
  • High-humidity operating conditions

High-Humidity Industrial Environment

The DPR Series is suitable for industrial automation equipment operating in environments where humidity and contamination may occur.

Typical applications include:

  • CNC machines
  • Packaging machinery
  • Conveyor systems
  • Automated production equipment

Anti-Vibration and Anti-Interference Design

The DPR-0420-NPN-NC is designed for industrial environments affected by mechanical vibration and electrical interference. The design helps maintain stable operation in automation systems.

NPN NC Output Configuration

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

Operating logic:
Normal beam condition: Signal output 0V
Beam interrupted: No output

Refer to the wiring diagram for connection details.

How Does the DPR-0420-NPN-NC Industrial Area Sensor Work?

Working Principle of DPR-0420-NPN-NC

The DPR-0420-NPN-NC Industrial Area Sensor uses a through-beam infrared detection method with an emitter and receiver. The emitter continuously sends multiple infrared beams toward the receiver to create a detection area. When an object enters the detection zone and blocks one or more beams, the receiver detects the interruption and changes the output signal according to the configured NPN NC logic.

DAPPRA DPR-0420-NPN-NC area sensor working principle
DAPPRA DPR-0420-NPN-NC Area Sensor detects objects for machine protection.

Detection Process

  1. Infrared Beam Transmission — The emitter generates multiple infrared beams and sends them toward the receiver.
  2. Detection Area Creation — The multiple beams create a detection field. For DPR-0420-NPN-NC: Beam Quantity: 4, Optical Axis Pitch: 20 mm, Protection Height: 60 mm.
  3. Object Detection — When an object enters the detection area, one or more infrared beams are interrupted.
  4. Signal Output — The receiver processes the interruption and changes the output signal. DPR-0420-NPN-NC: Output Type: NPN, Signal Logic: NC.

Model Number Explanation

How to Read the DPR-0420-NPN-NC Model Number?

The model number of the DAPPRA DPR Series identifies the main technical configuration, including beam quantity, optical axis pitch, output type and signal logic.

DAPPRA DPR-0420-NPN-NC model number explanation showing DPR series, 4 beams, 20mm optical axis pitch, NPN output and NC signal logic configuration.
How to Read the DAPPRA DPR-0420-NPN-NC Area Sensor Model Number

Model Structure Table

Model CodeMeaningDescription
DPRProduct SeriesDAPPRA DPR Industrial Area Sensor Series
04Beam Quantity4 optical beams
20Optical Axis Pitch20 mm beam spacing
NPNOutput TypeNPN transistor output
NCSignal LogicNormally Closed

Example: DPR-0420-NPN-NC means:

ItemValue
SeriesDPR Series
Beam Quantity4 Beams
Optical Axis Pitch20 mm
OutputNPN
Signal LogicNC
Product TypeIndustrial Area Sensor

How to Select a DPR Series Industrial Area Sensor?

Select According to Application Requirements

The DAPPRA DPR Series provides different beam quantities and optical axis pitch configurations for various industrial detection requirements.

When selecting a suitable Area Sensor, consider the following parameters:

Selection FactorExplanation
Protection HeightDetermines the vertical detection area required for the machine
Optical Axis PitchDetermines beam spacing and detection resolution
Detection DistanceSelect according to emitter and receiver installation distance
Output TypeChoose NPN or PNP according to controller input
Signal LogicSelect NO or NC according to control requirements
Installation EnvironmentConsider humidity, dust, vibration and interference conditions

Understanding Protection Height

The protection height of an Area Sensor is determined by the number of optical beams and the optical axis pitch.

Protection Height = (Beam Quantity - 1) × Optical Axis Pitch

Example: DPR-0420-NPN-NC

Beam Quantity: 4 beams
Optical Axis Pitch: 20 mm
Calculation: (4 - 1) × 20 mm = 60 mm

DPR Series 20 mm Optical Axis Pitch Configuration

The DAPPRA DPR Series Industrial Area Sensor includes different configurations based on beam quantity, optical axis pitch, and protection height.

The complete DPR Series model selection chart is provided below as a technical reference. This table focuses on 20 mm pitch models, with the DPR-0420-NPN-NC highlighted.

ModelBeam QuantityOptical Axis PitchProtection HeightOutput TypeSignal Logic
DPR-0420-NPN-NC420 mm60 mmNPNNC
DPR-0620-NPN-NC620 mm100 mmNPNNC
DPR-0820-NPN-NC820 mm140 mmNPNNC
DPR-1020-NPN-NC1020 mm180 mmNPNNC

Complete DPR Series Selection Chart (reference)

DPR Series Industrial Area Sensor Model Selection Table

The complete selection table includes:

  • 10 mm optical axis pitch models
  • 20 mm optical axis pitch models
  • 40 mm optical axis pitch models
  • Different beam quantity options
  • Corresponding protection height values
  • DPR Series model numbers

NPN NC Output and Wiring

DPR-0420-NPN-NC Wiring

The DPR-0420-NPN-NC uses NPN NC output.

Signal Logic

ConditionSignal
Normal beam transmission0V output
Beam interruptedNo output

DPR-0420-NPN-NC SD69 WIRING DIAGRAM

DAPPRA DPR-0420-NPN-NC SD69 Safety Light Curtain and Area Sensor wiring diagram
Wiring diagram for the DAPPRA DPR-0420-NPN-NC SD69 NPN NC Area Sensor.

Mechanical Dimensions

DPR-0420-NPN-NC Dimensions

  • 60 mm protection height
  • 20 mm optical axis pitch
  • 29 × 30 mm cross section
  • Total height (housing): 126 mm

DPR-0420-NPN-NC SD69 MECHANICAL DIMENSION DRAWING

DAPPRA DPR-0420-NPN-NC SD69 Area Sensor dimension drawing with 20 mm optical axis pitch
Mechanical dimensions of the DAPPRA DPR-0420-NPN-NC SD69 Industrial Area Sensor.

Installation Methods

The DPR-0420-NPN-NC Industrial Area Sensor supports flexible installation methods according to different machine structures and protection requirements.

The sensor can be installed using:

  • Standard Vertical Installation
  • Side Installation
  • Adjustable Bracket Installation

DPR-0420-NPN-NC Installation Methods

DAPPRA DPR-0420-NPN-NC SD69 Area Sensor and Light Curtain installation methods
Installation options for the DAPPRA DPR-0420-NPN-NC SD69 Area Sensor and light curtain system.

Standard Vertical Installation

The standard vertical installation method places the emitter and receiver vertically opposite each other to create a detection area.

Suitable for:

  • CNC machines
  • Press machines
  • Machine entrances
  • Safety protection areas

Side Installation

Side installation allows the sensor to be mounted according to machine structure limitations where standard mounting space is restricted.

Suitable for:

  • Compact equipment
  • Limited installation space
  • Customized machine layouts

Adjustable Bracket Installation

The adjustable bracket installation method allows flexible positioning and alignment of the emitter and receiver.

Advantages:

  • Easier alignment
  • Flexible mounting angle adjustment
  • Suitable for customized automation equipment

Industrial Applications

DPR-0420-NPN-NC Application Areas

The DAPPRA DPR-0420-NPN-NC Industrial Area Sensor is designed for industrial automation equipment requiring reliable object detection and machine protection.

With multi-beam infrared detection, fast response time and industrial protection features, the DPR Series can be applied in various automated production environments.

Typical applications include:

  • CNC machines
  • Press and hydraulic machines
  • Packaging machinery
  • Conveyor systems
  • Robot workcells

DPR-0420-NPN-NC Industrial Application Overview

DAPPRA DPR-0420-NPN-NC SD69 Area Sensor Safety Light Curtain for machine protection
DAPPRA DPR-0420-NPN-NC SD69 used as an Area Sensor and machine protection solution for equipment.

CNC Machine Protection

The DPR-0420-NPN-NC can be installed around CNC machining equipment to create a detection area for machine monitoring and protection applications.

Typical equipment:

  • CNC machining centers
  • Milling machines
  • Turning machines

Press Machine Protection

The multi-beam infrared detection area of DPR Series sensors can be used around industrial press and hydraulic equipment.

Typical applications:

  • Hydraulic presses
  • Punching machines
  • Metal forming equipment

Packaging Machinery

DPR Series sensors support object detection applications in automated packaging equipment.

Typical applications:

  • Packaging lines
  • Filling machines
  • Automatic assembly systems

Conveyor System Detection

The DPR-0420-NPN-NC can be integrated into conveyor automation systems for object detection and machine control applications.

Typical applications:

  • Material handling systems
  • Production conveyors
  • Automated logistics equipment

Robot Workcell Protection

The DPR-0420-NPN-NC can be installed around industrial robot workcells to create a multi-beam infrared detection area.

Typical applications:

  • Robotic assembly cells
  • Automated manufacturing lines
  • Robot peripheral areas

Industrial Environment & Safety Performance

Designed for Demanding Industrial Automation Environments

The DAPPRA DPR-0420-NPN-NC Industrial Area Sensor is designed for demanding industrial automation environments where equipment may be exposed to humidity, water, oil contamination, mechanical vibration and electromagnetic interference.

The DPR Series provides reliable detection performance for industrial machine applications with:

  • High humidity resistance
  • Water and oil protection
  • Anti-vibration design
  • Anti-interference capability
  • IP65 protection rating

The DPR-0420-NPN-NC is suitable for industrial equipment requiring stable operation in challenging manufacturing environments.

Industrial Environment Specification

ParameterSpecification
Protection RatingIP65
Operating Temperature-10°C to 55°C
Ambient Light Resistance10000 Lux
Environmental FeaturesHumidity Resistance / Oil Protection / Anti-Vibration / Anti-Interference

Safety Light Curtain for Machine Protection

The DAPPRA DPR-0420-NPN-NC belongs to the Industrial Area Sensor / Safety Light Curtain category for machine protection applications.

Unlike single-point photoelectric sensors, the DPR-0420-NPN-NC uses multiple infrared beams between the emitter and receiver to create a detection zone.

The sensor provides:

  • Multi-beam infrared detection
  • Fast response time <5 ms
  • NPN NC output configuration
  • Machine protection applications

Product Compliance Documentation

DAPPRA DPR-0420-NPN-NC is supported by the following compliance documentation:

  • CE Certification
  • FCC Certification
  • RoHS Compliance

Area Sensor vs Single-Point Photoelectric Sensor

FeatureArea SensorSingle-Point Photoelectric Sensor
Detection methodMultiple infrared beamsSingle optical detection point
Detection areaMulti-beam areaSingle point
Beam quantityMultipleTypically one detection beam
Typical useArea detection and machine protectionObject presence / position detection
DPR SeriesYesNo

Area Sensor vs Safety Light Curtain

The terms Area Sensor and Safety Light Curtain can overlap in industrial applications, but they should not automatically be treated as identical technical classifications.

An Area Sensor generally describes a multi-beam photoelectric detection device.

A safety-rated light curtain is normally associated with specific functional-safety requirements and applicable safety standards.

For the DPR-0420-NPN-NC page, DAPPRA should therefore clearly describe the product as:

Industrial Area Sensor / Safety Light Curtain for Machine Protection

Market Terminology Note: Safety Light Curtain vs Area Sensor in Indonesia

In the Indonesian industrial automation market, products like the DAPPRA DPR-0420-NPN-NC are commonly referred to as either a "Safety Light Curtain" or an "Area Sensor", depending on the specific application and user terminology.

While these two terms are often used interchangeably to describe similar light-beam sensing products, they should not automatically be considered identical from a technical and safety standards perspective. The appropriate choice of terminology—and the product itself—depends on several key factors:

  • Required Safety Function: Does your application require personnel or equipment protection that meets a specific safety level, or is it for general object presence detection?
  • Detection Resolution: What is the smallest object size that needs to be detected? This directly relates to the optical axis pitch (e.g., 20 mm for this product).
  • Application Scenario: Is it for machine entrance safeguarding, or for object counting and positioning on a conveyor belt?
  • Output Configuration: Does your control system require an NPN or PNP output?
  • Applicable Safety Standards: Does the product possess the necessary safety certifications to support your safety claim?

For the DPR-0420-NPN-NC, it combines the multi-beam detection flexibility of an "Area Sensor" with the machine protection capabilities of a "Safety Light Curtain." Therefore, in the Indonesian market, it can be effectively positioned and applied as either a high-performance area sensor for automation control or as a reliable safety light curtain component for integration into machine protection systems.

Choosing the correct terminology helps ensure clear communication with suppliers, integrators, and end-users, ensuring the product is correctly applied to its intended scenario. For more details on specific applications, please refer to the Industrial Applications section above.

Parameter Dictionary

Optical Axis Pitch
The distance between adjacent optical detection beams.
DPR-0420-NPN-NC: 20 mm

Beam Quantity
The number of optical beams used to form the detection field.
DPR-0420-NPN-NC: 4 beams

Protection Height
The vertical detection height created by the optical beam arrangement.
DPR-0420-NPN-NC: 60 mm

Total Height (Housing)
The overall height of the sensor housing including end caps.
DPR-0420-NPN-NC: 126 mm

Detection Distance
The distance between the emitter and receiver within which the sensor operates.
DPR-0420-NPN-NC: 0.2–3 m

Response Time
The time required for the sensor to respond to a detected beam interruption.
DPR-0420-NPN-NC: <5 ms

NPN Output
A transistor output configuration used for connection to industrial control systems such as PLC inputs.

NC Signal Logic
Normally Closed signal logic. For the specified DPR-0420-NPN-NC configuration, normal beam transmission produces the specified 0V signal condition, while beam interruption removes the output.

DAPPRA Automation — Industrial Sensor Manufacturer

DAPPRA Automation is an industrial automation manufacturer and platform providing industrial control components, sensors, drives and supporting components for automation applications.

The DPR Series Industrial Area Sensor is manufactured by DAPPRA's own production facility, supporting consistent product quality control and customized production requirements.

OEM & ODM Services

DAPPRA provides OEM and ODM manufacturing services based on customer designs, specifications or samples.

OEM & ODM support includes:

  • Product customization
  • Manufacturing based on customer requirements
  • Customized industrial automation solutions

Global Service Markets

DAPPRA provides industrial automation products and OEM/ODM services for customers in:

  • Indonesia
  • Vietnam
  • Russia

Factory Production Capability

DAPPRA Automation factory production line manufacturing DPR Series industrial area sensors
DAPPRA Automation production facility supporting the manufacturing of DPR Series Industrial Area Sensors and industrial automation components.

Technical Resources

Download technical documents for the DAPPRA DPR-0420-NPN-NC Industrial Area Sensor, including datasheet, CAD drawing and installation guide.

DPR-0420-NPN-NC Datasheet

Technical specification document including product parameters, working principle, wiring information, dimensions, certifications and application details.

Download PDF →

DPR-0420-NPN-NC Installation Guide

Installation reference showing mounting methods, vertical installation, side installation and adjustable bracket installation.

Download Guide →

DPR-0420-NPN-NC CAD Drawing

Mechanical drawing resource for engineers, including product dimensions and installation reference for machine integration.

Download CAD →

Engineering FAQ

The following FAQ provides technical information about the DAPPRA DPR-0420-NPN-NC Industrial Area Sensor, including product specifications, output configuration, applications, environmental performance and certification information.

What is the DAPPRA DPR-0420-NPN-NC? +

The DAPPRA DPR-0420-NPN-NC is a DPR Series Industrial Area Sensor designed for machine protection and industrial automation applications.

Features: 4 beams, 20 mm pitch, 60 mm protection height, 126 mm total housing height, NPN NC output.

What is the SKU of the DPR-0420-NPN-NC? +

The SKU of the DPR-0420-NPN-NC is: SD69

What does DPR-0420-NPN-NC mean? +

DPR = DAPPRA DPR Series, 04 = 4 Optical Beams, 20 = 20 mm Optical Axis Pitch, NPN = NPN Output, NC = Normally Closed Signal Logic.

What is the detection distance of the DPR-0420-NPN-NC? +

The DPR-0420-NPN-NC has a detection distance of 0.2–3 m.

How many beams does the DPR-0420-NPN-NC have? +

The DPR-0420-NPN-NC uses: 4 infrared optical beams.

What is the optical axis pitch? +

The optical axis pitch is: 20 mm.

What is the protection height? +

The DPR-0420-NPN-NC provides: 60 mm protection height. Calculation: (4 - 1) × 20 mm = 60 mm.

What is the total height of the DPR-0420-NPN-NC housing? +

The total height of the sensor housing is 126 mm.

What is the detection method? +

The DPR-0420-NPN-NC uses: through-beam infrared detection.

What is the response time? +

The response time is: <5 ms.

What is the IP rating of the DPR-0420-NPN-NC? +

The DPR-0420-NPN-NC has an IP65 protection rating.

What is the operating temperature? +

The operating temperature range is -10°C to +55°C.

What output does the DPR-0420-NPN-NC use? +

The DPR-0420-NPN-NC uses: NPN NC output configuration.

What does NC mean? +

NC means Normally Closed. Normal beam condition = 0V output, beam interruption = no output.

What is the power supply? +

The power supply is: DC24V ±20%.

How should the DPR-0420-NPN-NC be wired? +

Refer to the official DAPPRA wiring diagram. Includes DC24V power, M12 connector, NPN NC output.

Can the DPR-0420-NPN-NC be connected to a PLC? +

Yes. The NPN NC output can be connected to compatible PLC input circuits.

Can the DPR-0420-NPN-NC be used in humid environments? +

Yes. Designed for high humidity, water, oil protection with IP65 rating.

Is the DPR-0420-NPN-NC resistant to oil? +

Yes. The DPR Series is designed for environments where oil contamination may occur.

Is the DPR-0420-NPN-NC resistant to vibration? +

Yes. It incorporates anti-vibration design for industrial machinery.

Is the DPR-0420-NPN-NC resistant to interference? +

Yes. Designed with interference-resistant capability.

Can the DPR-0420-NPN-NC be used on CNC machines? +

Yes. Suitable for CNC machine protection and detection applications.

Can it be used on press machines? +

Yes. Suitable for industrial press and hydraulic machine applications.

Can it be used on packaging machines? +

Yes. Suitable for automated packaging machinery requiring multi-beam detection.

Can it be used on conveyor systems? +

Yes. Can be integrated into conveyor automation systems.

Can it be used around industrial robots? +

Yes. For robot peripheral protection and workcell detection.

Where can the DPR-0420-NPN-NC be used? +

Industrial detection and machine protection: CNC, press, conveyors, packaging, production lines.

What certifications are available? +

CE, FCC, RoHS.

How do I choose the right DPR Series area sensor? +

Select based on beam quantity, optical axis pitch, protection height, output type, and sensing distance. DPR-0420-NPN-NC offers 4 beams, 20 mm pitch, 60 mm protection height, NPN NC output.

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DPR-0420-NPN-NC Industrial Area Sensor

SKU: SD69 DAPPRA Automation

When an object enters the detection area and interrupts the infrared beams, the receiver detects the interruption and changes the sensor output according to the configured signal logic. The DPR-0420-NPN-NC is designed for machine protection and industrial automation applications, including CNC machines, packaging machinery, conveyor systems and robot peripheral protection. The product can also be described as a light curtain-type machine protection sensor, using multiple infrared beams rather than a single-point photoelectric detection method.

Technical Specifications

Parameter Specification
BrandDAPPRA
ManufacturerDAPPRA Automation
Product SeriesDPR Series
ModelDPR-0420-NPN-NC
SKUSD69
Product CategoryIndustrial Area Sensor
Related Product TypeSafety Light Curtain / Light Curtain
Detection MethodThrough Beam Infrared Detection
Beam Quantity4 Beams
Optical Axis Pitch20 mm
Protection Height60 mm
Total Height (Housing)126 mm
Output TypeNPN Output
Signal LogicNC (Normally Closed)
Response Time<5 ms
Power SupplyDC24V ±20%
Protection RatingIP65
Detection Distance0.2–3 m
Ambient Light Resistance10000 Lux
Operating Temperature-10°C to 55°C
Cross Section29 × 30 mm

Key Features

Through-Beam Infrared Detection

4-Beam Detection System with 20 mm Optical Axis Pitch, The DPR-0420-NPN-NC uses an emitter and receiver structure to create a through-beam infrared detection field. With 4 optical beams and 20 mm optical axis pitch, the sensor provides a 60 mm protection height for industrial object detection and machine monitoring. The total housing height is 126 mm.

Technical Attributes

  • Detection Method: Through Beam Infrared Detection
  • Beam Quantity: 4 Beams
  • Optical Axis Pitch: 20 mm
  • Protection Height: 60 mm
  • Total Height (Housing): 126 mm

Fast Response Time <5 ms

The DPR-0420-NPN-NC provides a response time of less than 5 ms, enabling rapid detection when an object interrupts the infrared beam. This feature supports automated equipment requiring fast signal processing and machine control response.

IP65 Industrial Protection

The DPR Series is designed for industrial environments with IP65 protection rating.

It provides resistance against:

  • Dust exposure
  • Water exposure
  • Oil contamination
  • High-humidity operating conditions

High-Humidity Industrial Environment

The DPR Series is suitable for industrial automation equipment operating in environments where humidity and contamination may occur.

Typical applications include:

  • CNC machines
  • Packaging machinery
  • Conveyor systems
  • Automated production equipment

Anti-Vibration and Anti-Interference Design

The DPR-0420-NPN-NC is designed for industrial environments affected by mechanical vibration and electrical interference. The design helps maintain stable operation in automation systems.

NPN NC Output Configuration

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

Operating logic:
Normal beam condition: Signal output 0V
Beam interrupted: No output

Refer to the wiring diagram for connection details.

How Does the DPR-0420-NPN-NC Industrial Area Sensor Work?

Working Principle of DPR-0420-NPN-NC

The DPR-0420-NPN-NC Industrial Area Sensor uses a through-beam infrared detection method with an emitter and receiver. The emitter continuously sends multiple infrared beams toward the receiver to create a detection area. When an object enters the detection zone and blocks one or more beams, the receiver detects the interruption and changes the output signal according to the configured NPN NC logic.

DAPPRA DPR-0420-NPN-NC area sensor working principle
DAPPRA DPR-0420-NPN-NC Area Sensor detects objects for machine protection.

Detection Process

  1. Infrared Beam Transmission — The emitter generates multiple infrared beams and sends them toward the receiver.
  2. Detection Area Creation — The multiple beams create a detection field. For DPR-0420-NPN-NC: Beam Quantity: 4, Optical Axis Pitch: 20 mm, Protection Height: 60 mm.
  3. Object Detection — When an object enters the detection area, one or more infrared beams are interrupted.
  4. Signal Output — The receiver processes the interruption and changes the output signal. DPR-0420-NPN-NC: Output Type: NPN, Signal Logic: NC.

Model Number Explanation

How to Read the DPR-0420-NPN-NC Model Number?

The model number of the DAPPRA DPR Series identifies the main technical configuration, including beam quantity, optical axis pitch, output type and signal logic.

DAPPRA DPR-0420-NPN-NC model number explanation showing DPR series, 4 beams, 20mm optical axis pitch, NPN output and NC signal logic configuration.
How to Read the DAPPRA DPR-0420-NPN-NC Area Sensor Model Number

Model Structure Table

Model CodeMeaningDescription
DPRProduct SeriesDAPPRA DPR Industrial Area Sensor Series
04Beam Quantity4 optical beams
20Optical Axis Pitch20 mm beam spacing
NPNOutput TypeNPN transistor output
NCSignal LogicNormally Closed

Example: DPR-0420-NPN-NC means:

ItemValue
SeriesDPR Series
Beam Quantity4 Beams
Optical Axis Pitch20 mm
OutputNPN
Signal LogicNC
Product TypeIndustrial Area Sensor

How to Select a DPR Series Industrial Area Sensor?

Select According to Application Requirements

The DAPPRA DPR Series provides different beam quantities and optical axis pitch configurations for various industrial detection requirements.

When selecting a suitable Area Sensor, consider the following parameters:

Selection FactorExplanation
Protection HeightDetermines the vertical detection area required for the machine
Optical Axis PitchDetermines beam spacing and detection resolution
Detection DistanceSelect according to emitter and receiver installation distance
Output TypeChoose NPN or PNP according to controller input
Signal LogicSelect NO or NC according to control requirements
Installation EnvironmentConsider humidity, dust, vibration and interference conditions

Understanding Protection Height

The protection height of an Area Sensor is determined by the number of optical beams and the optical axis pitch.

Protection Height = (Beam Quantity - 1) × Optical Axis Pitch

Example: DPR-0420-NPN-NC

Beam Quantity: 4 beams
Optical Axis Pitch: 20 mm
Calculation: (4 - 1) × 20 mm = 60 mm

DPR Series 20 mm Optical Axis Pitch Configuration

The DAPPRA DPR Series Industrial Area Sensor includes different configurations based on beam quantity, optical axis pitch, and protection height.

The complete DPR Series model selection chart is provided below as a technical reference. This table focuses on 20 mm pitch models, with the DPR-0420-NPN-NC highlighted.

ModelBeam QuantityOptical Axis PitchProtection HeightOutput TypeSignal Logic
DPR-0420-NPN-NC420 mm60 mmNPNNC
DPR-0620-NPN-NC620 mm100 mmNPNNC
DPR-0820-NPN-NC820 mm140 mmNPNNC
DPR-1020-NPN-NC1020 mm180 mmNPNNC

Complete DPR Series Selection Chart (reference)

DPR Series Industrial Area Sensor Model Selection Table

The complete selection table includes:

  • 10 mm optical axis pitch models
  • 20 mm optical axis pitch models
  • 40 mm optical axis pitch models
  • Different beam quantity options
  • Corresponding protection height values
  • DPR Series model numbers

NPN NC Output and Wiring

DPR-0420-NPN-NC Wiring

The DPR-0420-NPN-NC uses NPN NC output.

Signal Logic

ConditionSignal
Normal beam transmission0V output
Beam interruptedNo output

DPR-0420-NPN-NC SD69 WIRING DIAGRAM

DAPPRA DPR-0420-NPN-NC SD69 Safety Light Curtain and Area Sensor wiring diagram
Wiring diagram for the DAPPRA DPR-0420-NPN-NC SD69 NPN NC Area Sensor.

Mechanical Dimensions

DPR-0420-NPN-NC Dimensions

  • 60 mm protection height
  • 20 mm optical axis pitch
  • 29 × 30 mm cross section
  • Total height (housing): 126 mm

DPR-0420-NPN-NC SD69 MECHANICAL DIMENSION DRAWING

DAPPRA DPR-0420-NPN-NC SD69 Area Sensor dimension drawing with 20 mm optical axis pitch
Mechanical dimensions of the DAPPRA DPR-0420-NPN-NC SD69 Industrial Area Sensor.

Installation Methods

The DPR-0420-NPN-NC Industrial Area Sensor supports flexible installation methods according to different machine structures and protection requirements.

The sensor can be installed using:

  • Standard Vertical Installation
  • Side Installation
  • Adjustable Bracket Installation

DPR-0420-NPN-NC Installation Methods

DAPPRA DPR-0420-NPN-NC SD69 Area Sensor and Light Curtain installation methods
Installation options for the DAPPRA DPR-0420-NPN-NC SD69 Area Sensor and light curtain system.

Standard Vertical Installation

The standard vertical installation method places the emitter and receiver vertically opposite each other to create a detection area.

Suitable for:

  • CNC machines
  • Press machines
  • Machine entrances
  • Safety protection areas

Side Installation

Side installation allows the sensor to be mounted according to machine structure limitations where standard mounting space is restricted.

Suitable for:

  • Compact equipment
  • Limited installation space
  • Customized machine layouts

Adjustable Bracket Installation

The adjustable bracket installation method allows flexible positioning and alignment of the emitter and receiver.

Advantages:

  • Easier alignment
  • Flexible mounting angle adjustment
  • Suitable for customized automation equipment

Industrial Applications

DPR-0420-NPN-NC Application Areas

The DAPPRA DPR-0420-NPN-NC Industrial Area Sensor is designed for industrial automation equipment requiring reliable object detection and machine protection.

With multi-beam infrared detection, fast response time and industrial protection features, the DPR Series can be applied in various automated production environments.

Typical applications include:

  • CNC machines
  • Press and hydraulic machines
  • Packaging machinery
  • Conveyor systems
  • Robot workcells

DPR-0420-NPN-NC Industrial Application Overview

DAPPRA DPR-0420-NPN-NC SD69 Area Sensor Safety Light Curtain for machine protection
DAPPRA DPR-0420-NPN-NC SD69 used as an Area Sensor and machine protection solution for equipment.

CNC Machine Protection

The DPR-0420-NPN-NC can be installed around CNC machining equipment to create a detection area for machine monitoring and protection applications.

Typical equipment:

  • CNC machining centers
  • Milling machines
  • Turning machines

Press Machine Protection

The multi-beam infrared detection area of DPR Series sensors can be used around industrial press and hydraulic equipment.

Typical applications:

  • Hydraulic presses
  • Punching machines
  • Metal forming equipment

Packaging Machinery

DPR Series sensors support object detection applications in automated packaging equipment.

Typical applications:

  • Packaging lines
  • Filling machines
  • Automatic assembly systems

Conveyor System Detection

The DPR-0420-NPN-NC can be integrated into conveyor automation systems for object detection and machine control applications.

Typical applications:

  • Material handling systems
  • Production conveyors
  • Automated logistics equipment

Robot Workcell Protection

The DPR-0420-NPN-NC can be installed around industrial robot workcells to create a multi-beam infrared detection area.

Typical applications:

  • Robotic assembly cells
  • Automated manufacturing lines
  • Robot peripheral areas

Industrial Environment & Safety Performance

Designed for Demanding Industrial Automation Environments

The DAPPRA DPR-0420-NPN-NC Industrial Area Sensor is designed for demanding industrial automation environments where equipment may be exposed to humidity, water, oil contamination, mechanical vibration and electromagnetic interference.

The DPR Series provides reliable detection performance for industrial machine applications with:

  • High humidity resistance
  • Water and oil protection
  • Anti-vibration design
  • Anti-interference capability
  • IP65 protection rating

The DPR-0420-NPN-NC is suitable for industrial equipment requiring stable operation in challenging manufacturing environments.

Industrial Environment Specification

ParameterSpecification
Protection RatingIP65
Operating Temperature-10°C to 55°C
Ambient Light Resistance10000 Lux
Environmental FeaturesHumidity Resistance / Oil Protection / Anti-Vibration / Anti-Interference

Safety Light Curtain for Machine Protection

The DAPPRA DPR-0420-NPN-NC belongs to the Industrial Area Sensor / Safety Light Curtain category for machine protection applications.

Unlike single-point photoelectric sensors, the DPR-0420-NPN-NC uses multiple infrared beams between the emitter and receiver to create a detection zone.

The sensor provides:

  • Multi-beam infrared detection
  • Fast response time <5 ms
  • NPN NC output configuration
  • Machine protection applications

Product Compliance Documentation

DAPPRA DPR-0420-NPN-NC is supported by the following compliance documentation:

  • CE Certification
  • FCC Certification
  • RoHS Compliance

Area Sensor vs Single-Point Photoelectric Sensor

FeatureArea SensorSingle-Point Photoelectric Sensor
Detection methodMultiple infrared beamsSingle optical detection point
Detection areaMulti-beam areaSingle point
Beam quantityMultipleTypically one detection beam
Typical useArea detection and machine protectionObject presence / position detection
DPR SeriesYesNo

Area Sensor vs Safety Light Curtain

The terms Area Sensor and Safety Light Curtain can overlap in industrial applications, but they should not automatically be treated as identical technical classifications.

An Area Sensor generally describes a multi-beam photoelectric detection device.

A safety-rated light curtain is normally associated with specific functional-safety requirements and applicable safety standards.

For the DPR-0420-NPN-NC page, DAPPRA should therefore clearly describe the product as:

Industrial Area Sensor / Safety Light Curtain for Machine Protection

Market Terminology Note: Safety Light Curtain vs Area Sensor in Indonesia

In the Indonesian industrial automation market, products like the DAPPRA DPR-0420-NPN-NC are commonly referred to as either a "Safety Light Curtain" or an "Area Sensor", depending on the specific application and user terminology.

While these two terms are often used interchangeably to describe similar light-beam sensing products, they should not automatically be considered identical from a technical and safety standards perspective. The appropriate choice of terminology—and the product itself—depends on several key factors:

  • Required Safety Function: Does your application require personnel or equipment protection that meets a specific safety level, or is it for general object presence detection?
  • Detection Resolution: What is the smallest object size that needs to be detected? This directly relates to the optical axis pitch (e.g., 20 mm for this product).
  • Application Scenario: Is it for machine entrance safeguarding, or for object counting and positioning on a conveyor belt?
  • Output Configuration: Does your control system require an NPN or PNP output?
  • Applicable Safety Standards: Does the product possess the necessary safety certifications to support your safety claim?

For the DPR-0420-NPN-NC, it combines the multi-beam detection flexibility of an "Area Sensor" with the machine protection capabilities of a "Safety Light Curtain." Therefore, in the Indonesian market, it can be effectively positioned and applied as either a high-performance area sensor for automation control or as a reliable safety light curtain component for integration into machine protection systems.

Choosing the correct terminology helps ensure clear communication with suppliers, integrators, and end-users, ensuring the product is correctly applied to its intended scenario. For more details on specific applications, please refer to the Industrial Applications section above.

Parameter Dictionary

Optical Axis Pitch
The distance between adjacent optical detection beams.
DPR-0420-NPN-NC: 20 mm

Beam Quantity
The number of optical beams used to form the detection field.
DPR-0420-NPN-NC: 4 beams

Protection Height
The vertical detection height created by the optical beam arrangement.
DPR-0420-NPN-NC: 60 mm

Total Height (Housing)
The overall height of the sensor housing including end caps.
DPR-0420-NPN-NC: 126 mm

Detection Distance
The distance between the emitter and receiver within which the sensor operates.
DPR-0420-NPN-NC: 0.2–3 m

Response Time
The time required for the sensor to respond to a detected beam interruption.
DPR-0420-NPN-NC: <5 ms

NPN Output
A transistor output configuration used for connection to industrial control systems such as PLC inputs.

NC Signal Logic
Normally Closed signal logic. For the specified DPR-0420-NPN-NC configuration, normal beam transmission produces the specified 0V signal condition, while beam interruption removes the output.

DAPPRA Automation — Industrial Sensor Manufacturer

DAPPRA Automation is an industrial automation manufacturer and platform providing industrial control components, sensors, drives and supporting components for automation applications.

The DPR Series Industrial Area Sensor is manufactured by DAPPRA's own production facility, supporting consistent product quality control and customized production requirements.

OEM & ODM Services

DAPPRA provides OEM and ODM manufacturing services based on customer designs, specifications or samples.

OEM & ODM support includes:

  • Product customization
  • Manufacturing based on customer requirements
  • Customized industrial automation solutions

Global Service Markets

DAPPRA provides industrial automation products and OEM/ODM services for customers in:

  • Indonesia
  • Vietnam
  • Russia

Factory Production Capability

DAPPRA Automation factory production line manufacturing DPR Series industrial area sensors
DAPPRA Automation production facility supporting the manufacturing of DPR Series Industrial Area Sensors and industrial automation components.

Technical Resources

Download technical documents for the DAPPRA DPR-0420-NPN-NC Industrial Area Sensor, including datasheet, CAD drawing and installation guide.

DPR-0420-NPN-NC Datasheet

Technical specification document including product parameters, working principle, wiring information, dimensions, certifications and application details.

Download PDF →

DPR-0420-NPN-NC Installation Guide

Installation reference showing mounting methods, vertical installation, side installation and adjustable bracket installation.

Download Guide →

DPR-0420-NPN-NC CAD Drawing

Mechanical drawing resource for engineers, including product dimensions and installation reference for machine integration.

Download CAD →

Engineering FAQ

The following FAQ provides technical information about the DAPPRA DPR-0420-NPN-NC Industrial Area Sensor, including product specifications, output configuration, applications, environmental performance and certification information.

What is the DAPPRA DPR-0420-NPN-NC? +

The DAPPRA DPR-0420-NPN-NC is a DPR Series Industrial Area Sensor designed for machine protection and industrial automation applications.

Features: 4 beams, 20 mm pitch, 60 mm protection height, 126 mm total housing height, NPN NC output.

What is the SKU of the DPR-0420-NPN-NC? +

The SKU of the DPR-0420-NPN-NC is: SD69

What does DPR-0420-NPN-NC mean? +

DPR = DAPPRA DPR Series, 04 = 4 Optical Beams, 20 = 20 mm Optical Axis Pitch, NPN = NPN Output, NC = Normally Closed Signal Logic.

What is the detection distance of the DPR-0420-NPN-NC? +

The DPR-0420-NPN-NC has a detection distance of 0.2–3 m.

How many beams does the DPR-0420-NPN-NC have? +

The DPR-0420-NPN-NC uses: 4 infrared optical beams.

What is the optical axis pitch? +

The optical axis pitch is: 20 mm.

What is the protection height? +

The DPR-0420-NPN-NC provides: 60 mm protection height. Calculation: (4 - 1) × 20 mm = 60 mm.

What is the total height of the DPR-0420-NPN-NC housing? +

The total height of the sensor housing is 126 mm.

What is the detection method? +

The DPR-0420-NPN-NC uses: through-beam infrared detection.

What is the response time? +

The response time is: <5 ms.

What is the IP rating of the DPR-0420-NPN-NC? +

The DPR-0420-NPN-NC has an IP65 protection rating.

What is the operating temperature? +

The operating temperature range is -10°C to +55°C.

What output does the DPR-0420-NPN-NC use? +

The DPR-0420-NPN-NC uses: NPN NC output configuration.

What does NC mean? +

NC means Normally Closed. Normal beam condition = 0V output, beam interruption = no output.

What is the power supply? +

The power supply is: DC24V ±20%.

How should the DPR-0420-NPN-NC be wired? +

Refer to the official DAPPRA wiring diagram. Includes DC24V power, M12 connector, NPN NC output.

Can the DPR-0420-NPN-NC be connected to a PLC? +

Yes. The NPN NC output can be connected to compatible PLC input circuits.

Can the DPR-0420-NPN-NC be used in humid environments? +

Yes. Designed for high humidity, water, oil protection with IP65 rating.

Is the DPR-0420-NPN-NC resistant to oil? +

Yes. The DPR Series is designed for environments where oil contamination may occur.

Is the DPR-0420-NPN-NC resistant to vibration? +

Yes. It incorporates anti-vibration design for industrial machinery.

Is the DPR-0420-NPN-NC resistant to interference? +

Yes. Designed with interference-resistant capability.

Can the DPR-0420-NPN-NC be used on CNC machines? +

Yes. Suitable for CNC machine protection and detection applications.

Can it be used on press machines? +

Yes. Suitable for industrial press and hydraulic machine applications.

Can it be used on packaging machines? +

Yes. Suitable for automated packaging machinery requiring multi-beam detection.

Can it be used on conveyor systems? +

Yes. Can be integrated into conveyor automation systems.

Can it be used around industrial robots? +

Yes. For robot peripheral protection and workcell detection.

Where can the DPR-0420-NPN-NC be used? +

Industrial detection and machine protection: CNC, press, conveyors, packaging, production lines.

What certifications are available? +

CE, FCC, RoHS.

How do I choose the right DPR Series area sensor? +

Select based on beam quantity, optical axis pitch, protection height, output type, and sensing distance. DPR-0420-NPN-NC offers 4 beams, 20 mm pitch, 60 mm protection height, NPN NC output.

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2 ulasan untuk DAPPRA DPR-0420-NPN-NC Safety Light Curtain Industrial Area Sensor

  1. Ahma* (pemilik terverifikasi) –

    mantap jos banget…..

    Membantu 0 0
  2. Hadi*** (pemilik terverifikasi) –

    Trimakasih, rekomended buat belanja ditoko ini

    Membantu 0 0

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