DAPPRA DPR-2020-NPN-NC Safety Light Curtain Area Sensor
Rp1,750,000.00
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DAPPRA DPR-2020-NPN-NC is a 20-beam industrial safety light curtain area sensor with 20 mm optical axis pitch and 380 mm protection height. Through-beam infrared detection, NPN NC output, 0.1–3 m detection distance, ideal for machine protection, access monitoring, and industrial automation applications.
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DAPPRA DPR-2020-NPN-NC Safety Light Curtain Area Sensor
Product Overview
DPR-2020-NPN-NC is a DAPPRA DPR Series safety light curtain area sensor designed for industrial machine protection, hazardous area detection, and automation equipment access monitoring applications.
The sensor uses through-beam infrared detection technology with an emitter and receiver structure to create a protected sensing field.
With 20 infrared beams, 20mm optical axis pitch, 380mm protection height, and NPN NC output configuration, DPR-2020-NPN-NC provides a flexible industrial sensing solution for equipment requiring accurate beam interruption detection and reliable signal communication.
Key Product Specifications
| Parameter | Specification |
|---|---|
| Model | DPR-2020-NPN-NC |
| SKU | SH61 |
| Product Type | Safety Light Curtain Area Sensor |
| Detection Method | Through-beam Infrared Detection |
| Beam Quantity | 20 Beams |
| Optical Axis Pitch | 20 mm |
| Protection Height | 380 mm |
| Total Height | 459 mm |
| Resolution | 20 mm |
| Detection Distance | 0.1–3 m |
| Response Time | 0.5 ms |
| Output Type | NPN |
| Signal Logic | NC |
| Protection Rating | IP65 |
| Operating Voltage | DC 12–24V |
| Cable Length | 2 m |
| Product Series | DAPPRA DPR Series |
What Is a Safety Light Curtain?
A safety light curtain is an electro-optical sensing device that creates a protective detection field using infrared beams between an emitter and receiver.
When an object or human body interrupts the infrared beam field, the receiver detects the change and generates an output signal for the connected control system.
Unlike standard photoelectric sensors that are mainly used for object detection, safety light curtains are commonly used in machine protection and industrial safety applications where monitoring access areas and detecting intrusion are required.
Main Components of a Safety Light Curtain
| Component | Function |
|---|---|
| Emitter | Generates infrared beams toward the receiver |
| Receiver | Detects interrupted infrared beams |
| Optical Axis | Defines beam spacing and detection resolution |
| Output Interface | Transfers detection signals to control systems |
The DAPPRA DPR-2020-NPN-NC integrates these components into a compact safety light curtain area sensor designed for industrial automation applications.
How Does DPR-2020-NPN-NC Safety Light Curtain Work?
The DPR-2020-NPN-NC safety light curtain operates through infrared beam interruption detection.
The working process:
↓
Infrared Beam Transmission
↓
Protected Detection Field
↓
Receiver
↓
NPN NC Output Signal
↓
Machine Control System
The emitter continuously sends multiple infrared beams toward the receiver.
When an object enters the protected sensing area and interrupts one or more beams, the receiver detects the interruption and changes the output signal according to the NPN NC configuration.
This allows industrial equipment to monitor access areas and detect unexpected intrusion within the sensing field.
DPR-2020-NPN-NC Key Features
| Feature | Description |
|---|---|
| Through Beam Infrared Detection | Separate emitter and receiver structure using infrared beam detection. |
| Parallel Beam Configuration | Multiple parallel infrared beams create a defined detection area. |
| 20 mm Resolution | Supports detection requirements with 20 mm resolution specification. |
| NPN NC Output | Normally Closed NPN signal configuration for industrial control systems. |
| DC24V Operation | Designed for common industrial control voltage systems. |
| Wire Synchronization | Uses wire synchronization technology between emitter and receiver. |
| Dual-Circuit Signal Output | Provides self-test technology through dual-circuit signal output design. |
| IP65 Protection | Suitable for industrial environments requiring protection against dust and water exposure. |
| Oil Resistant Surface | Uses fluorosilicone surface coating for oil resistance. |
Understanding DPR-2020-NPN-NC Model Number
The DPR-2020-NPN-NC model code identifies the key configuration parameters of the DAPPRA DPR Series Area Sensor.
| Code | Meaning |
|---|---|
| DPR | DAPPRA DPR Series |
| 20 | 20 Optical Beams |
| 20 | 20 mm Optical Axis Pitch |
| NPN | NPN Output Type |
| NC | Normally Closed Signal Logic |
The complete model identification:
DPR-2020-NPN-NC
represents a DPR Series Area Sensor with 20 beams, 20 mm optical axis pitch, NPN output and Normally Closed signal logic.
DPR-2020-NPN-NC NPN NC Signal Logic
The DPR-2020-NPN-NC uses an NPN output with NC (Normally Closed) signal logic.
The signal output behavior changes according to the infrared beam detection status.
| Detection Condition | Output Status |
|---|---|
| Normal beam condition: | Output follows NC signal logic. |
| Beam interruption: | Output changes according to NC switching state. |
The NPN NC configuration allows the sensor to interface with industrial control systems requiring Normally Closed signal logic.
NPN NC Output Configuration
- Output Type: NPN
- Signal Logic: NC (Normally Closed)
- Power Supply: DC24V
- Connector: M12 Cable
How to Select a Safety Light Curtain?
Selecting a safety light curtain requires considering the required detection area, protection height, optical axis pitch, detection distance, resolution, output configuration and installation requirements.
1. Determine Protection Height
Protection height defines the effective height of the infrared detection area.
The DPR-2020-NPN-NC provides a 380 mm protection height.
2. Select Optical Axis Pitch
Optical axis pitch determines the spacing between adjacent infrared beam centers.
The DPR-2020-NPN-NC uses a 20 mm optical axis pitch.
3. Determine Detection Distance
The required distance between the emitter and receiver should be within the specified detection distance.
The DPR-2020-NPN-NC has a detection distance of 0.1–3 m.
4. Check Resolution
Resolution defines the specified detection capability of the sensor.
The DPR-2020-NPN-NC has 10 mm resolution.
5. Select Output Type
The DPR Series includes NPN and PNP output configurations.
The DPR-2020-NPN-NC uses NPN output.
6. Select Signal Logic
The DPR Series supports different signal logic configurations.
The DPR-2020-NPN-NC uses NC (Normally Closed) signal logic.
7. Confirm Operating Voltage
The DPR-2020-NPN-NC operates at DC 12–24V.
8. Confirm Installation Requirements
Select the appropriate mounting configuration according to the machine structure and available installation space.
The DPR Series supports top and bottom mounting, side mounting and cantilever mounting.
How to Choose a DPR Series Model?
DAPPRA DPR Series models can be selected according to the required optical beam quantity, optical axis pitch, protection height, output type and signal logic.
For DPR Series selection, engineers should first determine the required protection height and optical axis pitch, then confirm the required output configuration and signal logic.
The DPR-2020-NPN-NC provides:
- 20 optical beams
- 20 mm optical axis pitch
- 380 mm protection height
- 10 mm resolution
- NPN output
- NC signal logic
The DPR Series Model Selection Table provides a direct comparison of available configurations.
DPR Series Safety Light Curtain Comparison
The DAPPRA DPR Series provides different beam quantities, optical axis pitches, and protection heights to match different industrial detection requirements.
| Model | Beam Quantity | Optical Axis Pitch | Protection Height |
|---|---|---|---|
| DPR-1040-NPN-NC | 10 Beams | 40 mm | 360 mm |
| DPR-2020-NPN-NC | 20 Beams | 20 mm | 380 mm |
| DPR-1640-NPN-NC | 16 Beams | 40 mm | 640 mm |
DPR-2020-NPN-NC Installation Methods
The DPR-2020-NPN-NC can be installed according to different machine structures and protection requirements.
The DPR Series supports three installation configurations:
| Installation Method | Description |
|---|---|
| L1 Top & Bottom Installation | Standard installation method using top and bottom mounting brackets. |
| L2 Side Installation | Side-mounted installation option for different machine structures. |
| Cantilever Installation | Multi-directional adjustable bracket installation option. |
Mounting Accessories
The standard and optional mounting accessories include different bracket configurations for flexible industrial installation.
- Top and bottom mounting brackets
- Side mounting brackets
- Cantilever mounting brackets
- Mounting screws and hardware
DPR-2020-NPN-NC Dimension Information
The DPR-2020-NPN-NC is designed with a compact industrial housing structure suitable for integration into automation equipment.
| Dimension Parameter | Value |
|---|---|
| Protection Height | 380 mm |
| Total Height | 459 mm |
| Cross Section | 29 × 30 mm |
| A1 | 9 mm |
| A2 | 12 mm |
| B1 | 20 mm |
| B2 | 47 mm |
| A3 | 33 mm |
DPR-2020-NPN-NC Safety Light Curtain Wiring
The DPR-2020-NPN-NC uses an M12 3-pin connector for the emitter and an M12 4-pin connector for the receiver.
Emitter Wiring
| Pin | Wire Color | Function |
|---|---|---|
| Pin 1 | Brown | DC24V |
| Pin 2 | Blue | 0V |
| Pin 3 | Black | PC SYNC |
Receiver Wiring
| Pin | Wire Color | Function |
|---|---|---|
| Pin 1 | Brown | DC24V |
| Pin 2 | Blue | 0V |
| Pin 3 | White | NPN NC Output |
| Pin 4 | Black | PC SYNC |
PC SYNC Connection
Emitter Black → Receiver Black
The PC SYNC wiring between the emitter and receiver must be connected according to the wiring diagram.
NPN NC Output Logic
- Beam Clear → Output ON
- Beam Interrupted → Output OFF
DPR-2020-NPN-NC Technical Downloads
DPR-2020-NPN-NC Datasheet
Download includes: Product specifications, Technical parameters, Dimensions, Electrical information.
DPR-2020-NPN-NC Dimension & Installation Guide
Download includes: Installation instructions, Mounting information, Alignment guide.
DPR-2020-NPN-NC CAD Drawing
Download includes: Wiring information, Output configuration, Connection reference.
DPR-2020-NPN-NC Industrial Applications
CNC Machine Protection
Safety light curtains are commonly used around CNC machines to monitor access into hazardous machining areas.
DPR-2020-NPN-NC provides infrared beam detection for industrial equipment requiring access monitoring.
Press Machine Protection
Industrial presses require controlled operating areas due to moving mechanical components.
Safety light curtains can be applied around press equipment for intrusion detection.
Automated Production Equipment
Industrial automation equipment requires reliable sensing solutions for monitoring operating areas.
DPR Series safety light curtains provide flexible infrared detection for automated systems.
Industrial Environment Performance
Designed for Demanding Automation Environments
The DPR-2020-NPN-NC is designed for industrial automation environments where equipment may experience humidity, water exposure, oil contamination, mechanical vibration and electromagnetic interference.
Environmental Protection Features
| Feature | Description |
|---|---|
| IP65 Protection | Protection design for industrial environments requiring resistance to dust and water exposure. |
| Oil Resistance | Surface protection using fluorosilicone coating for oil-resistant performance. |
| Anti-Vibration Design | Designed for stable operation in industrial machinery environments. |
| Anti-Interference Design | Uses wire synchronization technology to improve resistance against electromagnetic interference. |
| Ambient Light Resistance | 10000 Lux (incident angle >5°) |
| Operating Temperature | -10°C to 55°C |
| Operating Humidity | Relative humidity <85% at 20°C |
DPR-2020-NPN-NC Safety Certification and Compliance
The DPR-2020-NPN-NC is supported by functional safety and product compliance documentation.
SIL 2 Functional Safety Certification
The DPR-2020-NPN-NC is supported by SIL 2 Functional Safety documentation according to IEC 61508 requirements.
| Safety Parameter | Specification |
|---|---|
| Safety Level | SIL 2 |
| Applicable Standard | IEC 61508 |
| Certification Type | Third-Party Functional Safety Certification |
Product Compliance Documentation
- SIL 2 Functional Safety Certificate
- CE Certification
- FCC Certification
- RoHS Compliance
DAPPRA Automation Manufacturing and Quality Assurance
The DPR Series is produced by DAPPRA Automation's own manufacturing facility.
DAPPRA provides industrial automation products with production control and quality inspection processes.
Quality Assurance Process
- Factory Quality Control
- 100% Product Inspection
- Functional Testing
- Incoming Material Inspection
- Aging Test
- Final Inspection
DPR-2020-NPN-NC Standard Product Package
The DPR-2020-NPN-NC standard package includes the complete sensor system and required installation accessories for industrial installation.
| Package Item | Quantity / Description |
|---|---|
| Emitter | 1 unit |
| Receiver | 1 unit |
| Connecting Cables | 2 cables |
| Standard Mounting Accessories | Included |
The complete package allows installation of the emitter and receiver system for through-beam infrared detection applications.
Frequently Asked Questions
DPR-2020-NPN-NC is a DAPPRA DPR Series safety light curtain designed for industrial machine protection, access monitoring, and automation equipment detection applications.
It uses through-beam infrared detection technology with 20 infrared beams, 20mm optical axis pitch, 380mm protection height, and NPN NC output configuration.
The sensor provides a reliable infrared detection solution for industrial equipment requiring area monitoring and beam interruption detection.
A safety light curtain works by creating an infrared detection field between an emitter and receiver.
The emitter continuously sends multiple infrared beams to the receiver. When an object or person enters the protected area and interrupts one or more beams, the receiver detects the interruption and changes the output signal.
The output signal can then be connected to an industrial controller or machine control system for detection and monitoring.
Optical axis pitch refers to the distance between two adjacent infrared beams inside a safety light curtain.
For DPR-2020-NPN-NC, the optical axis pitch is 20mm, meaning the distance between each infrared beam is 20mm.
A smaller optical axis pitch generally provides finer detection resolution because the sensing field contains more closely spaced beams.
The DPR-2020-NPN-NC safety light curtain has a response time of 0.5ms.
The fast response time allows the sensor to quickly detect infrared beam interruption and provide a signal change for industrial automation applications.
The DPR-2020-NPN-NC operates with a DC 12–24V power supply.
The wide voltage range allows integration with common industrial control systems and automation equipment.
The standard cable length of DPR-2020-NPN-NC is 2 meters.
The sensor package includes connecting cables for emitter and receiver installation.
NPN NC output means the sensor uses an NPN normally closed signal configuration.
In this configuration, the output signal follows normally closed logic and changes when the infrared beam detection status changes.
The NPN NC output allows connection with compatible industrial controllers requiring NPN signal input.
Safety light curtains are commonly used in industrial applications where access monitoring and area detection are required.
Typical applications include:
- CNC machine protection
- Press machine protection
- Automated production equipment
- Industrial automation systems
- Machine access monitoring
A safety light curtain and an area sensor both use optical detection technology, but their main applications are different.
A safety light curtain is mainly used for machine protection and monitoring access to hazardous areas.
An area sensor is generally used for object detection, counting, positioning, and automation control applications.
DPR-2020-NPN-NC is designed for industrial area detection and machine protection applications.
Protection height refers to the vertical sensing coverage area created between the emitter and receiver.
The DPR-2020-NPN-NC provides a 380mm protection height, defining the effective infrared detection area.
Beam quantity refers to the number of infrared beams generated by the safety light curtain.
The DPR-2020-NPN-NC uses 20 infrared beams to create multiple detection points across the protected sensing area.
The difference is the distance between adjacent infrared beams.
A 20mm optical axis pitch provides closer beam spacing and generally supports finer detection resolution.
A 40mm optical axis pitch provides wider beam spacing and is commonly used for applications requiring general area detection.
The correct selection depends on the required detection resolution and application requirements.
Yes.
The standard DPR-2020-NPN-NC package includes:
- 1 × Emitter
- 1 × Receiver
- Connecting cables
- Standard mounting accessories
The complete sensor system is ready for industrial installation.
The standard package includes:
| Package Item | Quantity |
|---|---|
| Emitter | 1 unit |
| Receiver | 1 unit |
| Connecting Cables | 2 cables |
| Standard Mounting Accessories | Included |
The installation process includes:
- Mount the emitter and receiver opposite each other.
- Align the infrared beams between both units.
- Fix the sensor position using mounting brackets.
- Connect the power supply and output wiring.
- Test beam interruption detection before operation.
Correct alignment between emitter and receiver is important for stable detection performance.
Select a DPR Series safety light curtain according to the following parameters:
- Optical axis pitch
- Protection height
- Beam quantity
- Detection distance
- Output type
- Signal logic
For applications requiring finer detection resolution, a smaller optical axis pitch such as 20mm may be preferred.
The main difference is the beam configuration and optical axis pitch.
| Model | Beam Quantity | Optical Axis Pitch | Protection Height |
|---|---|---|---|
| DPR-1040-NPN-NC | 10 Beams | 40mm | 360mm |
| DPR-2020-NPN-NC | 20 Beams | 20mm | 380mm |
DPR-2020-NPN-NC provides more beams and smaller optical axis pitch for applications requiring finer detection capability.
DPR-2020-NPN-NC can be used as an alternative solution for applications requiring a 20-beam area sensor with 20mm optical axis pitch and NPN output configuration.
It features:
- 20 infrared beams
- 20mm optical axis pitch
- 380mm protection height
- NPN NC output
Before replacement, users should confirm key specifications including beam quantity, optical axis pitch, output type, wiring configuration, and mechanical installation requirements.
Technical documents available for DPR-2020-NPN-NC include:
- Product Datasheet
- Installation Manual
- Wiring Diagram
- Dimension Drawing
These documents provide technical specifications, installation instructions, electrical connections, and mechanical information.
DPR-2020-NPN-NC uses an NPN NC output wiring configuration.
The wiring connection includes:
- Power supply connection
- Emitter and receiver synchronization connection
- NPN output signal connection
Refer to the DPR-2020-NPN-NC wiring diagram for detailed pin assignment and connection information.
Why Choose DAPPRA DPR Series Safety Light Curtain?
DAPPRA provides industrial automation components with detailed product specifications, configuration information, and application-focused technical documentation.
The DPR Series safety light curtain area sensors provide multiple configurations to support different industrial sensing requirements, including different beam quantities, optical axis pitches, protection heights, and output options.
Need Technical Support or a Quote?
Contact DAPPRA Automation for engineering assistance, pricing, or OEM/ODM inquiries.
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DAPPRA DPR-2020-NPN-NC Safety Light Curtain Area Sensor
Product Overview
DPR-2020-NPN-NC is a DAPPRA DPR Series safety light curtain area sensor designed for industrial machine protection, hazardous area detection, and automation equipment access monitoring applications.
The sensor uses through-beam infrared detection technology with an emitter and receiver structure to create a protected sensing field.
With 20 infrared beams, 20mm optical axis pitch, 380mm protection height, and NPN NC output configuration, DPR-2020-NPN-NC provides a flexible industrial sensing solution for equipment requiring accurate beam interruption detection and reliable signal communication.
Key Product Specifications
| Parameter | Specification |
|---|---|
| Model | DPR-2020-NPN-NC |
| SKU | SH61 |
| Product Type | Safety Light Curtain Area Sensor |
| Detection Method | Through-beam Infrared Detection |
| Beam Quantity | 20 Beams |
| Optical Axis Pitch | 20 mm |
| Protection Height | 380 mm |
| Total Height | 459 mm |
| Resolution | 20 mm |
| Detection Distance | 0.1–3 m |
| Response Time | 0.5 ms |
| Output Type | NPN |
| Signal Logic | NC |
| Protection Rating | IP65 |
| Operating Voltage | DC 12–24V |
| Cable Length | 2 m |
| Product Series | DAPPRA DPR Series |
What Is a Safety Light Curtain?
A safety light curtain is an electro-optical sensing device that creates a protective detection field using infrared beams between an emitter and receiver.
When an object or human body interrupts the infrared beam field, the receiver detects the change and generates an output signal for the connected control system.
Unlike standard photoelectric sensors that are mainly used for object detection, safety light curtains are commonly used in machine protection and industrial safety applications where monitoring access areas and detecting intrusion are required.
Main Components of a Safety Light Curtain
| Component | Function |
|---|---|
| Emitter | Generates infrared beams toward the receiver |
| Receiver | Detects interrupted infrared beams |
| Optical Axis | Defines beam spacing and detection resolution |
| Output Interface | Transfers detection signals to control systems |
The DAPPRA DPR-2020-NPN-NC integrates these components into a compact safety light curtain area sensor designed for industrial automation applications.
How Does DPR-2020-NPN-NC Safety Light Curtain Work?
The DPR-2020-NPN-NC safety light curtain operates through infrared beam interruption detection.
The working process:
↓
Infrared Beam Transmission
↓
Protected Detection Field
↓
Receiver
↓
NPN NC Output Signal
↓
Machine Control System
The emitter continuously sends multiple infrared beams toward the receiver.
When an object enters the protected sensing area and interrupts one or more beams, the receiver detects the interruption and changes the output signal according to the NPN NC configuration.
This allows industrial equipment to monitor access areas and detect unexpected intrusion within the sensing field.
DPR-2020-NPN-NC Key Features
| Feature | Description |
|---|---|
| Through Beam Infrared Detection | Separate emitter and receiver structure using infrared beam detection. |
| Parallel Beam Configuration | Multiple parallel infrared beams create a defined detection area. |
| 20 mm Resolution | Supports detection requirements with 20 mm resolution specification. |
| NPN NC Output | Normally Closed NPN signal configuration for industrial control systems. |
| DC24V Operation | Designed for common industrial control voltage systems. |
| Wire Synchronization | Uses wire synchronization technology between emitter and receiver. |
| Dual-Circuit Signal Output | Provides self-test technology through dual-circuit signal output design. |
| IP65 Protection | Suitable for industrial environments requiring protection against dust and water exposure. |
| Oil Resistant Surface | Uses fluorosilicone surface coating for oil resistance. |
Understanding DPR-2020-NPN-NC Model Number
The DPR-2020-NPN-NC model code identifies the key configuration parameters of the DAPPRA DPR Series Area Sensor.
| Code | Meaning |
|---|---|
| DPR | DAPPRA DPR Series |
| 20 | 20 Optical Beams |
| 20 | 20 mm Optical Axis Pitch |
| NPN | NPN Output Type |
| NC | Normally Closed Signal Logic |
The complete model identification:
DPR-2020-NPN-NC
represents a DPR Series Area Sensor with 20 beams, 20 mm optical axis pitch, NPN output and Normally Closed signal logic.
DPR-2020-NPN-NC NPN NC Signal Logic
The DPR-2020-NPN-NC uses an NPN output with NC (Normally Closed) signal logic.
The signal output behavior changes according to the infrared beam detection status.
| Detection Condition | Output Status |
|---|---|
| Normal beam condition: | Output follows NC signal logic. |
| Beam interruption: | Output changes according to NC switching state. |
The NPN NC configuration allows the sensor to interface with industrial control systems requiring Normally Closed signal logic.
NPN NC Output Configuration
- Output Type: NPN
- Signal Logic: NC (Normally Closed)
- Power Supply: DC24V
- Connector: M12 Cable
How to Select a Safety Light Curtain?
Selecting a safety light curtain requires considering the required detection area, protection height, optical axis pitch, detection distance, resolution, output configuration and installation requirements.
1. Determine Protection Height
Protection height defines the effective height of the infrared detection area.
The DPR-2020-NPN-NC provides a 380 mm protection height.
2. Select Optical Axis Pitch
Optical axis pitch determines the spacing between adjacent infrared beam centers.
The DPR-2020-NPN-NC uses a 20 mm optical axis pitch.
3. Determine Detection Distance
The required distance between the emitter and receiver should be within the specified detection distance.
The DPR-2020-NPN-NC has a detection distance of 0.1–3 m.
4. Check Resolution
Resolution defines the specified detection capability of the sensor.
The DPR-2020-NPN-NC has 10 mm resolution.
5. Select Output Type
The DPR Series includes NPN and PNP output configurations.
The DPR-2020-NPN-NC uses NPN output.
6. Select Signal Logic
The DPR Series supports different signal logic configurations.
The DPR-2020-NPN-NC uses NC (Normally Closed) signal logic.
7. Confirm Operating Voltage
The DPR-2020-NPN-NC operates at DC 12–24V.
8. Confirm Installation Requirements
Select the appropriate mounting configuration according to the machine structure and available installation space.
The DPR Series supports top and bottom mounting, side mounting and cantilever mounting.
How to Choose a DPR Series Model?
DAPPRA DPR Series models can be selected according to the required optical beam quantity, optical axis pitch, protection height, output type and signal logic.
For DPR Series selection, engineers should first determine the required protection height and optical axis pitch, then confirm the required output configuration and signal logic.
The DPR-2020-NPN-NC provides:
- 20 optical beams
- 20 mm optical axis pitch
- 380 mm protection height
- 10 mm resolution
- NPN output
- NC signal logic
The DPR Series Model Selection Table provides a direct comparison of available configurations.
DPR Series Safety Light Curtain Comparison
The DAPPRA DPR Series provides different beam quantities, optical axis pitches, and protection heights to match different industrial detection requirements.
| Model | Beam Quantity | Optical Axis Pitch | Protection Height |
|---|---|---|---|
| DPR-1040-NPN-NC | 10 Beams | 40 mm | 360 mm |
| DPR-2020-NPN-NC | 20 Beams | 20 mm | 380 mm |
| DPR-1640-NPN-NC | 16 Beams | 40 mm | 640 mm |
DPR-2020-NPN-NC Installation Methods
The DPR-2020-NPN-NC can be installed according to different machine structures and protection requirements.
The DPR Series supports three installation configurations:
| Installation Method | Description |
|---|---|
| L1 Top & Bottom Installation | Standard installation method using top and bottom mounting brackets. |
| L2 Side Installation | Side-mounted installation option for different machine structures. |
| Cantilever Installation | Multi-directional adjustable bracket installation option. |
Mounting Accessories
The standard and optional mounting accessories include different bracket configurations for flexible industrial installation.
- Top and bottom mounting brackets
- Side mounting brackets
- Cantilever mounting brackets
- Mounting screws and hardware
DPR-2020-NPN-NC Dimension Information
The DPR-2020-NPN-NC is designed with a compact industrial housing structure suitable for integration into automation equipment.
| Dimension Parameter | Value |
|---|---|
| Protection Height | 380 mm |
| Total Height | 459 mm |
| Cross Section | 29 × 30 mm |
| A1 | 9 mm |
| A2 | 12 mm |
| B1 | 20 mm |
| B2 | 47 mm |
| A3 | 33 mm |
DPR-2020-NPN-NC Safety Light Curtain Wiring
The DPR-2020-NPN-NC uses an M12 3-pin connector for the emitter and an M12 4-pin connector for the receiver.
Emitter Wiring
| Pin | Wire Color | Function |
|---|---|---|
| Pin 1 | Brown | DC24V |
| Pin 2 | Blue | 0V |
| Pin 3 | Black | PC SYNC |
Receiver Wiring
| Pin | Wire Color | Function |
|---|---|---|
| Pin 1 | Brown | DC24V |
| Pin 2 | Blue | 0V |
| Pin 3 | White | NPN NC Output |
| Pin 4 | Black | PC SYNC |
PC SYNC Connection
Emitter Black → Receiver Black
The PC SYNC wiring between the emitter and receiver must be connected according to the wiring diagram.
NPN NC Output Logic
- Beam Clear → Output ON
- Beam Interrupted → Output OFF
DPR-2020-NPN-NC Technical Downloads
DPR-2020-NPN-NC Datasheet
Download includes: Product specifications, Technical parameters, Dimensions, Electrical information.
DPR-2020-NPN-NC Dimension & Installation Guide
Download includes: Installation instructions, Mounting information, Alignment guide.
DPR-2020-NPN-NC CAD Drawing
Download includes: Wiring information, Output configuration, Connection reference.
DPR-2020-NPN-NC Industrial Applications
CNC Machine Protection
Safety light curtains are commonly used around CNC machines to monitor access into hazardous machining areas.
DPR-2020-NPN-NC provides infrared beam detection for industrial equipment requiring access monitoring.
Press Machine Protection
Industrial presses require controlled operating areas due to moving mechanical components.
Safety light curtains can be applied around press equipment for intrusion detection.
Automated Production Equipment
Industrial automation equipment requires reliable sensing solutions for monitoring operating areas.
DPR Series safety light curtains provide flexible infrared detection for automated systems.
Industrial Environment Performance
Designed for Demanding Automation Environments
The DPR-2020-NPN-NC is designed for industrial automation environments where equipment may experience humidity, water exposure, oil contamination, mechanical vibration and electromagnetic interference.
Environmental Protection Features
| Feature | Description |
|---|---|
| IP65 Protection | Protection design for industrial environments requiring resistance to dust and water exposure. |
| Oil Resistance | Surface protection using fluorosilicone coating for oil-resistant performance. |
| Anti-Vibration Design | Designed for stable operation in industrial machinery environments. |
| Anti-Interference Design | Uses wire synchronization technology to improve resistance against electromagnetic interference. |
| Ambient Light Resistance | 10000 Lux (incident angle >5°) |
| Operating Temperature | -10°C to 55°C |
| Operating Humidity | Relative humidity <85% at 20°C |
DPR-2020-NPN-NC Safety Certification and Compliance
The DPR-2020-NPN-NC is supported by functional safety and product compliance documentation.
SIL 2 Functional Safety Certification
The DPR-2020-NPN-NC is supported by SIL 2 Functional Safety documentation according to IEC 61508 requirements.
| Safety Parameter | Specification |
|---|---|
| Safety Level | SIL 2 |
| Applicable Standard | IEC 61508 |
| Certification Type | Third-Party Functional Safety Certification |
Product Compliance Documentation
- SIL 2 Functional Safety Certificate
- CE Certification
- FCC Certification
- RoHS Compliance
DAPPRA Automation Manufacturing and Quality Assurance
The DPR Series is produced by DAPPRA Automation's own manufacturing facility.
DAPPRA provides industrial automation products with production control and quality inspection processes.
Quality Assurance Process
- Factory Quality Control
- 100% Product Inspection
- Functional Testing
- Incoming Material Inspection
- Aging Test
- Final Inspection
DPR-2020-NPN-NC Standard Product Package
The DPR-2020-NPN-NC standard package includes the complete sensor system and required installation accessories for industrial installation.
| Package Item | Quantity / Description |
|---|---|
| Emitter | 1 unit |
| Receiver | 1 unit |
| Connecting Cables | 2 cables |
| Standard Mounting Accessories | Included |
The complete package allows installation of the emitter and receiver system for through-beam infrared detection applications.
Frequently Asked Questions
DPR-2020-NPN-NC is a DAPPRA DPR Series safety light curtain designed for industrial machine protection, access monitoring, and automation equipment detection applications.
It uses through-beam infrared detection technology with 20 infrared beams, 20mm optical axis pitch, 380mm protection height, and NPN NC output configuration.
The sensor provides a reliable infrared detection solution for industrial equipment requiring area monitoring and beam interruption detection.
A safety light curtain works by creating an infrared detection field between an emitter and receiver.
The emitter continuously sends multiple infrared beams to the receiver. When an object or person enters the protected area and interrupts one or more beams, the receiver detects the interruption and changes the output signal.
The output signal can then be connected to an industrial controller or machine control system for detection and monitoring.
Optical axis pitch refers to the distance between two adjacent infrared beams inside a safety light curtain.
For DPR-2020-NPN-NC, the optical axis pitch is 20mm, meaning the distance between each infrared beam is 20mm.
A smaller optical axis pitch generally provides finer detection resolution because the sensing field contains more closely spaced beams.
The DPR-2020-NPN-NC safety light curtain has a response time of 0.5ms.
The fast response time allows the sensor to quickly detect infrared beam interruption and provide a signal change for industrial automation applications.
The DPR-2020-NPN-NC operates with a DC 12–24V power supply.
The wide voltage range allows integration with common industrial control systems and automation equipment.
The standard cable length of DPR-2020-NPN-NC is 2 meters.
The sensor package includes connecting cables for emitter and receiver installation.
NPN NC output means the sensor uses an NPN normally closed signal configuration.
In this configuration, the output signal follows normally closed logic and changes when the infrared beam detection status changes.
The NPN NC output allows connection with compatible industrial controllers requiring NPN signal input.
Safety light curtains are commonly used in industrial applications where access monitoring and area detection are required.
Typical applications include:
- CNC machine protection
- Press machine protection
- Automated production equipment
- Industrial automation systems
- Machine access monitoring
A safety light curtain and an area sensor both use optical detection technology, but their main applications are different.
A safety light curtain is mainly used for machine protection and monitoring access to hazardous areas.
An area sensor is generally used for object detection, counting, positioning, and automation control applications.
DPR-2020-NPN-NC is designed for industrial area detection and machine protection applications.
Protection height refers to the vertical sensing coverage area created between the emitter and receiver.
The DPR-2020-NPN-NC provides a 380mm protection height, defining the effective infrared detection area.
Beam quantity refers to the number of infrared beams generated by the safety light curtain.
The DPR-2020-NPN-NC uses 20 infrared beams to create multiple detection points across the protected sensing area.
The difference is the distance between adjacent infrared beams.
A 20mm optical axis pitch provides closer beam spacing and generally supports finer detection resolution.
A 40mm optical axis pitch provides wider beam spacing and is commonly used for applications requiring general area detection.
The correct selection depends on the required detection resolution and application requirements.
Yes.
The standard DPR-2020-NPN-NC package includes:
- 1 × Emitter
- 1 × Receiver
- Connecting cables
- Standard mounting accessories
The complete sensor system is ready for industrial installation.
The standard package includes:
| Package Item | Quantity |
|---|---|
| Emitter | 1 unit |
| Receiver | 1 unit |
| Connecting Cables | 2 cables |
| Standard Mounting Accessories | Included |
The installation process includes:
- Mount the emitter and receiver opposite each other.
- Align the infrared beams between both units.
- Fix the sensor position using mounting brackets.
- Connect the power supply and output wiring.
- Test beam interruption detection before operation.
Correct alignment between emitter and receiver is important for stable detection performance.
Select a DPR Series safety light curtain according to the following parameters:
- Optical axis pitch
- Protection height
- Beam quantity
- Detection distance
- Output type
- Signal logic
For applications requiring finer detection resolution, a smaller optical axis pitch such as 20mm may be preferred.
The main difference is the beam configuration and optical axis pitch.
| Model | Beam Quantity | Optical Axis Pitch | Protection Height |
|---|---|---|---|
| DPR-1040-NPN-NC | 10 Beams | 40mm | 360mm |
| DPR-2020-NPN-NC | 20 Beams | 20mm | 380mm |
DPR-2020-NPN-NC provides more beams and smaller optical axis pitch for applications requiring finer detection capability.
DPR-2020-NPN-NC can be used as an alternative solution for applications requiring a 20-beam area sensor with 20mm optical axis pitch and NPN output configuration.
It features:
- 20 infrared beams
- 20mm optical axis pitch
- 380mm protection height
- NPN NC output
Before replacement, users should confirm key specifications including beam quantity, optical axis pitch, output type, wiring configuration, and mechanical installation requirements.
Technical documents available for DPR-2020-NPN-NC include:
- Product Datasheet
- Installation Manual
- Wiring Diagram
- Dimension Drawing
These documents provide technical specifications, installation instructions, electrical connections, and mechanical information.
DPR-2020-NPN-NC uses an NPN NC output wiring configuration.
The wiring connection includes:
- Power supply connection
- Emitter and receiver synchronization connection
- NPN output signal connection
Refer to the DPR-2020-NPN-NC wiring diagram for detailed pin assignment and connection information.
Why Choose DAPPRA DPR Series Safety Light Curtain?
DAPPRA provides industrial automation components with detailed product specifications, configuration information, and application-focused technical documentation.
The DPR Series safety light curtain area sensors provide multiple configurations to support different industrial sensing requirements, including different beam quantities, optical axis pitches, protection heights, and output options.
Need Technical Support or a Quote?
Contact DAPPRA Automation for engineering assistance, pricing, or OEM/ODM inquiries.
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