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DPR-2440-NPN-NC Industrial Area Sensor Safety Light Curtain
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DAPPRA DPR-2440-NPN-NC is a 24-beam DPR Series Industrial Area Sensor and Safety Light Curtain with 40 mm optical axis pitch and 920 mm protection height. Multiple parallel beam through-beam detection, NPN NC output, IP65 protection, ideal for industrial object detection, machine protection and personnel protection applications.
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✦ Industrial Area Sensor
Safety Light Curtain
SIL 2 Certified
NPN NC
IP65
DPR-2440-NPN-NC
Industrial Area Sensor & Safety Light Curtain · 24‑Beam · 40 mm Pitch · 920 mm Protection Height
The DAPPRA DPR-2440-NPN-NC is a DPR Series Industrial Area Sensor and Safety Light Curtain for industrial object detection, machine protection and personnel protection applications.
The sensor uses Multiple Parallel Beam Through-Beam Detection Technology with a separate transmitter and receiver. Twenty-four optical beams are arranged at a 40 mm optical axis pitch, creating a 920 mm protection height.
In industrial automation, this product category may also be described as an Area Sensor, Light Curtain Sensor or Safety Light Curtain, depending on the application and required safety function.
Primary Product Classification: Industrial Area Sensor / Safety Light Curtain.
Related Industry Terminology: Area Sensor / Light Curtain Sensor / Safety Light Curtain.
Product Identity
DAPPRA DPR-2440-NPN-NC is a DAPPRA-branded Industrial Area Sensor and Safety Light Curtain and a specific model within the DAPPRA DPR Series.
The model provides 24 optical beams, a 40 mm optical axis pitch, a 920 mm protection height and a 1006 mm total height.
DAPPRA Automation designs, develops and manufactures the DPR Series for industrial automation and machine safety applications.
| Parameter | Specification |
|---|---|
| Brand | DAPPRA |
| Product Series | DPR Series |
| Model | DPR-2440-NPN-NC |
| SKU | SD74 |
| Product Type | Industrial Area Sensor / Safety Light Curtain |
| Detection Method | Multiple Parallel Beam Through-Beam Detection |
| Beam Quantity | 24 Optical Beams |
| Optical Axis Pitch | 40 mm |
| Protection Height | 920 mm |
| Total Height | 1006 mm |
| Housing Cross Section | 29 × 30 mm |
| Output Type | NPN |
| Signal Logic | NC (Normally Closed) |
| Protection Rating | IP65 |
| Safety Certification | SIL 2 / IEC 61508 |
| Compliance | CE / FCC / RoHS |
DPR-2440-NPN-NC at a Glance
The DPR-2440-NPN-NC is a 24-beam Industrial Area Sensor and Safety Light Curtain for applications requiring a tall multi-beam sensing and protection field.
- 24 optical beams — evenly distributed across the sensing field
- 40 mm optical axis pitch — consistent beam spacing
- 920 mm protection height — large vertical sensing and protection area
- 1006 mm total height — complete sensor housing height
- 29 × 30 mm housing cross section — compact industrial housing
- NPN transistor output — compatible with NPN control inputs
- Normally Closed (NC) signal logic
- 0.2–3 m detection distance
- <5 ms response time
- DC24V ±20% power supply
- IP65 protection — dust and water resistance
- Ambient light resistance up to 10000 Lux
- Operating temperature -10°C to +55°C
- SIL 2 according to IEC 61508
- CE / FCC / RoHS compliance
- Industrial environmental resistance
DAPPRA DPR Series
The DPR-2440-NPN-NC is one model within the DAPPRA DPR Series of Industrial Area Sensors and Safety Light Curtains.
The DPR Series uses Multiple Parallel Beam Through-Beam Detection Technology and provides different beam quantities, optical axis pitches and protection heights for industrial automation, object detection, machine protection and personnel protection applications.
How Does the DPR-2440-NPN-NC Work?
The DPR-2440-NPN-NC uses Multiple Parallel Beam Through-Beam Detection Technology. The transmitter and receiver are installed opposite each other, with multiple optical beams arranged vertically across the sensing field.
When an object or person enters the sensing field and interrupts one or more optical beams, the receiver detects the interruption and changes the output according to the configured NPN NC logic.
The 24-beam configuration provides a 920 mm protection height with a 40 mm optical axis pitch, creating a tall defined sensing and protection field.
Detection Process
- Infrared Beam Transmission — The transmitter generates 24 parallel infrared beams and sends them toward the receiver.
- Detection Field Creation — The 24 optical beams are arranged at a 40 mm optical axis pitch, creating a 920 mm protection height.
- Object or Personnel Detection — An object or person entering the sensing field interrupts one or more beams.
- Signal Output — The receiver processes the interruption and changes the output according to the DPR-2440-NPN-NC NPN NC configuration.
24‑Beam Detection Configuration
| Configuration Parameter | Value |
|---|---|
| Beam Quantity | 24 Beams |
| Optical Axis Pitch | 40 mm |
| Protection Height | 920 mm |
| Total Height | 1006 mm |
The protection height is determined by the beam arrangement: (24 − 1) × 40 mm = 920 mm. The 1006 mm dimension represents the complete sensor height.
Model Number Explanation
The model number identifies the DPR Series configuration, beam quantity, optical axis pitch, output type and signal logic.
| Model Code | Meaning | Description |
|---|---|---|
| DPR | Product Series | DAPPRA DPR Industrial Area Sensor Series |
| 24 | Beam Quantity | 24 optical beams |
| 40 | Optical Axis Pitch | 40 mm beam spacing |
| NPN | Output Type | NPN transistor output |
| NC | Signal Logic | Normally Closed |
DPR-2440-NPN-NC → 24 Beams · 40 mm Pitch · NPN · Normally Closed
Technical Specifications
| Parameter | DPR-2440-NPN-NC |
|---|---|
| Brand | DAPPRA |
| Series | DPR Series |
| Model | DPR-2440-NPN-NC |
| SKU | SD74 |
| Product Type | Industrial Area Sensor / Safety Light Curtain |
| Detection Method | Multiple Parallel Beam Through-Beam Detection |
| Beam Quantity | 24 Optical Beams |
| Optical Axis Pitch | 40 mm |
| Protection Height | 920 mm |
| Total Height | 1006 mm |
| Housing Size | 29 × 30 mm |
| Output Type | NPN |
| Signal Logic | NC (Normally Closed) |
| Supply Voltage | DC24V ±20% |
| Detection Distance | 0.2–3 m |
| Response Time | <5 ms |
| Protection Rating | IP65 |
| Ambient Light Resistance | Up to 10000 Lux |
| Operating Temperature | -10°C to +55°C |
| Humidity Resistance | Yes |
| Oil Protection | Yes |
| Anti-Vibration | Yes |
| Anti-Interference | Yes |
| Safety Standard | IEC 61508 |
| Safety Level | SIL 2 |
| Certifications / Compliance | CE / FCC / RoHS |
DPR Series Model Selection
The DPR Series provides different beam quantities, optical axis pitches and protection heights for different industrial detection and protection requirements.
| Model | Beams | Pitch | Protection Height | Total Height | Output | Logic |
|---|---|---|---|---|---|---|
| DPR-0440-NPN-NC | 4 | 40 mm | 120 mm | 206 mm | NPN | NC |
| DPR-0640-NPN-NC | 6 | 40 mm | 200 mm | 286 mm | NPN | NC |
| DPR-0840-NPN-NC | 8 | 40 mm | 280 mm | 366 mm | NPN | NC |
| DPR-1040-NPN-NC | 10 | 40 mm | 360 mm | 446 mm | NPN | NC |
| DPR-1240-PNP-NC | 12 | 40 mm | 440 mm | 526 mm | PNP | NC |
| DPR-1440-NPN-NC | 14 | 40 mm | 520 mm | 606 mm | NPN | NC |
| DPR-1640-NPN-NC | 16 | 40 mm | 600 mm | 686 mm | NPN | NC |
| DPR-2440-NPN-NC | 24 | 40 mm | 920 mm | 1006 mm | NPN | NC |
For model selection, engineers should first determine the required protection height and optical axis pitch, then confirm output configuration, signal logic, mounting dimensions and application requirements.
NPN NC Output & Wiring
The DPR-2440-NPN-NC uses an NPN transistor output with Normally Closed (NC) signal logic.
| Electrical Configuration | Specification |
|---|---|
| Supply Voltage | DC24V ±20% |
| Output Type | NPN |
| Signal Logic | NC (Normally Closed) |
| Control Interface | Suitable for compatible PLC and control-system inputs |
For the specified NC configuration, normal beam transmission produces a 0V output and beam interruption results in no output. The wiring should follow the DPR Series configuration and the electrical requirements of the connected control system.
Mechanical Dimensions
- 920 mm protection height
- 1006 mm total height
- 29 × 30 mm housing cross section
- 40 mm optical axis pitch
- 24 optical beams
The 920 mm dimension represents the active protection/detection height, while 1006 mm represents the complete sensor height. The mechanical drawing should be used for final mounting, enclosure and machine-design dimensions.
Installation Methods
The DPR-2440-NPN-NC can be installed using the available DAPPRA mounting configurations.
- Standard Mounting — Vertical transmitter/receiver configuration
- Side Mounting — Side-mounted installation for compact equipment
- Adjustable Mounting — Flexible positioning with adjustable brackets
For reliable multi-beam detection, the transmitter and receiver should be aligned across the complete 920 mm sensing height. The installation reference should be followed for mounting position, alignment and sensor spacing.
Industrial Applications
The DPR-2440-NPN-NC is suited to industrial automation applications requiring a large vertical multi-beam sensing field, object detection, machine protection or personnel protection.
- Machine area detection
- Machine entrance monitoring
- Conveyor and material flow monitoring
- Production-line sensing
- Automated equipment
- Packaging machinery
- Material handling equipment
- Machine protection
- Personnel protection around machinery
- Safety guarding applications
- Industrial automation systems
Application suitability depends on the required sensing function, machine risk assessment and applicable safety requirements.
Typical Users
The DPR-2440-NPN-NC is intended for industrial users and technical professionals such as:
- Industrial Automation Engineers
- Electrical Engineers
- Machine Builders
- OEM Manufacturers
- System Integrators
- Factory Maintenance Teams
- Automation Equipment Manufacturers
- Industrial Sensor Distributors
Industrial Environment Performance
The DPR-2440-NPN-NC is designed for industrial environments where reliable optical detection and environmental resistance are required.
- IP65 protection — Dust and water resistance for industrial environments
- Humidity resistance
- Oil protection
- Anti-vibration performance
- Anti-interference performance
- Ambient light resistance up to 10000 Lux
- Operating temperature -10°C to +55°C
These characteristics support deployment in a range of industrial automation environments.
Safety & Certification
The DPR-2440-NPN-NC is supported by safety and compliance documentation including:
- SIL 2 / IEC 61508 — Functional Safety Certification
- CE — Compliance
- FCC — Compliance
- RoHS — Environmental Compliance
The DPR-2440-NPN-NC is designed for both Industrial Area Sensor and Safety Light Curtain applications. It can be used for general area detection as well as safety-related machine protection and personnel protection applications.
The sensor is supported by SIL 2 certification according to IEC 61508 for safety-related applications. The appropriate safety configuration and integration should be determined according to the machine risk assessment and applicable safety requirements.
Industrial Area Sensor and Safety Light Curtain
The DAPPRA DPR-2440-NPN-NC combines multi-beam area detection with safety light curtain functionality for industrial applications.
As an Industrial Area Sensor, it detects objects across a large sensing area using 24 parallel beams.
As a Safety Light Curtain, it can be used to detect personnel entering a protected machine area and support personnel protection around machinery.
The 24-beam configuration, 40 mm optical axis pitch and 920 mm protection height provide a tall defined sensing and protection area for industrial automation and machine safety applications.
The appropriate safety configuration and integration should be determined according to the machine risk assessment and applicable safety requirements.
DAPPRA Product Development & Manufacturing
The DPR-2440-NPN-NC is a DAPPRA-developed and DAPPRA-branded Industrial Area Sensor and Safety Light Curtain.
DAPPRA Automation is responsible for the engineering development, product design and technical specification of the DPR Series and manufactures DAPPRA-branded products for industrial automation and machine safety applications.
The DPR Series is developed as part of DAPPRA's industrial automation product portfolio for applications involving machine sensing, object detection, personnel protection and industrial control.
Technical Application Note
The DAPPRA DPR-2440-NPN-NC is designed for engineers and industrial users requiring a 24-beam, 40 mm-pitch sensing and protection configuration with a 920 mm detection and protection height.
For machine integration, engineers should evaluate the required detection area, machine opening, mounting position, electrical interface, output logic, machine risk assessment and application-specific safety requirements before installation.
Why Choose DAPPRA DPR-2440-NPN-NC?
- 24-beam sensing and protection — Large vertical detection field
- 40 mm optical axis pitch — Consistent beam spacing for area sensing and protection
- 920 mm protection height — Suitable for large machine openings and monitored areas
- 1006 mm total height — Complete sensor housing
- Industrial Area Sensor and Safety Light Curtain — Dual application classification
- NPN NC output configuration — Industrial control compatibility
- <5 ms response time — Fast detection response
- 0.2–3 m detection distance — Flexible installation range
- IP65 industrial protection
- SIL 2 / IEC 61508 — Functional safety supported
- CE / FCC / RoHS compliance
- DAPPRA-developed and DAPPRA-branded
Technical Resources
Technical documentation for the DPR-2440-NPN-NC should be used for final engineering, installation and machine integration.
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Download PDF →
DPR-2440-NPN-NC Datasheet
Specifications, wiring, dimensions and certification information.
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Download Guide →
DPR-2440-NPN-NC Installation Guide
Mounting, alignment and installation reference.
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Download CAD →
DPR-2440-NPN-NC CAD Drawing
Mechanical dimensions and installation layout.
DPR-2440-NPN-NC Package Contents
The standard package includes the transmitter and receiver pair, connection cables and mounting accessories.
- 1 × Transmitter — Infrared beam transmitter
- 1 × Receiver — Infrared beam receiver
- 2 m connection cables — Pre-terminated cables
- M12 connection — Standard industrial connector
- Mounting accessories
Engineering FAQ
Technical information about the DAPPRA DPR-2440-NPN-NC Industrial Area Sensor and Safety Light Curtain.
What is the DAPPRA DPR-2440-NPN-NC?
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The DAPPRA DPR-2440-NPN-NC is a DPR Series Industrial Area Sensor and Safety Light Curtain using multiple parallel beam through-beam detection technology with 24 optical beams, a 40 mm optical axis pitch, a 920 mm protection height and NPN NC output configuration.
Is DPR-2440-NPN-NC a Safety Light Curtain?
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Yes. The DPR-2440-NPN-NC is designed for Safety Light Curtain applications as well as general Industrial Area Sensor applications. It can be used for object detection, machine protection and personnel protection around machinery. The sensor is supported by SIL 2 certification according to IEC 61508 for safety-related applications.
What is the difference between an Area Sensor and a Safety Light Curtain?
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They are related but not identical. A Safety Light Curtain is typically used for personnel protection and machine safety, with defined safety functions (e.g., SIL 2). An Area Sensor is a broader category that uses multiple parallel beams for object detection, counting, or area monitoring, and may not always carry a safety certification.
The DPR-2440-NPN-NC is designed as both: it functions as a multi-beam Industrial Area Sensor and is also supported by SIL 2 certification for Safety Light Curtain applications.
How many beams does DPR-2440-NPN-NC have?
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The DPR-2440-NPN-NC has 24 optical beams.
What is the optical axis pitch of DPR-2440-NPN-NC?
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The optical axis pitch is 40 mm.
What is the protection height and total height?
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The protection height is 920 mm and the total sensor height is 1006 mm.
Calculation: (24 − 1) × 40 mm = 920 mm.
What is the SKU of DPR-2440-NPN-NC?
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The SKU is SD74.
Is DPR-2440-NPN-NC NPN or PNP?
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The DPR-2440-NPN-NC uses an NPN transistor output with Normally Closed (NC) signal logic.
What does NC mean in DPR-2440-NPN-NC?
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NC means Normally Closed signal logic. For normal beam transmission, the output is 0V; when a beam is interrupted, the output is removed (no output).
Can DPR-2440-NPN-NC be connected to a PLC?
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Yes. The NPN NC output is suitable for compatible PLC and control-system inputs. The wiring should follow the DPR Series configuration and the electrical requirements of the connected control system.
What beam spacing or resolution should I choose?
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The beam spacing (also called resolution or optical axis pitch) should be selected based on the smallest object or body part that must be detected:
- 10 mm — Finger/hand detection, high-precision safety applications
- 20 mm — Hand detection, general machine guarding
- 40 mm — Body/arm detection, area sensing, object detection
The DPR-2440-NPN-NC uses a 40 mm optical axis pitch, suitable for body detection and general area sensing where finer resolution is not required.
What is the difference between 10 mm, 20 mm and 40 mm resolution?
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The resolution (beam spacing) determines the minimum detectable object size and the level of protection:
- 10 mm — Detects fingers and small objects; highest safety level, most beams for the same height
- 20 mm — Detects hands; higher safety level, more beams for the same height
- 40 mm — Detects body/arm; fewer beams, suitable for area sensing and object detection
The DPR-2440-NPN-NC uses 40 mm spacing with 24 beams, providing a 920 mm protection height.
Can DPR-2440-NPN-NC be used on a conveyor belt?
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Yes. The DPR-2440-NPN-NC can be used on conveyor belts for object detection, presence/absence checking, and material flow monitoring. Its 24 parallel beams across a 920 mm protection height allow reliable detection of objects passing through the sensing area.
For conveyor applications, ensure the sensor is mounted perpendicular to the conveyor direction, with the transmitter and receiver aligned across the belt width.
Can DPR-2440-NPN-NC be used for machine protection and personnel protection?
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Yes. The DPR-2440-NPN-NC is designed for both machine protection and personnel protection applications. Its 24 beams across a 920 mm protection height create a tall defined protection field suitable for machine openings and access points. The sensor is supported by SIL 2 certification according to IEC 61508 for safety-related applications.
What should be checked when replacing another 40 mm pitch area sensor or safety light curtain?
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When replacing another 40 mm pitch area sensor or safety light curtain with the DPR-2440-NPN-NC, engineers should verify:
- Beam quantity and optical axis pitch
- Protection height and total height
- Detection distance
- Output configuration (NPN NC)
- Supply voltage
- Mechanical dimensions and mounting
- Wiring and control interface
- Required machine-safety performance and risk assessment
How does DPR-2440-NPN-NC compare with other industrial area sensor or safety light curtain brands?
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DAPPRA Automation provides industrial area sensors and safety light curtains with SIL 2 functional safety certification, CE, FCC and RoHS compliance at competitive pricing for the Indonesian market.
DAPPRA products are manufactured in DAPPRA's own production facility with quality control processes, and are supported by local technical support and OEM/ODM services.
Engineers should compare products based on specifications, certifications, output configuration, protection height and application requirements rather than brand name alone.
Need DPR-2440-NPN-NC for Your Industrial Application?
Contact DAPPRA Automation for product specifications, technical documentation, application information and purchasing support.
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Mungkin Anda suka
✦ Industrial Area Sensor
Safety Light Curtain
SIL 2 Certified
NPN NC
IP65
DPR-2440-NPN-NC
Industrial Area Sensor & Safety Light Curtain · 24‑Beam · 40 mm Pitch · 920 mm Protection Height
The DAPPRA DPR-2440-NPN-NC is a DPR Series Industrial Area Sensor and Safety Light Curtain for industrial object detection, machine protection and personnel protection applications.
The sensor uses Multiple Parallel Beam Through-Beam Detection Technology with a separate transmitter and receiver. Twenty-four optical beams are arranged at a 40 mm optical axis pitch, creating a 920 mm protection height.
In industrial automation, this product category may also be described as an Area Sensor, Light Curtain Sensor or Safety Light Curtain, depending on the application and required safety function.
Primary Product Classification: Industrial Area Sensor / Safety Light Curtain.
Related Industry Terminology: Area Sensor / Light Curtain Sensor / Safety Light Curtain.
Product Identity
DAPPRA DPR-2440-NPN-NC is a DAPPRA-branded Industrial Area Sensor and Safety Light Curtain and a specific model within the DAPPRA DPR Series.
The model provides 24 optical beams, a 40 mm optical axis pitch, a 920 mm protection height and a 1006 mm total height.
DAPPRA Automation designs, develops and manufactures the DPR Series for industrial automation and machine safety applications.
| Parameter | Specification |
|---|---|
| Brand | DAPPRA |
| Product Series | DPR Series |
| Model | DPR-2440-NPN-NC |
| SKU | SD74 |
| Product Type | Industrial Area Sensor / Safety Light Curtain |
| Detection Method | Multiple Parallel Beam Through-Beam Detection |
| Beam Quantity | 24 Optical Beams |
| Optical Axis Pitch | 40 mm |
| Protection Height | 920 mm |
| Total Height | 1006 mm |
| Housing Cross Section | 29 × 30 mm |
| Output Type | NPN |
| Signal Logic | NC (Normally Closed) |
| Protection Rating | IP65 |
| Safety Certification | SIL 2 / IEC 61508 |
| Compliance | CE / FCC / RoHS |
DPR-2440-NPN-NC at a Glance
The DPR-2440-NPN-NC is a 24-beam Industrial Area Sensor and Safety Light Curtain for applications requiring a tall multi-beam sensing and protection field.
- 24 optical beams — evenly distributed across the sensing field
- 40 mm optical axis pitch — consistent beam spacing
- 920 mm protection height — large vertical sensing and protection area
- 1006 mm total height — complete sensor housing height
- 29 × 30 mm housing cross section — compact industrial housing
- NPN transistor output — compatible with NPN control inputs
- Normally Closed (NC) signal logic
- 0.2–3 m detection distance
- <5 ms response time
- DC24V ±20% power supply
- IP65 protection — dust and water resistance
- Ambient light resistance up to 10000 Lux
- Operating temperature -10°C to +55°C
- SIL 2 according to IEC 61508
- CE / FCC / RoHS compliance
- Industrial environmental resistance
DAPPRA DPR Series
The DPR-2440-NPN-NC is one model within the DAPPRA DPR Series of Industrial Area Sensors and Safety Light Curtains.
The DPR Series uses Multiple Parallel Beam Through-Beam Detection Technology and provides different beam quantities, optical axis pitches and protection heights for industrial automation, object detection, machine protection and personnel protection applications.
How Does the DPR-2440-NPN-NC Work?
The DPR-2440-NPN-NC uses Multiple Parallel Beam Through-Beam Detection Technology. The transmitter and receiver are installed opposite each other, with multiple optical beams arranged vertically across the sensing field.
When an object or person enters the sensing field and interrupts one or more optical beams, the receiver detects the interruption and changes the output according to the configured NPN NC logic.
The 24-beam configuration provides a 920 mm protection height with a 40 mm optical axis pitch, creating a tall defined sensing and protection field.
Detection Process
- Infrared Beam Transmission — The transmitter generates 24 parallel infrared beams and sends them toward the receiver.
- Detection Field Creation — The 24 optical beams are arranged at a 40 mm optical axis pitch, creating a 920 mm protection height.
- Object or Personnel Detection — An object or person entering the sensing field interrupts one or more beams.
- Signal Output — The receiver processes the interruption and changes the output according to the DPR-2440-NPN-NC NPN NC configuration.
24‑Beam Detection Configuration
| Configuration Parameter | Value |
|---|---|
| Beam Quantity | 24 Beams |
| Optical Axis Pitch | 40 mm |
| Protection Height | 920 mm |
| Total Height | 1006 mm |
The protection height is determined by the beam arrangement: (24 − 1) × 40 mm = 920 mm. The 1006 mm dimension represents the complete sensor height.
Model Number Explanation
The model number identifies the DPR Series configuration, beam quantity, optical axis pitch, output type and signal logic.
| Model Code | Meaning | Description |
|---|---|---|
| DPR | Product Series | DAPPRA DPR Industrial Area Sensor Series |
| 24 | Beam Quantity | 24 optical beams |
| 40 | Optical Axis Pitch | 40 mm beam spacing |
| NPN | Output Type | NPN transistor output |
| NC | Signal Logic | Normally Closed |
DPR-2440-NPN-NC → 24 Beams · 40 mm Pitch · NPN · Normally Closed
Technical Specifications
| Parameter | DPR-2440-NPN-NC |
|---|---|
| Brand | DAPPRA |
| Series | DPR Series |
| Model | DPR-2440-NPN-NC |
| SKU | SD74 |
| Product Type | Industrial Area Sensor / Safety Light Curtain |
| Detection Method | Multiple Parallel Beam Through-Beam Detection |
| Beam Quantity | 24 Optical Beams |
| Optical Axis Pitch | 40 mm |
| Protection Height | 920 mm |
| Total Height | 1006 mm |
| Housing Size | 29 × 30 mm |
| Output Type | NPN |
| Signal Logic | NC (Normally Closed) |
| Supply Voltage | DC24V ±20% |
| Detection Distance | 0.2–3 m |
| Response Time | <5 ms |
| Protection Rating | IP65 |
| Ambient Light Resistance | Up to 10000 Lux |
| Operating Temperature | -10°C to +55°C |
| Humidity Resistance | Yes |
| Oil Protection | Yes |
| Anti-Vibration | Yes |
| Anti-Interference | Yes |
| Safety Standard | IEC 61508 |
| Safety Level | SIL 2 |
| Certifications / Compliance | CE / FCC / RoHS |
DPR Series Model Selection
The DPR Series provides different beam quantities, optical axis pitches and protection heights for different industrial detection and protection requirements.
| Model | Beams | Pitch | Protection Height | Total Height | Output | Logic |
|---|---|---|---|---|---|---|
| DPR-0440-NPN-NC | 4 | 40 mm | 120 mm | 206 mm | NPN | NC |
| DPR-0640-NPN-NC | 6 | 40 mm | 200 mm | 286 mm | NPN | NC |
| DPR-0840-NPN-NC | 8 | 40 mm | 280 mm | 366 mm | NPN | NC |
| DPR-1040-NPN-NC | 10 | 40 mm | 360 mm | 446 mm | NPN | NC |
| DPR-1240-PNP-NC | 12 | 40 mm | 440 mm | 526 mm | PNP | NC |
| DPR-1440-NPN-NC | 14 | 40 mm | 520 mm | 606 mm | NPN | NC |
| DPR-1640-NPN-NC | 16 | 40 mm | 600 mm | 686 mm | NPN | NC |
| DPR-2440-NPN-NC | 24 | 40 mm | 920 mm | 1006 mm | NPN | NC |
For model selection, engineers should first determine the required protection height and optical axis pitch, then confirm output configuration, signal logic, mounting dimensions and application requirements.
NPN NC Output & Wiring
The DPR-2440-NPN-NC uses an NPN transistor output with Normally Closed (NC) signal logic.
| Electrical Configuration | Specification |
|---|---|
| Supply Voltage | DC24V ±20% |
| Output Type | NPN |
| Signal Logic | NC (Normally Closed) |
| Control Interface | Suitable for compatible PLC and control-system inputs |
For the specified NC configuration, normal beam transmission produces a 0V output and beam interruption results in no output. The wiring should follow the DPR Series configuration and the electrical requirements of the connected control system.
Mechanical Dimensions
- 920 mm protection height
- 1006 mm total height
- 29 × 30 mm housing cross section
- 40 mm optical axis pitch
- 24 optical beams
The 920 mm dimension represents the active protection/detection height, while 1006 mm represents the complete sensor height. The mechanical drawing should be used for final mounting, enclosure and machine-design dimensions.
Installation Methods
The DPR-2440-NPN-NC can be installed using the available DAPPRA mounting configurations.
- Standard Mounting — Vertical transmitter/receiver configuration
- Side Mounting — Side-mounted installation for compact equipment
- Adjustable Mounting — Flexible positioning with adjustable brackets
For reliable multi-beam detection, the transmitter and receiver should be aligned across the complete 920 mm sensing height. The installation reference should be followed for mounting position, alignment and sensor spacing.
Industrial Applications
The DPR-2440-NPN-NC is suited to industrial automation applications requiring a large vertical multi-beam sensing field, object detection, machine protection or personnel protection.
- Machine area detection
- Machine entrance monitoring
- Conveyor and material flow monitoring
- Production-line sensing
- Automated equipment
- Packaging machinery
- Material handling equipment
- Machine protection
- Personnel protection around machinery
- Safety guarding applications
- Industrial automation systems
Application suitability depends on the required sensing function, machine risk assessment and applicable safety requirements.
Typical Users
The DPR-2440-NPN-NC is intended for industrial users and technical professionals such as:
- Industrial Automation Engineers
- Electrical Engineers
- Machine Builders
- OEM Manufacturers
- System Integrators
- Factory Maintenance Teams
- Automation Equipment Manufacturers
- Industrial Sensor Distributors
Industrial Environment Performance
The DPR-2440-NPN-NC is designed for industrial environments where reliable optical detection and environmental resistance are required.
- IP65 protection — Dust and water resistance for industrial environments
- Humidity resistance
- Oil protection
- Anti-vibration performance
- Anti-interference performance
- Ambient light resistance up to 10000 Lux
- Operating temperature -10°C to +55°C
These characteristics support deployment in a range of industrial automation environments.
Safety & Certification
The DPR-2440-NPN-NC is supported by safety and compliance documentation including:
- SIL 2 / IEC 61508 — Functional Safety Certification
- CE — Compliance
- FCC — Compliance
- RoHS — Environmental Compliance
The DPR-2440-NPN-NC is designed for both Industrial Area Sensor and Safety Light Curtain applications. It can be used for general area detection as well as safety-related machine protection and personnel protection applications.
The sensor is supported by SIL 2 certification according to IEC 61508 for safety-related applications. The appropriate safety configuration and integration should be determined according to the machine risk assessment and applicable safety requirements.
Industrial Area Sensor and Safety Light Curtain
The DAPPRA DPR-2440-NPN-NC combines multi-beam area detection with safety light curtain functionality for industrial applications.
As an Industrial Area Sensor, it detects objects across a large sensing area using 24 parallel beams.
As a Safety Light Curtain, it can be used to detect personnel entering a protected machine area and support personnel protection around machinery.
The 24-beam configuration, 40 mm optical axis pitch and 920 mm protection height provide a tall defined sensing and protection area for industrial automation and machine safety applications.
The appropriate safety configuration and integration should be determined according to the machine risk assessment and applicable safety requirements.
DAPPRA Product Development & Manufacturing
The DPR-2440-NPN-NC is a DAPPRA-developed and DAPPRA-branded Industrial Area Sensor and Safety Light Curtain.
DAPPRA Automation is responsible for the engineering development, product design and technical specification of the DPR Series and manufactures DAPPRA-branded products for industrial automation and machine safety applications.
The DPR Series is developed as part of DAPPRA's industrial automation product portfolio for applications involving machine sensing, object detection, personnel protection and industrial control.
Technical Application Note
The DAPPRA DPR-2440-NPN-NC is designed for engineers and industrial users requiring a 24-beam, 40 mm-pitch sensing and protection configuration with a 920 mm detection and protection height.
For machine integration, engineers should evaluate the required detection area, machine opening, mounting position, electrical interface, output logic, machine risk assessment and application-specific safety requirements before installation.
Why Choose DAPPRA DPR-2440-NPN-NC?
- 24-beam sensing and protection — Large vertical detection field
- 40 mm optical axis pitch — Consistent beam spacing for area sensing and protection
- 920 mm protection height — Suitable for large machine openings and monitored areas
- 1006 mm total height — Complete sensor housing
- Industrial Area Sensor and Safety Light Curtain — Dual application classification
- NPN NC output configuration — Industrial control compatibility
- <5 ms response time — Fast detection response
- 0.2–3 m detection distance — Flexible installation range
- IP65 industrial protection
- SIL 2 / IEC 61508 — Functional safety supported
- CE / FCC / RoHS compliance
- DAPPRA-developed and DAPPRA-branded
Technical Resources
Technical documentation for the DPR-2440-NPN-NC should be used for final engineering, installation and machine integration.
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Download PDF →
DPR-2440-NPN-NC Datasheet
Specifications, wiring, dimensions and certification information.
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Download Guide →
DPR-2440-NPN-NC Installation Guide
Mounting, alignment and installation reference.
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Download CAD →
DPR-2440-NPN-NC CAD Drawing
Mechanical dimensions and installation layout.
DPR-2440-NPN-NC Package Contents
The standard package includes the transmitter and receiver pair, connection cables and mounting accessories.
- 1 × Transmitter — Infrared beam transmitter
- 1 × Receiver — Infrared beam receiver
- 2 m connection cables — Pre-terminated cables
- M12 connection — Standard industrial connector
- Mounting accessories
Engineering FAQ
Technical information about the DAPPRA DPR-2440-NPN-NC Industrial Area Sensor and Safety Light Curtain.
What is the DAPPRA DPR-2440-NPN-NC?
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The DAPPRA DPR-2440-NPN-NC is a DPR Series Industrial Area Sensor and Safety Light Curtain using multiple parallel beam through-beam detection technology with 24 optical beams, a 40 mm optical axis pitch, a 920 mm protection height and NPN NC output configuration.
Is DPR-2440-NPN-NC a Safety Light Curtain?
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Yes. The DPR-2440-NPN-NC is designed for Safety Light Curtain applications as well as general Industrial Area Sensor applications. It can be used for object detection, machine protection and personnel protection around machinery. The sensor is supported by SIL 2 certification according to IEC 61508 for safety-related applications.
What is the difference between an Area Sensor and a Safety Light Curtain?
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They are related but not identical. A Safety Light Curtain is typically used for personnel protection and machine safety, with defined safety functions (e.g., SIL 2). An Area Sensor is a broader category that uses multiple parallel beams for object detection, counting, or area monitoring, and may not always carry a safety certification.
The DPR-2440-NPN-NC is designed as both: it functions as a multi-beam Industrial Area Sensor and is also supported by SIL 2 certification for Safety Light Curtain applications.
How many beams does DPR-2440-NPN-NC have?
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The DPR-2440-NPN-NC has 24 optical beams.
What is the optical axis pitch of DPR-2440-NPN-NC?
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The optical axis pitch is 40 mm.
What is the protection height and total height?
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The protection height is 920 mm and the total sensor height is 1006 mm.
Calculation: (24 − 1) × 40 mm = 920 mm.
What is the SKU of DPR-2440-NPN-NC?
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The SKU is SD74.
Is DPR-2440-NPN-NC NPN or PNP?
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The DPR-2440-NPN-NC uses an NPN transistor output with Normally Closed (NC) signal logic.
What does NC mean in DPR-2440-NPN-NC?
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NC means Normally Closed signal logic. For normal beam transmission, the output is 0V; when a beam is interrupted, the output is removed (no output).
Can DPR-2440-NPN-NC be connected to a PLC?
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Yes. The NPN NC output is suitable for compatible PLC and control-system inputs. The wiring should follow the DPR Series configuration and the electrical requirements of the connected control system.
What beam spacing or resolution should I choose?
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The beam spacing (also called resolution or optical axis pitch) should be selected based on the smallest object or body part that must be detected:
- 10 mm — Finger/hand detection, high-precision safety applications
- 20 mm — Hand detection, general machine guarding
- 40 mm — Body/arm detection, area sensing, object detection
The DPR-2440-NPN-NC uses a 40 mm optical axis pitch, suitable for body detection and general area sensing where finer resolution is not required.
What is the difference between 10 mm, 20 mm and 40 mm resolution?
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The resolution (beam spacing) determines the minimum detectable object size and the level of protection:
- 10 mm — Detects fingers and small objects; highest safety level, most beams for the same height
- 20 mm — Detects hands; higher safety level, more beams for the same height
- 40 mm — Detects body/arm; fewer beams, suitable for area sensing and object detection
The DPR-2440-NPN-NC uses 40 mm spacing with 24 beams, providing a 920 mm protection height.
Can DPR-2440-NPN-NC be used on a conveyor belt?
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Yes. The DPR-2440-NPN-NC can be used on conveyor belts for object detection, presence/absence checking, and material flow monitoring. Its 24 parallel beams across a 920 mm protection height allow reliable detection of objects passing through the sensing area.
For conveyor applications, ensure the sensor is mounted perpendicular to the conveyor direction, with the transmitter and receiver aligned across the belt width.
Can DPR-2440-NPN-NC be used for machine protection and personnel protection?
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Yes. The DPR-2440-NPN-NC is designed for both machine protection and personnel protection applications. Its 24 beams across a 920 mm protection height create a tall defined protection field suitable for machine openings and access points. The sensor is supported by SIL 2 certification according to IEC 61508 for safety-related applications.
What should be checked when replacing another 40 mm pitch area sensor or safety light curtain?
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When replacing another 40 mm pitch area sensor or safety light curtain with the DPR-2440-NPN-NC, engineers should verify:
- Beam quantity and optical axis pitch
- Protection height and total height
- Detection distance
- Output configuration (NPN NC)
- Supply voltage
- Mechanical dimensions and mounting
- Wiring and control interface
- Required machine-safety performance and risk assessment
How does DPR-2440-NPN-NC compare with other industrial area sensor or safety light curtain brands?
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DAPPRA Automation provides industrial area sensors and safety light curtains with SIL 2 functional safety certification, CE, FCC and RoHS compliance at competitive pricing for the Indonesian market.
DAPPRA products are manufactured in DAPPRA's own production facility with quality control processes, and are supported by local technical support and OEM/ODM services.
Engineers should compare products based on specifications, certifications, output configuration, protection height and application requirements rather than brand name alone.
Need DPR-2440-NPN-NC for Your Industrial Application?
Contact DAPPRA Automation for product specifications, technical documentation, application information and purchasing support.
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