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DAPPRA DPR-2440-NPN-NC Industrial Area Sensor Safety Light Curtain Datasheet
Technical Datasheet
DPR-2440-NPN-NC Industrial Area Sensor: Technical Datasheet Explained
A complete guide to the DAPPRA DPR-2440-NPN-NC — a 24-beam Industrial Area Sensor and Safety Light Curtain with 40 mm optical axis pitch and 920 mm protection height.
Product Overview
The DAPPRA DPR-2440-NPN-NC is a DPR Series Industrial Area Sensor and Safety Light Curtain designed 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 and a 1006 mm total height.
For full product specifications and purchasing information, visit the DPR-2440-NPN-NC product page.
Product Identity
| 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 |
Technical Specifications
| Parameter | DPR-2440-NPN-NC |
|---|---|
| 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 |
| Safety Standard | IEC 61508 |
| Safety Level | SIL 2 |
| Certifications / Compliance | CE / FCC / RoHS |
Working Principle
The DPR-2440-NPN-NC uses Multiple Parallel Beam Through-Beam Detection Technology. 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.
Working principle of the DAPPRA DPR-2440-NPN-NC Industrial Area Sensor and Safety Light Curtain
24-Beam Detection Configuration
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
How to read the DAPPRA DPR-2440-NPN-NC model number
| 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
NPN NC Output & Wiring
The DPR-2440-NPN-NC uses an NPN transistor output with Normally Closed (NC) signal logic. For the specified NC configuration, normal beam transmission produces a 0V output and beam interruption results in no output.
Wiring diagram for the DAPPRA DPR-2440-NPN-NC NPN NC Industrial Area Sensor
DPR Series Model Selection
| Model | Beams | Pitch | Protection Height | Total Height |
|---|---|---|---|---|
| DPR-0440-NPN-NC | 4 | 40 mm | 120 mm | 206 mm |
| DPR-0640-NPN-NC | 6 | 40 mm | 200 mm | 286 mm |
| DPR-0840-NPN-NC | 8 | 40 mm | 280 mm | 366 mm |
| DPR-1040-NPN-NC | 10 | 40 mm | 360 mm | 446 mm |
| DPR-1240-PNP-NC | 12 | 40 mm | 440 mm | 526 mm |
| DPR-1440-NPN-NC | 14 | 40 mm | 520 mm | 606 mm |
| DPR-1640-NPN-NC | 16 | 40 mm | 600 mm | 686 mm |
| DPR-2440-NPN-NC | 24 | 40 mm | 920 mm | 1006 mm |
DAPPRA DPR Series Industrial Area Sensor Model Selection Table
Need the DPR-2440-NPN-NC for Your Application?
View full specifications, download technical documents and contact DAPPRA Automation for purchasing support.
View Product Page →Frequently Asked Questions
How many beams should I choose for a safety light curtain or area sensor?
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The number of beams depends on the required protection height and the optical axis pitch. More beams provide a taller protection field. The DPR-2440-NPN-NC uses 24 beams with a 40 mm pitch, providing a 920 mm protection height suitable for large machine openings and monitored areas.
What beam spacing or resolution should I choose?
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Beam spacing should be selected based on the smallest object or body part that must be detected: 10 mm for finger/hand detection, 20 mm for hand detection, and 40 mm for body/arm detection and area sensing. The DPR-2440-NPN-NC uses a 40 mm optical axis pitch, suitable for body detection and general area sensing.
How do I choose the correct sensing distance?
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The sensing distance must match the physical distance between the transmitter and receiver. The DPR-2440-NPN-NC supports a detection distance of 0.2–3 m, providing flexibility for most industrial installations.
What protection height do I need for my machine opening?
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The protection height should cover the full machine opening that must be monitored. The DPR-2440-NPN-NC provides a 920 mm protection height with a 1006 mm total height, suitable for large machine openings and access points.
What is the difference between NPN and PNP outputs?
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NPN (sinking) output switches the load to 0V when active, while PNP (sourcing) output switches the load to +24V. The choice depends on your PLC input type. The DPR-2440-NPN-NC uses an NPN output, suitable for NPN PLC inputs.
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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