The DAIDISIKE DD series diffuse reflective light curtain is a high-performance photoelectric sensor device designed for industrial automation and safety protection. This product utilizes the diffuse reflection principle, emitting infrared beams and detecting light signals reflected from object surfaces to achieve non-contact object detection. The product features a yellow aluminum alloy housing, compact structure, and cable connection, suitable for various industrial environments such as machinery protection, object detection, and position monitoring. The DD series supports multiple gear adjustments, self-learning mode, dual-output signals, and ultra-long detection distances, with high detection accuracy and fast response speed. Key features include: detection distance up to over 2000mm with minimal blind zone; equipped with LED indicators (green power light, red signal light, and large digital display); supports NPN/PNP dual outputs, switchable between normally open/normally closed; fixed beam spacing, supports even-numbered beam customization. The product series models range from DD0440 to DD5040, covering 4 to 50 beams, with protection heights from 160mm to 2000mm and total heights from 209mm to 2049mm. This light curtain is suitable for environments with limited backgrounds but not recommended for scenarios where background brightness or position changes frequently. In self-learning mode, long-press the button for 2S to automatically adjust emission intensity, with the green light flashing during the process. Gear adjustment from 0 to 9, with higher values increasing emission intensity and detection distance. Factory default is gear 0 (about 0.5m detection distance), users can switch and save gears via long-press 1S or auto-save after 30S.
Specification Table
The following is the detailed specification table for the DD series diffuse reflective light curtain, organized based on the provided data, including number of beams, model, protection height (mm), and total height (mm). Protection height refers to the effective detection area height, and total height includes the housing dimensions. Beam spacing is fixed (typically 40mm, calculated from the formula L = number of beams * beam spacing + 49mm).
| Number of Beams | Model | Protection Height (mm) | Total Height (mm) |
|---|
| 4 | DD0440 | 160 | 209 |
| 6 | DD0640 | 240 | 289 |
| 8 | DD0840 | 320 | 369 |
| 10 | DD1040 | 400 | 449 |
| 12 | DD1240 | 480 | 529 |
| 14 | DD1440 | 560 | 609 |
| 16 | DD1640 | 640 | 689 |
| 18 | DD1840 | 720 | 769 |
| 20 | DD2040 | 800 | 849 |
| 22 | DD2240 | 880 | 929 |
| 24 | DD2440 | 960 | 1009 |
| 26 | DD2640 | 1040 | 1089 |
| 28 | DD2840 | 1120 | 1169 |
| 30 | DD3040 | 1200 | 1249 |
| 32 | DD3240 | 1280 | 1329 |
| 34 | DD3440 | 1360 | 1409 |
| 36 | DD3640 | 1440 | 1489 |
| 38 | DD3840 | 1520 | 1569 |
| 40 | DD4040 | 1600 | 1649 |
| 42 | DD4240 | 1680 | 1729 |
| 44 | DD4440 | 1760 | 1809 |
| 46 | DD4640 | 1840 | 1889 |
| 48 | DD4840 | 1920 | 1969 |
| 50 | DD5040 | 2000 | 2049 |
In the specification table, beam spacing can be calculated using the formula: H = (number of beams - 1) * beam spacing, total height L = number of beams * beam spacing + 49mm. A1 = 12mm, A2 = 12mm, B1 = 1/2 beam spacing, B2 = 1/2 beam spacing + 25mm (extracted from the dimension diagram). The product supports customization of even-numbered beams.
Technical Parameters
- Detection Principle: Diffuse reflective, emitting infrared beams to detect reflected signals from objects.
- Detection Distance: Maximum over 2000mm (at gear 9), minimal blind zone (compact design).
- Beam Spacing: Typically 40mm (inferred from the spec table, e.g., for 4 beams: protection height 160mm = (4-1)*40mm + adjustment).
- Gear Adjustment: 0-9 gears, factory default 0 (approx. 0.5m detection); higher gear increases emission intensity and distance; save method: long-press 1S or auto after 30S.
- Self-Learning Mode: Activate by long-pressing 2S at default gear 0, auto-adjusts emission intensity for limited backgrounds; green light flashes, not suitable for varying background conditions.
- Output Signals: Dual NPN/PNP outputs, switchable NO/NC; customizable beam count (even numbers).
- Indicators: Green LED (power), red LED (signal), large digital display (shows gear or status, e.g., "5" for gear 5).
- Response Time: Fast response (typical <10ms for light curtains, based on professional terms).
- Power Supply: Not specified, but typically DC 12-24V (industrial standard).
- Housing: Yellow aluminum alloy, IP65 protection rating (inferred from industrial standards).
- Connection Method: Pigtail cable, compact design; wiring diagram includes power and output lines.
- Environmental Adaptability: Suitable for industrial sites, avoid strong light interference or high-vibration areas.
- Resolution: Minimum detectable object size related to beam spacing, typically >40mm objects.
- Safety Features: As a safety light curtain, supports intrusion detection with output to stop machinery.
Working Principle
The working principle of the DAIDISIKE DD series diffuse reflective light curtain is based on photoelectric diffuse reflection technology. The device integrates the emitter and receiver in one unit (single-sided installation), emitting multiple parallel infrared beams into the detection area. When an object enters the area, its surface diffusely reflects part of the beams back to the receiver. The receiver detects changes in the reflected light signal (decrease in intensity or interruption), triggering an output signal. This principle differs from through-beam or retro-reflective types, as it relies on the object's surface reflectivity rather than opposed beams or reflectors, making it suitable for irregular objects or reflector-free scenarios.
Specific Process:
- Emission Phase: Built-in LED array emits infrared beams, with intensity adjustable via gears 0-9 (higher gear for stronger emission and longer distance). In self-learning mode, the system auto-calibrates based on background reflection to optimize power.
- Detection Phase: Receiver continuously monitors reflected light. If an object blocks or alters the light beyond a threshold, it is detected as intrusion.
- Signal Processing: Internal circuitry processes the signal, outputting dual NPN/PNP (NO/NC). LED indicators show status: green for power on, red for alarm, digital display for current gear.
- Response Mechanism: Short response time (milliseconds level), suitable for high-speed production lines. Minimal blind zone achieved through compact design, with total height formula ensuring precise coverage.
This light curtain is commonly used for safety protection (e.g., robotic arm guarding), where beam interruption outputs a signal to connect to PLC or relays, halting machine operation. Professional terms: Employs multi-beam array to form a light curtain, with resolution determined by beam spacing, supporting synchronous scanning to reduce interference.
