In the realm of industrial automation, precision, reliability, and adaptability are paramount. The Keyence LR-TB2000C laser sensor stands out as a premier choice for engineers and integrators seeking to optimize their manufacturing and control systems. This article delves into the detailed specifications, features, and applications of the LR-TB2000C, highlighting its exceptional performance and versatility.

Overview

The Keyence LR-TB2000C is a cable-type laser sensor with an M12 connector, designed to provide accurate and stable detection over a wide range of distances. With a detectable distance spanning from 60 to 2000 millimeters (2.36 to 78.74 inches), it offers flexibility for various industrial applications, from close-range positioning to long-distance object detection.

Key Specifications

Light Source and Laser Class

The LR-TB2000C utilizes a red laser with a wavelength of 660 nanometers. It is classified as a Class 2 laser product according to IEC60825-1 and FDA (CDRH) Part1040.10 standards, ensuring safety during operation while delivering high-intensity light for precise detection.

Detection Performance

• Spot Diameter: The sensor features an approximate spot diameter of 4 millimeters (0.16 inches), allowing for fine detection of small objects or specific points on larger targets.
• Response Time: Users can select from multiple response times—1 ms, 10 ms, 25 ms, 100 ms, or 1000 ms—to match the sensor's performance with the specific requirements of their application.
• Timer Functions: The LR-TB2000C offers four timer modes: OFF, OFF delay, ON delay, and One-shot, providing flexibility in controlling the sensor's output based on time-based events.

Mutual Interference Prevention

In environments where multiple laser sensors are used in close proximity, mutual interference can be a concern. The LR-TB2000C addresses this issue with a built-in mutual interference prevention function, allowing up to four units to operate simultaneously without interference when the function is enabled.

Electrical Specifications

• Power Voltage: The sensor operates on a power supply ranging from 20 to 30 VDC, including a 10% ripple (P-P), and is classified as Class 2 or LPS (Limited Power Source).
• Current Consumption: It consumes 45 mA or less (without load), making it energy-efficient and suitable for various power-constrained applications.
• Control Output: The LR-TB2000C provides NPN open collector or PNP open collector selectable outputs, with a maximum voltage of 30 VDC, a current of 50 mA or less, and a residual voltage of 2 V or less. The output can be configured as normally open (N.O.) or normally closed (N.C.) to suit different control requirements.

Protection Circuits

To ensure long-term reliability and safety, the LR-TB2000C incorporates multiple protection circuits, including protection against reverse power connection, power supply surges, output overcurrent, reverse output connection, and output surge. These features safeguard the sensor from electrical damage and extend its operational lifespan.

Environmental Resistance

• Enclosure Rating: The sensor is rated IP65/IP67 (IEC60529), providing protection against dust ingress and temporary immersion in water, making it suitable for harsh industrial environments.
• Ambient Light Resistance: It can operate effectively under ambient light conditions of up to 100,000 lux, including incandescent lamps and sunlight, ensuring consistent performance in various lighting conditions.
• Temperature and Humidity: The LR-TB2000C can withstand ambient temperatures ranging from -20 to +55 °C (without freezing) and relative humidity levels from 35 to 85% RH (without condensation), making it adaptable to a wide range of environmental conditions.
• Vibration Resistance: It is designed to resist vibrations within the frequency range of 10 to 55 Hz, with a double amplitude of 1.5 mm, ensuring stable operation in vibrating machinery or conveyor systems.

Applications

The Keyence LR-TB2000C laser sensor finds applications across various industries, including automotive manufacturing, electronics assembly, packaging, and material handling. Its precise detection capabilities make it ideal for tasks such as:

• Object Detection and Positioning: Accurately detecting the presence or absence of objects on a conveyor belt or assembly line.
• Dimension Measurement: Measuring the height, width, or thickness of components with high precision.
• Level Detection: Monitoring the level of liquids or granular materials in tanks or hoppers.
• Quality Control: Inspecting products for defects or deviations from specified dimensions during the manufacturing process.

Conclusion

The Keyence LR-TB2000C laser sensor is a high-performance, versatile component that meets the rigorous demands of modern industrial automation. Its precise detection capabilities, robust construction, and comprehensive protection features make it an ideal choice for engineers and integrators seeking to optimize their manufacturing and control systems. Whether used for object detection, dimension measurement, level detection, or quality control, the LR-TB2000C delivers consistent, reliable performance, enhancing productivity and efficiency in various industrial applications.