Product Overview

The SICK L29 safety light-beam sensor is a Type 2 safety device designed for reliable detection in industrial environments. It operates using a single beam to detect the presence or absence of an object within its scanning range, providing a high level of safety performance as defined by IEC 61496-1. With a mission time of up to 20 years under EN ISO 13849 standards, this sensor ensures long-term operational reliability. The L29 is ideal for applications requiring safe machine guarding and process monitoring where fast response times are critical. Its robust construction and high environmental resistance make it suitable for demanding industrial settings. Designed with safety-critical performance in mind, the L29 delivers consistent operation across a wide range of operating conditions.

Key Features and Technology

The L29 features a single scanning beam with a response time of 0.54 ms, ensuring rapid detection for real-time safety control. It operates in accordance with Type 2 safety classification (IEC 61496-1), which requires specific testing procedures to maintain safety integrity. The sensor is designed to work exclusively with the Flexi Classic test device (UE410-MU) to verify its safety-related response, as stated in official documentation. This ensures compliance with required test rates and internal/external test intervals of at least 100 between safety-related responses. The technology combines high-speed detection with robust environmental protection, enabling dependable performance even under challenging conditions.

Technical Characteristics

The L29 has a scanning range of 6 meters and a light spot diameter of 25 mm at a distance of 1 meter. It features a switching output in PNP configuration with a maximum current loading of ≤100 mA. The sensor operates within a supply voltage range of 19.2 V DC to 30 V DC (rated at 24 V DC). With a cable length of 120 mm and a permitted maximum cable length of 30 meters, it offers flexibility in installation while maintaining signal integrity. The housing is made from VISTAL® material, providing durability and resistance to environmental factors. Dimensions are 12.2 mm (width) × 50 mm (height) × 23.6 mm (depth), with a weight of +80 g. It meets multiple IP ratings including IP65, IP66, IP67, and IP69K for protection against dust and water ingress.

Configuration and Integration

The L29 connects via a male M12, 4-pin connector and is designed to be integrated into safety systems using the Flexi Classic test device (UE410-MU). This integration ensures compliance with IEC 61496-1 requirements for safety-related response testing. The sensor must be tested at least once every 100 operations between two safety-related responses, as per official statements. The test rate must not exceed the specified limits to maintain device integrity. Integration is straightforward due to standardized connectors and clear compatibility with SICK’s safety ecosystem. Proper installation requires adherence to permitted cable length (≤30 m) and correct voltage supply within the 19.2 V DC to 30 V DC range.

Operating Environment

The L29 is designed for operation in a wide ambient temperature range from –40 °C to +60 °C, making it suitable for both cold and hot industrial environments. It can be stored in temperatures ranging from –40 °C to +75 °C without degradation of performance or materials. The sensor’s IP69K rating ensures protection against high-pressure water jets and harsh cleaning conditions, ideal for use in food, chemical, or automotive manufacturing where exposure to liquids or dust is common. Its robust housing and sealing provide reliable operation even in dusty or wet environments, ensuring consistent safety performance across diverse industrial applications.

Industrial Applications

The SICK L29 safety light-beam sensor is ideal for use in machine guarding, conveyor systems, and process monitoring where object detection is required to prevent unsafe conditions. Its 6-meter scanning range and fast response time (0.54 ms) make it suitable for dynamic environments such as automated assembly lines or robotic operations. The sensor’s IP69K rating supports use in high-humidity or wet areas like food processing or cleaning stations. It can be used in conjunction with safety circuits to ensure personnel protection during machine operation. Its compatibility with the Flexi Classic test device ensures ongoing compliance with safety standards, making it a trusted choice for industrial automation systems requiring certified safety performance.