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The SICK PLG Automation Light Grid is a robust, five-beam photoelectric retro-reflective sensor designed for reliable object detection in industrial environments. It provides precise monitoring of presence or absence using a beam-based principle, with a minimum detectable object size of 35 mm. The sensor features a compact aluminum housing and an IP54 enclosure rating, ensuring durability against dust and light splashing. With a detection height of 120 mm and a beam separation of 30 mm, it offers high sensitivity while maintaining spatial accuracy. Ideal for safety and process control applications, the PLG delivers consistent performance in demanding settings through its reliable switching output and built-in circuit protection.
The SICK PLG utilizes a photoelectric retro-reflective principle to detect objects by monitoring beam interruptions. It operates with five distinct beams spaced 30 mm apart, enabling precise object detection down to a minimum detectable object of 35 mm. The sensor activates in Q mode (active when at least one beam is interrupted) and deactivates when all beams are clear, providing reliable state feedback. Its PNP switching output ensures compatibility with standard industrial control systems. The sensor includes reverse polarity protection, UV connections, interference pulse suppression, and short-circuit protection for enhanced safety and stability in real-world conditions.
The SICK PLG has a detection height of 120 mm and operates within a supply voltage range of DC 15 V to 30 V. Ripple voltage is less than 5 V peak-to-peak, ensuring stable operation under varying loads. The maximum output current is ≤100 mA, with capacitive and inductive load ratings of 100 nF and 1 H respectively. Current consumption during LED operation is 10 mA. Output mode is Q dark switching: the output is active when at least one beam is interrupted. The sensor features a cable connection via M12, 4-pin plug with a 280 mm cable length. Dimensions are 19.2 mm (W) × 199.8 mm (H) × 36.6 mm (D), and the housing is made of aluminum. The protection class is III.
The SICK PLG integrates seamlessly into industrial automation systems via its M12, 4-pin cable connection with a 280 mm cable length. The PNP switching output allows direct compatibility with most PLCs or control panels without additional interface components. The Q dark switching mode ensures clear signal interpretation: the output activates when any beam is broken and returns to inactive state when all beams are unobstructed. The sensor’s built-in circuit protection—including reverse polarity, short-circuit, and interference pulse suppression—reduces integration complexity and enhances system reliability. No external power regulation or additional components are required for standard operation.
The SICK PLG is designed for use in industrial environments with ambient temperatures ranging from -25 °C to +70 °C, though specific environmental limits should be verified per application. The IP54 enclosure rating provides protection against dust ingress and light splashing, making it suitable for use in areas where exposure to debris or moisture is possible. It operates reliably under standard industrial conditions with a supply voltage of DC 15 V to 30 V. The sensor is protected against reverse polarity, short circuits, and electrical interference, ensuring stable performance even in electrically noisy environments.
The SICK PLG is ideal for use in automated production lines where object presence or absence must be reliably monitored. It is commonly applied in safety systems to detect the presence of personnel or tools, and in process control applications such as detecting product positioning or material flow. Its five-beam configuration ensures high detection accuracy with a minimum detectable object size of 35 mm. The sensor’s compact design and robust construction make it suitable for integration into machinery guarding, conveyor systems, and automated assembly lines where reliable, fail-safe detection is essential.
| Specification | Value |
|---|---|
| Beam separation | 30 mm |
| Number of beams | 5 |
| Detection height | 120 mm |
| Switching output | PNP 2) |
| Connection type | Cable with plug, M12, 4-pin, 280 mm |
| Housing material | Aluminum |
| Protection class | III |
| Weight | 200 g |
| Response time | < 80 ms 1) |
| Supply voltage | V s |
| Current consumption | job LED |
| Dimensions | (W x H x D) |
| Ambient temperature | , storage |
| Minimum detectable object (MDO) | 35 mm 1) |
| value | < 80 ms 1) |
| Supply voltage V s | DC 15 V ... 30 V 1) |
| Ripple | < 5 V pp |
| Output current I max. | ≤ 100 mA |
| Output load, capacitive | 100 nF |
| Output load, Inductive | 1 H |
| Output mode | Q dark switching 3) |
| Current consumption job LED | 10 mA 1) |
| Dimensions (W x H x D) | 19.2 mm x 199.8 mm x 36.6 mm |
| Enclosure rating | IP54 |
| Circuit protection | U V connections, reverse polarity protected Output Q short-circuit protected Interference pulse suppression |
| Maximum range | 2 m |
| Minimum range | ≥ 110 mm |
| Operating range | 1.3 m |
| Ambient operating temperature | –10 °C ... +55 °C |
| Ambient temperature, storage | –40 °C ... +70 °C |
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