SICK WT24-2R220 (W24 Series) Photoelectric Sensor — Technical Overview

Overview:
The WT24-2R220 from SICK’s robust W24 series is a long-range photoelectric proximity sensor with state-of-the-art background suppression, designed for dependable object detection in harsh industrial environments.

Key Features

• Detection Principle: Photoelectric proximity sensor with background suppression—ideal for reliable target detection even with background interference sick.compzip.ru.

• Operating Range: Detects objects from 100 mm up to 2,500 mm, measured using objects with 90% reflectance (standard white, DIN 5033) sick.compzip.ru.

• Optical Specifications:

  • Emission via infrared LED light source sick.compzip.ru.

  • Light spot diameter approximately Ø 80 mm at the maximum range of 2,500 mm sick.compzip.ru.

Mechanical & Structural Design

• Form Factor: Compact rectangular body measuring 27 mm × 87.5 mm × 65 mm (W × H × D) sick.com+1.

• Housing: Rugged zinc die-cast metal construction, offering durability and advanced mechanical protection sick.compzip.ru.

• Ingress Protection: Rated IP67, ensuring dust-tight and waterproof operation sick.compzip.ru.

• Weight: Approximately 330 g sick.compzip.ru.

• Front Screen Heating: Integrated, enabling performance in low-temperature or high-moisture conditions sick.compzip.ru.

Electrical & Electronic Characteristics

• Supply Voltage: Universal 20 V AC/DC to 250 V AC/DC, offering flexibility for varied installations sick.compzip.ru.

• Power Consumption: Less than 3 VA sick.compzip.ru.

• Output Type: Electrically isolated relay (change-over contacts) for clean integration into control circuits sick.compzip.ru.

• Switching Modes: User-selectable Light-on / Dark-on functionality via a selector switch sick.compzip.ru.

• Switching Capacities:

  • Up to 4 A at 250 V AC, or 4 A at 24 V DC; 0.125 A at 250 V DC sick.compzip.ru.

  • Meets UL approval specifications for both general use and resistive loads sick.com.

• Performance:

  • Response time of ≤ 10 ms sick.compzip.ru.

  • Maximum switching frequency of 10 Hz, assuming a light/dark ratio of 1:1 sick.compzip.ru.

• Timing Functions:

  • Features both ON-delay and OFF-delay, adjustable between 0.5 s and 10 s via selector switch sick.compzip.ru.

• Connection: Terminal block with M16 gland, with rotational flexibility (up to 90° depending on variant) for ease of wiring sick.compzip.ru.

• Protection & Compliance:

  • Circuit protection features include reverse-polarity protection (A) and interference suppression (C) sick.compzip.ru.

  • Protection class II, in accordance with EN 60947-1 sick.compzip.ru.

Environmental & Reliability Specs

• Temperature Range:

  • Operating: –40 °C to +60 °C.

  • Storage: –40 °C to +75 °C sick.compzip.ru.

• MTTFD (Mean Time To Dangerous Failure): 535 years, supporting high system reliability sick.com.

• Certifications: Compliant with EU, UK, ACMA, Morocco, China-RoHS, CCC, cULus, and DIN EN 62471 for photobiological safety sick.com.

W24 Family Context & Benefits

As part of SICK’s W24 sensor family, the WT24-2R220 offers refined features optimized for industrial resilience:

• Rugged Longevity: High mechanical robustness via zinc die-cast housing and optional IP69K variants for extreme conditions sick.com.

• Built for Harsh Conditions: Includes high ambient-light immunity, front-screen heating, and predictive diagnostics to maintain uptime sick.com.

• Flexible Integration: Designed with multiple connection options (M12, M16), timing, operating modes, and voltage options to simplify installation across systems sick.com.