The SICK ReLy series is a SIL safety relay designed to meet the demanding requirements of modern machine safety applications. It achieves the highest safety integrity levels, certified to PL e (EN ISO 13849-1) and SIL 3 (IEC 61508), ensuring robust protection for operators and equipment. The ReLy family stands out not only for its safety credentials but also for its exceptional performance, delivering response times of under 10 milliseconds on compatible models. This speed allows for significantly shorter safety distances, enabling more compact machine designs and faster production cycles without compromising safety.

The ReLy series is engineered for ease of use and installation. Its slim, 18 mm-wide housing saves valuable space in control cabinets. The modules mount on standard DIN rails and feature a one-click release mechanism for quick and simple module exchange during maintenance. A single front connector with spring terminals streamlines wiring, reducing commissioning time and the potential for errors. These user-friendly features contribute to higher machine availability and lower total cost of ownership.

Comprehensive diagnostics are integrated directly into each ReLy module. Status LEDs provide clear visual indication of operational states, power status, and fault conditions, with additional LEDs flashing specific patterns for accurate troubleshooting. A dedicated diagnostic interface offers deeper insights into system health, enabling maintenance personnel to quickly identify and resolve issues, minimizing downtime. For applications requiring networked safety, variants of the ReLy series are available with support for the Flexi Loop safe series connection. This allows multiple safety sensors to be wired in series while maintaining high diagnostic coverage and eliminating fault masking. The portfolio includes models for monitoring sensors with OSSD outputs, equivalent/complementary safety switches, two-hand control units, and time-delayed switching applications, providing a versatile solution for a wide range of safety functions.

Technical Specifications