The DINA Elektronik SAFEONE DNSR-2R2 is a configurable emergency stop and time delay safety relay engineered to provide flexible and reliable safety monitoring for industrial machinery. Unlike standard safety relays with fixed output behavior, the DNSR-2R2 can be factory-configured to provide instantaneous, off-delayed, or on-delayed contact outputs. This flexibility makes it an ideal solution for applications involving high-inertia machinery—such as woodworking saws, centrifuges, and metalworking machines—where hazardous motion persists for a defined period after a stop command is issued. By integrating a time delay directly into the safety relay, the DNSR-2R2 simplifies control panel design and eliminates the need for external timing modules.

From a functional safety perspective, the DNSR-2R2 is certified to meet stringent international standards. It achieves Performance Level d (PL d) and Safety Category 3 according to ISO 13849-1, and is designed for Stop Category 1 applications in accordance with IEC 60204-1. The device is also suitable for use in safety circuits complying with VDE0113, part 1, up to Category 3 and PL d. These certifications are supported by robust reliability metrics, including a Mean Time to Dangerous Failure (MTTFd) of 98 years and an extremely low Probability of Dangerous Failure per Hour (PFHd) of 4.3×10⁻⁸. The device provides two normally open (NO) safety outputs and one normally closed (NC) auxiliary output, with safety contacts rated for AC15 3A/250V and DC13 2A/24V, and a mechanical service life exceeding 10 million switching cycles.

The core of the DNSR-2R2's flexibility lies in its configurable time delay functionality. The device is supplied preconfigured to customer specifications, offering a choice of non-delayed, off-delayed, or on-delayed contact outputs. For the 33SR20 variant, the time delay can be adjusted directly on the device using integrated potentiometers, providing on-site flexibility. A typical application involves connecting the instantaneous contacts to cut motor power immediately upon an emergency stop, while the off-delayed contacts keep a protective guard or door locked for a preset duration, ensuring the hazardous motion has completely ceased before access is permitted. The device operates on a 24V DC supply and features screw terminals for secure wiring.

Installation is designed for panel mounting, with a compact footprint that conserves valuable control cabinet space. The device is housed in a non-reinforced polyamide (PA) enclosure rated IP20, necessitating installation within a control cabinet with a minimum protection class of IP54. It operates reliably within an ambient temperature range of -10°C to 60°C. The DNSR-2R2 holds CE and TÜV certifications and is backed by a manufacturer's service life of 240 months (20 years). With its combination of configurable time delay, robust safety certification, and user-friendly features, the DINA Elektronik SAFEONE DNSR-2R2 is a trusted core safety component for safeguarding industrial machinery in wood processing, metalworking, and automated manufacturing environments.

Technical Specifications