ABB 1SNA645029R0600 Sirius Safety Relay Module

The ABB 1SNA645029R0600 Sirius Safety Relay Module (OBOA2000-24VDC) is a DIN-rail mounted optically isolated safety interface that uses a 24 V DC control signal to drive a solid-state output. Its output is a triac-type relay capable of switching up to 230 V AC at 2 A, enabling safe control of AC loads from a low-voltage control circuit. As part of ABB’s Sirius Safety family, this module provides a compact, modular solution for safety-related interlocking and emergency-stop circuits in automation panels. Typical applications include machine guarding, safety interlocks, and emergency-stop circuits where isolation between the control electronics and power side is required. The OBOA2000-24VDC designation identifies the 24 V DC input variant compatible with ABB safety architectures and designed for DIN-rail installation.