The BT51T 24DC safety relay is a compact universal/expansion safety relay designed to monitor safety devices (e.g. emergency‑stop buttons, safety switches/interlocks, safety mats/edges, light‑curtains, gates/doors) and provide multiple safety‑rated outputs. It accepts either single‑ or dual‑channel safety inputs, supports supervised reset/test input (ensuring downstream contactors or valves have dropped before restart), and can function as a stand‑alone safety relay or as an output‑expansion relay. Its compact width (22.5 mm) and DIN‑rail mounting make it suitable for installation in control cabinets, and front‑panel LEDs provide status indication (supply, relay, and output status). Delay for output drop (soft‑stop) is configurable between 0 and 1.5 s, enabling controlled shutdowns when required.
