Autonics S2ER-E4RBL Mushroom LED Emergency Push Button Switch

The Autonics S2ER-E4RBL Mushroom LED Emergency Push Button Switch is a 22/25 mm illuminated emergency stop with a red LED head and a D40 mushroom actuator, designed for rapid machine stops in automated lines. It mounts on panels with Ø22/25 mm openings and uses a push‑lock, turn‑reset action with a two‑contact block: 1 normally open and 1 normally closed (2NC). As part of the S2ER series, it includes an LED indicator to confirm status and a red lens that signals emergency stop readiness. Typical applications include conveyors, packaging machines, and assembly stations in automated production environments where an immediate stop is required. Variants in the S2ER family span different supply options for the LED block, including 12–24 VAC/DC on some models and higher AC options on others; verify the exact voltage and contact configuration for your exact part number from the datasheet or product listing.