The Festo SMEO-2-LED-24 is a normally open reed switch rated for 24 V AC/DC supply, switching up to 1 A (1.2 A peak) with a 2 ms response time. It detects magnetic fields and electrical current, making it a straightforward fit for cylinder position sensing or magnetic proximity detection on pneumatic actuators.
The 24 V AC/DC supply voltage matches common control panel rails — no separate DC supply needed if your panel runs 24 VAC. The 1 A continuous rating (1.2 A peak) covers most PLC digital input loads and small solenoid valves. With a 2 ms switching time, it handles moderate-speed cylinder strokes; for high-cycle applications (above 500 Hz), a solid-state sensor would be a better choice. Operating temperature range of -20 to 60 °C suits most indoor industrial environments, though derating may apply near the upper end if mounted near heat sources. The reed switch design is inherently sealed, so no IP rating is listed, but the housing is suitable for dry, non-washdown locations.
Deployment Context
Typically mounted on pneumatic cylinder bodies using a clamping bracket or dovetail groove — common on Festo cylinders. The normally open output means it closes when the magnetic field from the piston is present, so it signals the cylinder position at the end of stroke.