Safety switch with tumbler locking — 1300 N holding force
The Siemens SIRIUS 3SF1324-1SF21-1BK4 is a mechanical safety position switch with a tumbler locking mechanism rated at 1 300 N locking force, designed for guard-door monitoring on machinery where a positive-opening contact is required per EN ISO 14119. The 1 300 N holding force means the switch resists forced entry up to that level — critical for applications where an operator could lean against or push a guard door during a cycle. The switch accepts actuation from five directions of approach, simplifying alignment on hinged or sliding guards.
IP69-rated enclosure — washdown-ready
Rated IP65, IP67, and IP69, the plastic enclosure withstands high-pressure, high-temperature washdown common in food-and-beverage or pharmaceutical lines. The fixed M12 plug (4-pole, ASI+ on pin 1, ASI- on pin 3) keeps the connection sealed and eliminates field wiring errors.
ASIsafe integrated — two-channel evaluation
The switch integrates ASIsafe communication with slave profile 7.B.F. Channel 1 monitors the actuator (2 NC contacts per 2v2 evaluation principle); channel 2 monitors the magnet (1 NC). This dual-channel architecture meets SIL 3 / PL e requirements when wired to a compatible safety monitor. The magnet coil runs on 24 V AC/DC. Repeat accuracy is 0.1 mm, and mechanical service life is typically 1 000 000 operating cycles.
Current production — sourced to order
Lifecycle stage is current. The separate actuator (3SE5000-0AV0) must be ordered separately. For BOM-fit confirmation, the key ratings are the 1 300 N locking force, IP69 ingress protection, and the ASIsafe profile — verify these match your safety circuit design.