The 3SF3100-1EV00-0BA2 is a communication-capable position switch from Siemens, built for environments where a mechanical limit switch needs to talk back to the control network. It uses a roller lever actuator and positive opening contacts — meaning the NC contact is mechanically forced open even if the contacts weld, a requirement for safety circuits in crushers, conveyors, and other heavy machinery. The metal enclosure, painted and rated IP65, shrugs off the dust and washdown that a mineral processing plant throws at it. The housing follows EN 50041 (block design, 56 mm width), so it fits the standard footprint for this class of limit switch. Connection is via AS-i insulation displacement method — the switch integrates directly onto an AS-Interface flat cable without a separate module. That means one cable carries both power and signal back to the AS-i master, cutting wiring time on a panel rebuild or a greenfield line.
The positive opening function (IEC 60947-5-1) means the NC contact is mechanically linked to the actuator — if the roller lever is depressed, the NC contact opens regardless of contact condition. This is what makes the switch suitable for safety-related limit functions (e.g., guard door monitoring, overtravel detection) where a welded contact must not mask the open state. The metal housing (painted) handles the vibration and impact you get on a crusher or a vibrating screen better than a plastic-bodied limit switch would. The roller lever actuator is a standard choice for cam-operated positions on linear or rotary motion axes. It gives a defined actuation point and mechanical life that matches the machine's cycle count.
Integration Notes
Screw fixing to the machine frame or a mounting bracket — no DIN-rail clip on this one. The block housing (EN 50041) uses the same 56 mm wide footprint as other standard limit switches, so it can drop into an existing mounting hole pattern without drilling new holes. The AS-i connection uses the insulation displacement method: the flat AS-i cable is pressed into the adapter, and the contacts pierce the insulation. No stripping, no screw terminals on the AS-i side. The switch carries one NC contact (no NO contacts), so it reports a single binary state — typically used for a safety interlock or a position feedback signal.