The Siemens 3SF3200-1EV00-0BA1 is a position switch with an integrated ASI-F-adapter, carrying one normally-closed snap-action contact actuated by a moulded roller lever. The ASI-F interface means it connects directly onto an AS-Interface safety bus, so it reports its state over the network rather than running individual copper pairs back to a safety relay — saves wire and simplifies diagnostics on a guarded zone.
What the key features mean for fit
The 1 NC snap-action contact is a safety-rated normally-closed channel — in a safety circuit, the NC contact opens when the roller lever is actuated, which is the standard fail-safe behavior for guard-door monitoring or position interlock. The moulded roller lever gives a consistent actuation point and resists wear in high-cycle applications like packaging or material handling. Width 31 mm fits standard 32 mm grid mounting plates and leaves room alongside other safety components in the panel.