An innovative position switch for protective doors from the Siemens Industry Automation Division has a number of practical advantages. In addition to fulfilling the ASIsafe standard, the SIRIUS 3SF1324 position switch also fulfills the stringent demands of safety category SIL 2 / PL d and is equipped with a special logic: the operator receives a checkback signal from the magnet and no longer has to open the protective doors each time after magnet release in order to set machinery or plant to safe state again. This feature facilitates faster restart after door release. The new position switch with tumbler and ASIsafe is available in three versions: with auxiliary release at the front, with escape release …