The 3RT2017-1BB41-0CC0: The integrated 1 NO + 1 NC auxiliary switch (confirms auxiliary switch present) eliminates the need for a separate side-mount block in many basic interlocking or status-feedback circuits, saving one DIN-rail position.
Wire termination and environmental limits
Mechanical life is 30 000 000 cycles typical — this is the mechanical endurance, not the electrical endurance under load; electrical life will be lower and depends on the switched current and duty class.
