Control for an extendable step for a railway carriage

摘要: Extendable steps must be capable of being actuated reliably and accurately in accordance with different platform heights spacings. Known mechanically sensing elements for determining the limit point their movement are not flexible enough this. Therefore, invention provides a control an extendable step having at least one contactless reflex sensor which is substantially non-damaging free wear. This permits railway platforms located distances to approached precisely.