Compact rotary limit switch for chain hoists and winches

Rotary Limit Switch Series FRS with up to 4 Contact Elements

Mechanical Specifications

  • 2-4 contacts
  • Revolution Ratio from 1:10 to 1:175
  • Snap-action contacts (1NO/1NC changeover)
  • different different cam widths

Electrical Specifications

  • Protection degree IP65
  • Operating temperature -20°C…+60°C
  • 12mm stainless steel shaft
  • Protection class II
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Catalogue Download

Find out more about the general features and technical specifications of the Rotary Limit Switch FRS in our current product catalogue. The Rotary Limit Switch FRS can be individually adapted to offer added value for machine safety. Premium engineering – that is our claim for every single Rotary Limit Switch FRS. We would like to convince you of this.


To give you a first overview of the Rotary Limit Switch FRS from B-COMMAND, we provide you with a 2D drawing of the Rotary Limit Switch FRS. Of course, the B-COMMAND team will be happy to advise you.
  • Request CAD drawing for Rotary Limit Switch FRS

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Rotary limit switch FRS - the compact cam limit switch

The new rotary limit switch of the FRS series stands out particularly due to its small dimensions. As the smallest rotary limit switch in our various series, it can be used especially where space is a critical factor.

In general, the rotary limit switch is used for motion control of industrial machines and industrial plants.

The revolutions of the shaft are transmitted to a cam switch mechanism, which actuates mechanical switching contacts. All variants of the switching contacts are designed as auxiliary current switches.

Reduction ratios from 1:15 to 1:175 are available for the rotary limit switches of the FRS series. The switch can be equipped with a maximum of 4 switching contacts. Each cam can be set individually to the desired position, thus allowing flexible definition of end positions and reference points.

To reduce abrasion and rusting, the transmission and guide shafts of the gear wheels are made of stainless steel.

All materials in direct contact with the environment are resistant to gases, oils and extreme temperature changes. The circumferential rubber seal provides optimum protection against dust and water, so that protection degree IP 65 can be easily achieved. The optimized interior allows quick and easy cabling.