Haake Technik GmbH > Products > Safety Mats HSM > Description > Information Safety Mats -Design and mode of operation of the Haake Safety Mat

Design and mode of operation of the Haake Safety Mat

As a general rule applies:
Machinery and devices presenting dangerous movements must be provided with an emergency stop device. This device is monitored by a suitable safety relay unit.


Our safety mats are built up of mechanically opening break contacts connected in series, in the form of a contact mat (see also our catalogue HSC Safety Edges). Current conducting contact plates and insulating wedge elements are alternately lined up on an expander cord. By pre-tension, the contact plates are pressed together, and the current circuit is made. When stepping on the safety mat, at least one of the contact plate pairs is separated by action of the wedge elements, and the current circuit is broken (see fig. bottom right).

Thus, a transformation of the output signal is not required, since a circuit interruption signal is directly available. This signal is fed to the safety relay unit already needed for the E-stop button. This means: wiring of the contact chain is performed in identical way as of an E-stop button. The number of lined-up contact plates and wedge elements depends on the size of the safety mat.

 

The contact mat is placed between rubber mats being sealed at their borders by profiles. The surface structure depends on customer's wishes or the requirements in use. The safety mats are manufactured in the sizes as specified by customer (max. & min. sizes see specification). Larger protection areas are achieved by several mats connected together.

Mode of operation of the Haake Safety Mat
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