Pepperl+Fuchs (Twinsburg, OH) has added flat-pack-style transmitter coupling devices to the WIS (short-range wireless inductive coupling system) product family. The new devices allow power and signal coupling to be transferred across an air gap of up to 20 mm. These wireless devices allow sensors to be connected to moveable platforms without twisting and rotating cables. Applications include rotating tables, moving pallets, modular tooling platforms, and sliding fixtures.
Sensors can be placed on an exchangeable machine cartridge element and electrical signals are passed across an air gap to the control system auxiliary or main control panel. The WIS transfers both power and signal without the use of batteries by using two transmission elements that allow transfer when they come within the required proximity range. The WIS system can inter face to eight PNP sensors via a single interface block. Multiple secondary modules can be connected to a single primary, whether they are being used for inductive, capacitive, ultrasonic, or photoelectric sensing. They are side-powered by 24 VDC.
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