Gebhard Balluff Fabrik Feinmechanischer Erzeugnisse Gmbh & Co.

Gebhard Balluff Gmbh & Co.

Gebhard Balluff

Heinz Kammerer

Sorin Fericean

Peter Dolderer

Ernst Gass

Hans-Werner Plank

Bernd Fingerle

Reinhard Stumpe

Hans Langheinrich

For appropriately polarity recognition and corresponding switchover of a output stage of a proximity switch or the like connected to a supply voltage (VB), even while continuously activated, when a change in load polarity occurs, the proximity switch having in each case a high side driver and a low side driver, it is proposed to define on the output-side voltage axis between the positive supply voltage (+VB) and the negative pole or ground an upper and a lower detection window which sense the load configuration, each at a distance from the working points (which remain in a steady state) of each output stage driver, such that when a change in load configuration occurs, the potential of the output connection, to which the load configuration detection stage is connected, passes only briefly through these detection windows, and such that the transient signal changes which result therefrom in each window region are used for appropriately polarized switchover to the respective correct output stage circuit section based on a switchover of the load configuration detection stage.

Method and arrangement for appropriately polarity recognition and

A proximity switch is provided which has a programmable parameter such as a programmable switching threshold and/or programmable switching function. The device is programmable using a digital signal that is applied to a conventional terminal of the proximity switch. For example, the conventional power signal for operating the proximity switch can be modulated by a programming signal for use in programming the proximity switch parameters. The program signal could also be input to a conventional output terminal of the proximity switch.

Proximity switch operating in a non-contacting manner

Proximity switch insensitive to interference fields

The invention relates to a two-wire switch with a power transistor, in pacular, a VMOS transistor which is arranged in series with an auxiliary impedance between two switch connection lines. In accordance with the invention, a logic circuit with an OR function and an AND function is used in the realization of a kind of phase angle control for the power transistor in the presence of an activating signal of an initiator at the switch input.

Two-wire switch with a power transistor

The invention relates to a two-wire switch for connecting a load to an ac ltage source, and, in particular, to a two-wire switch with an auxiliary voltage source. A capacitor acting as charge storage device can be charged by the auxiliary voltage source which operates on the principle of phase angle control. In accordance with the invention, a series connection comprising a threshold element which can be brought into the conducting state when there is a prescribed minimum voltage across the capacitor, and a diode is inserted into a control current circuit for a controllable semiconductor device on the input side of the bridge.

Two-wire switch

Proximity switch with continuously operable test circuit responsive to

The invention relates to a testing and evaluating circuit for a proximity itch suitable for testing and provided as an element of a machine control means; associated with the proximity switch is a control circuit, by which the proximity switch is alternately switchable between its two operating conditions to generate a timed output signal with a given frequency, an evaluating circuit being provided, by which a clear signal indicating fault-free operation is producable for the duration of a timed output signal from the proximity switch and by which a blocking signal for the machine control means, indicating a fault, is producable in the absence of changes in the potential of the output signal from the proximity switch. The evaluating circuit preferably comprises a relay circuit, to which the output signal from the proximity switch or a signal derived from this is fed via a transformer.

Growing community of inventors

Ostfildern, Germany

Heinz Kammerer