Position Switches - EUCHNER GmbH + Co. KG - #51

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Position Switches Subject to technical modifications; no responsibility is accepted for the accuracy of this information. 51 Inductive switching elements according to NAMUR These switching elements fulfill the specification IEC 60 947-5-6 and IEC 61 934. The current consumption at UB = 8.2 V is greater than 2.5 mA when the oscillator face is not activated and less than 1.0 mA when the oscillator face is activated. The current consumption characteristic is linear during the transition from the inactivated to the activated state of the oscillator face, i.e. these switches do not have a snap action. Customized versions DC-2-wire switching elements Two-wire switching elements can be used in principle instead of mechanical switches. Their low off-state current makes them especially suitable for use in conjunction with programmable logic controllers. Compared with three-wire switching elements they have the advantage of requiring less wiring. The inductive switching elements are largely protected against external interference by use of various circuit techniques (suppressor circuits). For utilization category DC-13 the output is to be protected with a free-wheeling diode for inductive loads. Short-circuit and overload protection The inductive switching elements are designed so that short circuits cannot damage the outputs. Pulsed short circuit protection is used. This means that the output transistor is switched off and on again in quick succession in the event of overloading or a short-circuit. In this way, it is possible to establish whether the fault is still present or has been rectified. Suppressor circuits Transient protection EUCHNER proximity switches are protected against interference caused by the occurrence of inductive voltage peaks in accordance with IEC 801-4. The respective values are specified in the technical data. Testing is performed in accordance with the stipulations in DIN VDE 0660, Part 208 and IEC 947-5-2. Wire break safety The EUCHNER proximity switches with wire break safety are designed such that on a wire break on any connection, the switch does not output a spurious signal. Reverse polarity protection Protection against reverse polarization of the operating voltage. Increased operating distance For designs with 12 mm proximity switch spacing, switching elements with increased operating distance are available on request (sn = 5 mm). Due to their technical characteristics, these switching elements can be used both with a pulsed operating voltage and an operating voltage that is not pulsed.