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Info card Operating voltage The voltage range in which the ...

UKInfo cardInductive sensorsHysteresisDifference between the switch-on and the switch-off protectionifm sensors which are protected against excessive current by means of a pulsed short-circuit protection. The inrush current of incandescent lamps, electronic relays and low resistance loads may cause this protection to cut in and turn the sensor off!Standard targetSquare-shaped steel plate ( S235JR) of a thickness of 1 mm with a side length equal to the diameter of the sensing face or 3 x Sn, depending on which value is the standardIEC 60947-5-2 RepeatabilityDifference between any two Sr measurements. Max. 10 % of currentCurrent for the internal supply of 2-wire units; also flows through the load when the output is point driftThe shifting of the switch point owing to changes in the ambient frequencyDamping with standard target at half Sn.

UK Info card Inductive sensors 5 6 Electrical connection The unit must be connected by a qualified electrician. ①Use a miniature fuse according to the technical data sheet, if specified. Recommendation: Check the safe functioning of the unit after a short circuit.

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Transcription of Info card Operating voltage The voltage range in which the ...

1 UKInfo cardInductive sensorsHysteresisDifference between the switch-on and the switch-off protectionifm sensors which are protected against excessive current by means of a pulsed short-circuit protection. The inrush current of incandescent lamps, electronic relays and low resistance loads may cause this protection to cut in and turn the sensor off!Standard targetSquare-shaped steel plate ( S235JR) of a thickness of 1 mm with a side length equal to the diameter of the sensing face or 3 x Sn, depending on which value is the standardIEC 60947-5-2 RepeatabilityDifference between any two Sr measurements. Max. 10 % of currentCurrent for the internal supply of 2-wire units; also flows through the load when the output is point driftThe shifting of the switch point owing to changes in the ambient frequencyDamping with standard target at half Sn.

2 The ratio damped to un-damped (tooth to gap) = 1 : consumptionCurrent for the internal supply of 3-wire DC of soiling inductive proximity sensors are designed for degree of soiling range (referred to the standard target)Sn+ 10 %+ 10 %- 10 %- 10 %SrSuminSumaxSaNominal sensing range sn= characteristic value of the unitReal sensing range sr= individual deviation at room temperature between 90 % and 110 % of SnUseful sensing range su= switch point drift between 90 % (Sumin = Sa) and 110 % (Sumax) of SrReliable sensing range = Operating distance Sa:= reliably switched between 0 % and 81 % of SnSafe switch-off distance= Sumax + max. hysteresis = 143 % of Sn This info card is to be regarded as a supplement to the main position sensors catalogue and to the in-dividual data sheets. For further information and contact addresses please visit our homepage at principle of an inductive proximity switchCoil and capacitor form an LC reso-nant circuit, also called basic sensor .

3 Eddy current losses in electrically-conductive materials are used for a switching : Connection2: Housing3: Downstream electronics4: Capacitor5: Pot core6: Coil7: Alternating electromagnetic field = active zone8: Target = electrically conductive materialImportant GlossaryActive zone / active face Area above the sensing face in which the sensor reacts to the ap-proach of the functionNormally open:object within the active zone > output is closed:object within the active zone > output is :choice between normally closed or normally switching: positive output signal (to L-).Negative switching: negative output signal (to L+).Rated insulation voltage AC units depending on UB: 140 V AC or 250 V ACDC units with protection class II: 250 V ACDC units with protection class III: 60 V DCRated short-circuit currentfor short-circuit-proof units: 100 ARated impulse withstand voltageAC units depending on UB: 140 V AC = kV or 250 V AC = 4 kV( overvoltage category III)DC units with protection class II: 4 kV ( overvoltage category III)DC units with protection class III: 60 V DC kV ( overvoltage category II)Power-on delay timeThe time the sensor needs to be ready for operation after application of the Operating voltage (in the millisecond range ).

4 Operating voltageThe voltage range in which the sensor functions reliably. A stabili-sed and smoothed direct voltage should be used! Take into account residual ripple!Utilisation categoryAC units: AC-140 (control of small electromagnetic loads with holding currents < 200 mA)DC units: DC-13 (control of solenoids)1 D 2226 / 04 10 / 2014 UKInfo cardInductive sensorsCorrection factorsV2A100Sr [%]500 AlMsCu** Standard targetValues data sheetException K1 units: Same sensing range for allInfluence of the target size100Sr [%]5000,20,51,0x axis: ratio actual target / standard targetLateral approach and ranges (valid for structural steel, S235JR)0 SnaTypical switch-on curve (for slow approach)Typical switch-off curve (for slow approach)Poor repeatabilityGood repeatabilityGood repeatability of the switch point means: The closer the target is positioned to the sensing face, the better.

5 General recommendation: a = 10 % of the nomi-nal sensing range d d 6Q [6Q1 GDistance to the backgroundRecommended target distanceRecommended degree of coverage of the sensing faceRecommended target sizeTips on flush and non-flush mounting in metalInstallation instructions cylindrical designsFlush: Non-flush:2 x SnInstallation instructions rectangular designsFlush:Non-flush:ha2xa2xaha1,5xah = anyaa2xa2xaaa1,5xa If the required clear space is not observed for non-flush units, the sensor is predamped. This may lead to permanent switching. Possibly deviating installation instructions for rectangular units with increased sensing range Notes on mounting and cardInductive sensorsParallel connection (OR)+UB0 VParallel connection 3-wire unitsThe current consumption of all non-switched units adds up. The units can be used in combination with mechanical connection 2-wire unitsNot possible.]

6 Use a miniature fuse according to the technical data sheet, if specified. Recommendation: Check the safe functioning of the unit after a short circuit. Negative switching sensor 1 Positive switching sensor nConfiguration of cables and connectorsColours: BK: black, BN brown, BU: blue, WH: whiteStandard configuration for 3-wire DC:CableTerminal chamberUS-100 plugL+BN1 / 3 Pin 1 / BNL BU2 / 4 Pin 3 / BUOutputBKXPin 2 / WHPin 4 / BKPin connection of the US-100 connections (view onto the plug of the unit)Pin 4: BKPin 1: BNPin 3: BUPin 2: WHFor the cable and the pin configuration as well as the unit data of spe-cial versions please refer to the wiring diagrams in our main catalogue for position clearance for installing units of the same type (side-by-side installation)Applies to cylindrical and rectangular :Non-flush:8 x Sn2 x Sn Side-by-side installation only possible with different oscillator systems+UB / L10 V / N+UB0 V+UB0 VTwo-wire technology(negative or positive switching)3-wire technology(negative or positive switching)4-wire technology(positive switching, normally closed and normally open)Series connection (AND)+UB0 V+UB / L1U1 UnUL0 V / NSeries connection of 3-wire unitsMax.

7 4 units. Power-on delay times, voltage drops and current consumptions add up. UB min ( sensor ) and UHIGH min (load) must remain connection of 2-wire unitsNot recommended because of undefined operation when blocked! Use special types which can be connected in series (max. 2 units). voltage drops add up.


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