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Speed and Frequency

Seite1 von 6 TheVarious Series and their Range of ApplicationSeries A5S05… A5S09…

Sensors - 38502 Differential-Hall-Effect based SensorsSeries A5S…

Appropriate for any speed detection,unlesstheapplication has a special requirement as listed below. Series A5S10… A5S13… Speed Detection within Explosion Hazardous areas. These sensors are intrinsically safe when connected to our barrier units D461. No further precautions required in the Ex-area,with installation and cabling. OutstandingCharacteristics

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Speed range covering most demands:from close to zero up to 25,000 pulses/second(response time

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Accepting fine and coarse profiles, as gear wheels, slots, cams, holes in any ferrous material,

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Clearance to the rotating part up to 4 mm (depending on the pro-file size),

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Temperature range – 40 °C …+ 125 °C (- 40 …+255 °F),

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Differential principle hinders the influence of external magnetic fields and of machine vibration,

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Sealed stainless steel enclosure (1.4305) with protection grade IP67 and allowing > 200 bar pressure to sensor tip. Available for connection via tight plug, or with firmly attached cable (standard or Teflon insulated),

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Series A5S14… A5S17… Powerful square wave output signal equally high over the entire speed range. Level approximately that of the supply voltage. Ade- quatefor signal transmission over more than 500 meters. For speed and direction sensing as A5S30… A5S33…, but underintrinsically safety requirements for Ex-hazardous areas. Installation, profile size, and clearance to target Flushplacement into any material, close to an other sensor.The allowed clearance (gap) to the target depends on its size: withthe smallest detectable profile size of module0,8 (pitch 30) it is <1mm, a profile size of module 4 (pitch 6) or more allows a maximumgap of nearly 4 mm. Note: An ambient temperature of > 90 °C or 10 kHz reduces the maximumgap by approx. 20 %. The advantageous differential principle requires adjustment of the sensorto as position approximately parallel (± 20 °) to the target pro-file edges, as indicated by its wrench planes. See Operating Instruc-tions for details. Series A5S40… A5S43… Providing 2 phase-shifted speed pulse trains, for a separate directiondetection with failure detection.Eachseries includes several differing dimensions and connection modes, but all with the same functional characteristics.For details and ordering Nos. see thefollowing pages. Pleasepay special attention to theapplicationnotesat the end of this section.Function Principle Connection Modes All A5S.. sensors are available with a hardwired cableattached,orwith a socket accepting plug-in connectors. This is the easier way to handle a long cable. Such can be provided in standard (up to 85 °C) or high temp (up to 125 °C)Teflon quality. Withastraight or angular plug,in metallic or plastic enclosure, all tight to IP 67. Or, the con-nectors only.Forduty under liquidshowever, orwithnarrow space applications,thefirm cable is the better choice. Available with both insulation qualities, and any requested length. Profile motion The Hall effect (named for its discoverer) utilizesthefact, that a magnetic field may generate a voltage within a semi-conductor. And doesthis independent of its rate of change (i.e. speed of motion) -unlike the induction effect of magnetic pick-ups, which relyon the rate and therefore are weak at low speed.The sensors A5S… includethe necessary magnet (M)and the hall element chip (E). With the profile passing by, the magnetic field var-ies, therebycreating thesignal voltage within the chip.Here it is im-portant to keep in mind, that the signal does not fade at low speed. The Differential Hall Effect Principle Itengages a twin chip hall element, and the signal amplifier (V)usesonly the difference between both. It is thenamplified to provide the powersquare wave output. profile ontar g et

sensor A5S...

Its Advantages: By its nature, this differential principle compensates target vibrations.And it balances an external magnetic field. Both important aspects for a reliable signal.

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PowerOutput Braun GmbH ISO 9001 certified QualityPost-Office Box 1106 • D-71301 WaiblingenPhone: +49(0) 7151 / 95 62-30 ? Fax: +49(0) 7151 / 9562-50 ? eMail: info@braun-tacho.de Internet: www.braun - tacho.de