Highlights. Opto Proximity Switches. Introduction. Opto proximity switches fast and accurate sensing with light and laser PXO100

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1 Opto proximity switches fst nd ccurte sensing with light nd lser Configurtor A configurtor for opticl proximity switches is vilble in the A&D Mll. Bsed on the technicl fetures required, the desired product cn be quickly nd esily selected, plced in the shopping crt nd ordered. Additionl informtion is vilble in the Internet under: Pure opticl stuteness this is wht distinguishes these extremely precise, quick-cting nd ccurtely pin-pointing opticl proximity switches. This is supplemented by first-clss ese of djustment using tech-in function or potentiometer nd esiest possible hndling during opertion. With the wide rnge of different designs, from cubic to cylindricl right down to miniture designs nd different types, e.g. s diffuse sensors with or without bckground suppression, retroreflective or thru-bem sensors, they mster ny tsk with rnge of up to 50 m superbly. Highlights Extremely precise nd quick-cting with pin-point locting bility Mximum performnce even over lrge distnces Smll, compct enclosure Degree of protection up to IP68 Adjustble rnges Esy commissioning (tech-in) Suitble for globl use (UL/CSA) Appliction The vrious versions of the Opto proximity switches re predominntly used in the following pplictions: In conveyor systems In pckging mchines In mechnicl engineering In pper, textile nd plstics processing In printing mchines For ccess control. These photoelectric sensors detect ll objects regrdless of their composition, whether metl, wood or plstic. Specil versions of the K0 form in miniture enclosure nd the C40 re vilble for detecting trnsprent objects. Specil devices such s the color sensor or color mrk reder cn be used to detect differences in color or contrst. The nlog lser supports extremely precise distnce mesurements nd position monitoring. Sensors for Ex Zone / The K80 ATEX opticl proximity switch is pproved ccording to EU Guideline 94/9/EG (ATEX) Appendix VIII The pprovl is for: Gs EX II 3G EEx na II T6x nd Dust EX II 3D IP65 T 80 C x The functionlity of the opticl proximity switches with ATEX pprovl is identicl to tht of the stndrd proximity switches. Sfety-relted pplictions The use of the sensors is not permissible for pplictions in which the sfety of persons is dependent on the function of the proximity switch. NSD0_00801 PXO series The opticl proximity switches re orgnized in different product fmilies in ccordnce with their technicl type nd design: SIMATIC sensors Version Design PXO100 Cylindricl version, mini D4, M5, M1 PXO00 Cylindricl versions M18, M18S, L18 PXO300 Cubic version, mini K1, K1R, K0, L0, C0 Design The devices cn be mounted in ny position. They should be instlled in such mnner s to prevent dirt deposits s fr s possible. The vilble ccessories enble the devices to be mounted esily nd correctly. Alignment Diffuse sensor The sensor must be ligned with the object to be sensed to ensure relible switching. In devices tht hve surplus light function, the relevnt LED must be ctive. PXO400 Cubic version, smll K31, K30 PXO500 Cubic version C40, L50, L50HF, L50HF dv., C50 PXO600 Cubic version, lrge K80, L80HF, L90L PXO800 Specil device mplifiers GL, LV70 /70 Siemens FS

2 Retroreflective sensors Plce the reflector t the required loction nd secure it firmly. Cover the reflector with dhesive tpe so tht only the center (pproximtely 5% of the surfce) remins free. Instll the retroreflective sensor so tht it switches relibly. Finlly remove the dhesive tpe from the reflector. Thru-bem sensors Plce the receiver in the required position nd secure it firmly. Align the emitter with the receiver s ccurtely s possible. Minimum clernce The proximity switches must not interfere with ech other. Therefore minimum distnce must be observed between two sensors. The following distnces re recommended vlues only. The vlues given re for mximum sensitivity. NSD00795 Diffuse sensor NSD00796 Retroreflective sensor NSD00797 Setting the operting distnce Sensitivity is either djusted using built-in potentiometer or tught by mens of tech-in function. When potentiometer is used, turning clockwise increses sensitivity nd thus the chievble operting distnce. Diffuse sensor nd diffuse sensor with bckground suppression The object is positioned in front of the sensor inside its sensing rnge. Set the sensitivity, or distnce, in such wy tht the object to be scnned is sure to be sensed. If necessry, the surplus light disply (green LED) must be ctive. The object must then be removed. If the output remins on, sensitivity must be reduced. In devices with tech-in function, sensitivity is djusted utomticlly. During this process, the sensor is tught the two sttes "Object there" nd "Object not there" by pressing the keys. Retroreflective sensors nd thru-bem sensors In norml cses, the sensor is lwys operted with sensitivity t mximum. This produces the mximum surplus light. It is usully only necessry to reduce sensitivity for sensing very smll or trnsprent objects. The procedure is the sme s for diffuse sensors. length Long cbles between the devices result in: Additionl cpcitive loding (short-circuit protection) Incresed injection of interference. For this reson the specified mximum cble length must not be exceeded. Function Diffuse sensor (energetic sensor) The light from the emitter flls on n object nd is reflected in diffuse pttern. Prt of this reflected light reches the receiver locted in the sme device. If the intensity of the received light is sufficient, the output is switched. The sensing rnge depends on the size nd color of the object involved s well s its surfce texture. The sensing rnge cn be vried within wide rnge by mens of the built-in potentiometer. The energetic sensor cn therefore lso be used to detect different colors. Thru-bem sensor Opto proximity switches D4/M5 M1 M18 K31 K30 K80 L18 (lser light brrier) L50 (lser light scnner) L50 (lser light brrier) C50 (color sensor) 1) Focusing t 50 m. Dimension 50 mm 50 mm 50 mm 50 mm 750 mm 500 mm 150 mm 1) 30 mm 80 mm 500 mm Diffuse sensor with bckground suppression Diffuse sensors with bckground suppression cn detect objects up to specific sensing rnge. All objects beyond this rnge re suppressed. The focus level cn be djusted. The bckground is suppressed due to the geometric constelltion between the emitter nd the receiver. Siemens FS /71

3 Retroreflective sensors The light from the emitter diode is focused through lens nd directed vi polriztion filter to reflector (principle of 3-wy mirror). Prt of the reflected light psses through nother polriztion filter nd reches the receiver. The filters re selected nd ligned in such wy tht only the light reflected from the reflector reches the receiver nd not the light reflected from other objects within the bem rnge. An object tht interrupts the light bem from the emitter through the reflector to the receiver cuses the output to switch. Lser diffuse sensor with nlog output The nlog lser proximity switch cn mesure the exct distnce of n object within its sensing rnge. Due to the use of visible lser light, the mesurement is highly ccurte nd the output is extremely liner. All lser proximity switches belong to sfety clss, i.e. they re hrmless nd cn be used without ny risk to helth (e.g. to the eyes). Thru-bem sensors Thru-bem sensors comprise n emitter nd receiver. The emitter is ligned in such wy tht the gretest possible mount of pulsed light from the emitter diode reches the receiver. The receiver evlutes the incoming light to clerly seprte it from the mbient light nd other light sources. Any interruption of the light bem between emitter nd receiver cuses the output to switch. Color sensors The color sensor functions with n incndescent LED, which illumintes the object. During sensor djustment, the light reflected from the object is mesured nd ssigned to the pproprite output. The recognized color is stored in the device in non-voltile memory, nd is immeditely vilble even when the sensor hs been switched off nd on gin. Either three independent colors or one color scle cn be sved nd evluted. The mesured color vlue (RGB) is not vilble. Color mrk sensor The color mrk sensor uses green or red emitted light. The color is selected utomticlly depending on the contrst. The mrk color nd the bckground color cn be set seprtely by mens of two keys. Devices for fiber-optic conductors Opticl fibers re fitted in front of the emitter nd receiver. They represent the "extended eye" of the Opto proximity switch. As opticl fibers re very smll nd flexible, they provide prcticl solution to the problem of sensing t points tht re not esily ccessible. Furthermore no electricl potentil is trnsferred. /7 Siemens FS

4 Technicl specifictions The tble lists dt which re independent of the design Type Solid-stte output Solid-stte output Devices with lser Voltge drop t 00 ma V Mx..0 Mx..4 Operting cpcity ma Mx Mx. 00 Reverse current of outputs ma Mx. 0.1 Mx. 0.1 Power-up dely ms Mx. 0 Mx. 300 Mx. 300 Hysteresis (typicl) 10% 10% 5% for diffuse sensors Repet ccurcy 5 % of operting distnce for diffuse sensors Ambient light limit Sunlight Lux Hlogen light Lux Precutions Overlod protection Overvoltge protection Short-circuit protection Bck-up fuse required Permissible cble length m Mx. 50 Mx. 50 Mx. 100 For further technicl specifictions, see the respective type Schemtics Block digrm 1 Block digrm + U b BN Type A, C, D 4 4 NSD BU (3) switching nlog Block digrm 3 Block digrm 4 Type B 3 WH () Output drk-on 3 WH () Output light-on 1 4 BU (3) 1 4 BU (3) NSD00868b NSD00873 NSD00874 (1) 1 3 BU (3) Enble input Output surplus light Output light-on Type A, C, D Type B, 4-pole Block digrm 5 Block digrm 6 M1 connector, Type F, K, L 1 WH () Output drk-on 1 WH () Output light-on BU (3) BU (3) NSD NSD00875 Output surplus light Output light-on/drk-on M1 connector, Type F, K, L Block digrm 7 Block digrm 8 M1 connector, Type E, F, H, J, K, L WH () 1 1 Enble input BU (3) BU (3) GR (5) NSD Block digrm 9 Block digrm 10 + U M1 connector, b Type E, F, H, J, K, L, M 1! " BU (3) # NSD00871 Block digrm 11 Block digrm 1 Screw-type terminls WH () Output surplus light 1 Output light-on/drk-on BU (3) GR (5) Enble input BU (3) NSD00878 NSD , & % NSD00879 Output surplus light Output light-on/drk-on Enble input 7 # $ " 8 + = = C I M EJ? D E C Output light-on/drk-on M1 connector, Type G, M Screw-type terminls M1 connector, Type E, F, H, J, K, L, N Siemens FS /73

5 Block digrm 13 Block digrm 14 M1 connector, Type E, F, H, J, K, L, N 4 WH () 1 WH () Output light-on/drk-on BU (3) 1 3 BU (3) NSD00886 Block digrm 15 Block digrm 16 BN 1 WH + U 1 YE _ U 1! 8 GN! " 1 " Shielding NSD00894 FS10_0007 Block digrm 17 Block digrm BN () +Ub WH (1) Blnking GR (5) Interlock PK (6) Output 3 RD (8) YE (4) Output GN (3) Output 1 BU (7) M1 connector, 8-pole, Type O Block digrm 19 Block digrm 0. 5 $ "! " * 9 0 * 7! * " / ; # 7 > K JF K J) EC D = H 8 K JF K J) EC D = H ) = C K JF K J" ) ) M1 connector, Type F, G NSD , #. 5 $!. 5 " ' $ % &! # " * 9 0 * 7 * 4 +U b DC Progrmming Switching output light-on/drk-on 7 > H C H= E C 5 M EJ? D E C K JF K J EC D = H 7 >, +! 8 H C H= E C 8 * " & # / " & # # $ 4, & ; - " /! * 7 ` % 5 M EJ? D E C K JF K JEC D = H ) = C K JF K J 8 Type B, 4-pole M1 connector, Type G, M M8 socket connector, Type O, 8-pole BK = blck BU = blue OR = ornge WH = white PK = pink BN = brown GR = gry RD = red YE = yellow GN = green GY = gry /74 Siemens FS

6 Chrcteristic curves Types of construction D4 nd M5 Diffuse sensor Thru-bem sensor Type of construction M1 Diffuse sensor Retroreflective sensor Thru-bem sensor Type of construction M18 Diffuse sensor Retroreflective sensor Thru-bem sensor Siemens FS /75

7 Types of construction K30 nd K31 Diffuse sensor Retroreflective sensor Thru-bem sensor S (m) NSD00904 S (m) 4,0 NSD , S 3,0 S 0,9 0,6 0,3,0 1, (mm) Series K30 Series K (mm) Series K30 Series K31 Type of construction K80 Diffuse sensor Retroreflective sensor Thru-bem sensor /76 Siemens FS

8 More informtion Glossry for opticl proximity switches Terms ssocited with the technology of photoelectric proximity switches re explined below. Some of the terms re defined in IEC Anti-interference function This function prevents mutul interference between opto proximity switches. The specified clernces between the devices does not hve to be observed for devices with n nti-interference function. It is therefore possible to lign two reflex sensors, for exmple, with common reflector. Function of the outputs Drk-ON The "drk-on" function mens tht this output is conducting (current-crrying) when no light reches the receiver. Light-ON The "light-on" function mens tht this output is conducting (current-crrying) when light reches the receiver. Antivlent The devices with ntivlent output hve outputs. One output is drk-on, nd the other is light-on. Surplus light As n lterntive, some devices cn be supplied with different configurtion of outputs, one output light-on nd the other for signling the surplus light. Output current The devices re designed for mximum output current (rted operting current, see Technicl specifictions). If this current is exceeded, even briefly, the built-in overlod nd short-circuit protection will be ctivted. Destruction of the device is effectively prevented. Incndescent lmps, cpcitors nd other strongly cpcitive lods (e.g. long leds) hve similr effect to n overlod. A minimum lod current (smllest operting current) is not required. A built-in pull-up resistor ensures tht n output signl is lwys vilble. Auto-collimtion With these devices, the opticl xes of the emitter nd receiver re identicl. The device only hs one opticl xis. This mens tht there is no blind zone rnge in front of the proximity switch nd the ccurcy of the switching point is higher. Spurious signl suppression The devices feture spurious signl suppression. It prevents the occurrence of spurious signls from the moment of ppliction of the operting voltge until the moment when the device is redy for opertion (pproximtely 5 ms). Sensing rnge The sensing rnge is the rnge within which the operting distnce cn be set. This term replces ny other previously used terms (sensing rnge/trnsmission rnge). Correction fctors The specified sensing rnges of diffuse sensors re chieved with the specified surfces by using mtte white stndrd pper. The following correction fctors (pproximte vlues) pply to other surfces: Test crd 100 % Blck neoprene 0 % White pper 80 % Automobile tires 15 % Light-colored wood 73 % Sheet luminum White plstic 70 % rw 00 % Cork 65 % blck, nodized 150 % Printed newspper 60 % mtte (brushed) 10 % PVC, gry 57 % Stinless steel, polished 30 % Blck plstic % Enbling input With opto proximity switches with test input, the emitter cn be switched on or off. Function monitoring cn be implemented with pproprite evlution of the output signl (light brrier: no obstruction of light bem / diffuse sensors: reflecting object exists). To disble the proximity switch, the enbling input must be connected to. The enbling input does not hve to be used for opertion. Ambient light limit Ambient light is the light produced by externl light sources. The luminescence level is mesured on the light incidence surfce. Thnks to the use of modulted light, the devices re insensitive to mbient light. There is, however, n upper limit for the intensity of ny externl light which is referred to s the mbient light limit. It is specified for sunlight (unmodulted light) nd hlogen light (light modulted t twice the frequency of the electricity supply). Relible opertion is not possible bove the relevnt mbient light limit. Siemens FS /77

9 Integrtion Sensors nd PLCs re growing together Thnks to intelligent linking to the PLC, IQ-Sense cn now be used to implement significntly more flexibility nd relibility of the sensors. The uniform exchnge of dt presents gret number of dvntges for plnt construction s well s for its opertion. For exmple, the new IntelliTech function permits mchine nd plnt constructors to chieve fst commissioning, since ll settings for the IQ-Sense devices cn be mde using the PLC. Vlues set once on sensor cn be trnsmitted to other sensors without problem. Sensors cn be exchnged during opertion without ny extr work since the PLC utomticlly reestblishes ll sensor settings. Furthermore, IQ-Sense permits chnnel-specific system dignostics. Wire brek, short-circuit, mldjustment or module/ sensor filure re utomticlly signled, nd prmeteriztion errors re voided. It is therefore possible to reduce downtimes nd to increse plnt vilbility. Benefits Configurtion with STEP 7 Communiction between sensor nd SIMATIC PLC over lowcost two-core cble Sensor prmeteriztion through the control (IntelliTech) System dignostics down to single sensor reduces downtimes Replcement of sensors during opertion without re-prmeteriztion Connectble proximity switches to ET 00S vi 4 IQ-Sense module to S7-300/ ET 00M vi 8 x IQ-Sense module Opto K80 Retroreflective sensor Retroreflective sensor with bckground suppression Diffuse sensor Opto C40 Retroreflective sensor Diffuse sensor WinCC visuliztion Industril Ethernet Engineering STEP7 S7-300/ET 00M PROCESS FIELD BUS PROFIBUS DP ET 00S Proximity switches with IQ-Sense Opto Opto or Sonr Integrtion of IQ-Sense into the utomtion environment /78 Siemens FS