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| long-distance type e2k-c adjustable long-distance sensor detects both metallic and nonmetallic objects (water, plastic, etc.). ce marking for dc 3-wire an d ac/dc 2-wire models. noise-resistant mode ls added to the lineup for application in a wide range of industrial environments. be sure to read safety precautions on page 7. ordering information sensors accessories (order separately) mounting brackets appearance sensing distance model output configuration operation mode no nc standard models dc 3-wire, npn e2k-c25me1 e2k-c25me2 ac 2-wire e2k-c25my1 e2k-c25my2 noise-resistant models dc 3-wire, npn e2k-c20mc1 e2k-c20mc2 ac/dc 2-wire e2k-c20mt1 e2k-c20mt2 34 dia. unshielded 3 to 25 mm 3 to 20 mm appearance model quantity remarks y92e-a34 1 provided with the product. http://www.ia.omron.com/ 1 (c)copyright omron corporation 2007 all rights reserved.
e2k-c ratings and specifications standard models * the set distances are sensing distances applicable to standard sensing objects. refer to engineering data on page 4 for other materials. item model e2k-c25me1 e2k-c25me2 e2k-c25my1 e2k-c25my2 sensing distance * 25 mm sensing area 3 to 25 mm detectable object conductors and dielectrics standard sensing object grounded metal plate: 50 ? 50 ? 1 mm differential travel 15% max. of sensing sensing distance (when adjusted to 25 mm ? 10% with standard sensing object) response frequency 70 hz 10 hz power supply voltage (operating voltage range) 12 to 24 vdc (10 to 40 vdc), ripple (p-p): 10% max. 100 to 220 vac (90 to 250 vac), 50/60 hz current consumption e models: 10 ma max. at 12 vdc, 16 ma max. at 24 vdc leakage current y models: 1 ma max. at 100 vac (50/60 hz) with output turned off, 2 ma max. at 200 vac (50/60 hz) with output turned off con- trol out- put load current 200 ma max. 5 to 200 ma (resistive load) residual voltage 2 v max. (load current: 200 ma, cable length: 2 m) refer to engineering data on page 4. indicators detection indicator (red) operation indicator (red) operation mode (with sensing object approach- ing) e1/y1 models: no e2/y2 models: nc protection circuits reverse polarity protection, surge suppressor surge suppressor ambient temper- ature range operating/storage: 25 to 70 ? c (with no icing or condensation) ambient humidity range operating/storage: 35% to 95% (with no condensation) temperature influence ? 15% max. of sensing distance at 23 ? c in the temperature range of 10 to 55 ? c ? 25% max. of sensing distance at 23 ? c in the temperature range of 25 to 70 ? c voltage influence ? 2% max. of sensing distance at the rated voltage in rated voltage ?15% range ? 2% max. of sensing distance at the rated voltage in rated voltage +20%, 10% range at 100 vac, ? 20% range at 200 vac insulation resistance 50 m : min. (at 500 vdc) between current-carrying parts and case dielectric strength 1,000 vac, 50/60 hz for 1 min between current-carrying parts and case 1,500 vac, 50/60 hz for 1 min between current-carrying parts and case vibration resistance destruction: 10 to 55 hz, 1.5-mm double amplitude for 2 hours each in x, y, and z directions shock resistance destruction: 500 m/s 2 10 times each in x, y, and z directions degree of protection iec 60529 ip66 connection method pre-wired models (standard cable length: 2 m) weight (packed state) approx. 200 g mate- rials case heat-resistant abs sensing surface accessories mounting bracket, instruction manual refer to the timing charts under i/o circuit diagrams on page 5 for details. http://www.ia.omron.com/ 2 (c)copyright omron corporation 2007 all rights reserved. e2k-c noise-resistant models *1. the set distances are sensing distances applicable to standard sensing objects. refer to engineering data on page 4 for other materials. *2. the response frequency is an average value. *3. only 2-m cables are available. use a cable with a conductor cross section of 0.5 mm 2 or greater to extend the cable. item model e2k-c20mc1 e2k-c20mc2 e2k-c20mt1 e2k-c20mt2 sensing distance * 1 20 mm sensing area 3 to 20 mm detectable object conductors and dielectrics standard sensing object grounded metal plate: 50 u 50 u 1 mm differential travel 15% max. of sensing distance (when adjusted to 20 mm r 10% with standard sensing object) response frequency * 2 40 hz ac power: 25 hz, dc power: 40 hz power supply voltage (operating voltage range) 12 to 24 vdc (10 to 36 vdc), ripple (p-p): 10% max. 24 to 240 vac (20 to 250 vac), 50/60 hz; 24 to 240 vdc (20 to 250 vdc) current consumption 13 ma max. at 24 vdc --- leakage current --- 1.5 ma max. at 24 vdc, 1.7 ma max. at 110 vac (50/60 hz), 2.5 ma max. at 250 vac (50/60 hz) refer to engineering data on page 4. con- trol out- put load current 250 ma max. 5 to 200 ma (resistive load) residual voltage 2.5 v max. (load current: 250 ma, cable length: 2 m) ac power: 10 v max., dc power: 8 v max. refer to engineering data on page 4. indicators operation indicator (yellow) operation mode (with sensing ob- ject approach- ing) c1/t1 models: no c2/t2 models: nc protection circuits reverse polarity protection, load short-circuit protection --- ambient temper- ature range operating/storage: 25 to 70 q c (with no icing or condensation) ambient humidity range operating/storage: 35% to 95% (with no condensation) temperature influence r 15% max. of sensing distance at 23 q c in the temperature range of 10 to 55 q c r 25% max. of sensing distance at 23 q c in the temperature range of 25 to 70 q c voltage influence r 2% max. of sensing distance at the rated voltage in rated voltage r 15% range insulation resistance 50 m : min. (at 500 vdc) between current-carrying parts and case dielectric strength 1,000 vac, 50/60 hz for 1 min between current-carrying parts and case 1,500 vac, 50/60 hz for 1 min between current-carrying parts and case vibration resistance destruction: 10 to 55 hz, 1.5-mm double amplitude for 2 hours each in x, y, and z directions shock resistance destruction: 500 m/s 2 10 times each in x, y, and z directions degree of protection iec 60529 ip65 connection method * 3 pre-wired models (standard cable length: 2 m) weight (packed state) approx. 240 g mate- rials case pbt sensing surface accessories mounting bracket, instruction manual refer to the timing charts under i/o circuit diagrams on page 5 for details. http://www.ia.omron.com/ 3 (c)copyright omron corporation 2007 all rights reserved. e2k-c engineering data (typical) common mode continuous noise sensing distance change by sensing object e2k-c20m e2k-c25m @@ e2k-c20m @@ residual output voltage leakage current e2k-c25my at 100 vac e2k-c25my at 200 vac e2k-c25my e2k-c20mt at 100 vac e2k-c20mt at 200 vac e2k-c20mt 10 1 0 20 40 60 100 80 160 140 120 1000 100 e2k-c20m frequency (khz) omron product ( e2k-c25m) noise voltage (vp-p) 10 15 20 25 0 5 distance x (mm) standard sensing object (50 50 t1) 500 ml milk (pure water) flour sugar salt phenolic resin (50 50 50) neoprene rubber (50 50 t5) glass (200 50 t3) lavan plate (160 120 t15) resin pellet (duracon) 0 5 10 15 20 25 distance x (mm) s tandard sensing object (50 50 t1) 5 00 ml milk (pure water) flour sugar salt phenolic resin (50 50 50) neoprene rubber (200 50 t3) glass (200 50 t3) lavan plate (160 120 t15) resin pellet (duracon) 20 30 40 50 60 70 80 90 100 1 0 10 20010050 105 off 100 vac a on v residual output voltage residual load voltage load load current (ma) load voltage (v) 1 0 50 100 150 200 20010050 105 off 200 vac a on v load voltage (v) load residual load voltage residual output voltage load current (ma) 80 0 0.5 1.0 1.5 2.0 2.5 3.0 260240220200180160140120100 a v power supply voltage (v ) off leakage current (ma) 1 0 10 20 30 40 50 60 70 80 90 100 250 20010050 510 off 100 vac on v a load current (ma) load residual output voltage residual load voltage load voltage (v) 0 50 100 150 200 1 off 250 20010050 510 200 vac on v a load residual output voltage load current (ma) residual load voltage load voltage (v) 5020 0 0.5 1.0 1.5 2.0 2.5 250 200 150 100 a v power supply voltage (v) ac power off dc power leakage current (ma) http://www.ia.omron.com/ 4 (c)copyright omron corporation 2007 all rights reserved. e2k-c i/o circuit diagrams dc 3-wire models sensing area (grounded metal plate) sensing object size vs. sensing distance sensing area e2k-c25m @@ e2k-c25m @@ e2k-c20m @@ 5 0 10 15 50 ? 510 ?10 15 ?15 20 ?20 25 ?25 5 mm 10 mm 15 mm 20 mm 25 mm 20 25 30 x sensing head standard sensing object sensitivity adjustment sensing head distance y (mm) distance x (mm) 2010 0 5 10 15 20 25 30 x 10090807060504030 side length of sensing object (mm) grounded metal plate ungrounded metal plate (1 t) phenolic resin plate (6 t) square sensing object distance x (mm) 0 5 10 15 ?15 ?20 20 30 25 35 5 010 ?51 5 ?10 20 y x sensing head standard sensing object distance y (mm) sensing head sensing distance x (mm) operation mode model timing chart output circuit no e2k-c25me1 nc e2k-c25me2 no e2k-c20mc1 nc e2k-c20mc2 present not present operate reset high low on off load (between brown and black leads) output voltage (between black and blue leads) detection indicator (red) sensing object tr 0 v +v 4.4 k proximity sensor main circuit load brown black *1 output *2 blue *1. load current: 200 ma max. *2. when a transistor is connected. present not present operate reset high low on off load (between brown and black leads) output voltage (between black and blue leads) detection indicator (red) sensing object sensing object (between brown and black leads) operation indicator (yellow) load present not present operate reset on off 12 to 24 vdc 0 v * * load current: 250 ma max. proximity sensor main circuit load brown blue black sensing object operation indicator (yellow) load present not present operate reset on off (between brown and black leads) http://www.ia.omron.com/ 5 (c)copyright omron corporation 2007 all rights reserved. e2k-c ac 2-wire models ac/dc 2-wire models operation mode model timing chart output circuit no e2k-c25my1 nc e2k-c25my2 operation mode model timing chart output circuit no e2k-c20mt1 nc e2k-c20mt2 present not present operate reset on off load operation indicator (red) sensing object brown blue load proximity sensor main circuit present not present operate reset on off load operation indicator (red) sensing object sensing object operation indicator (yellow) load present not present operate reset on off 24 to 240 vac 24 to 240 vdc 0 v brown* blue load * load current: 200 ma max. proximity sensor main circuit present not present operate reset on off load operation indicator (yellow) sensing object http://www.ia.omron.com/ 6 (c)copyright omron corporation 2007 all rights reserved. e2k-c safety precautions refer to warranty and limitat ions of liability . this product is not designed or rated for ensuring safety of persons either directly or indirectly. do not use it for such purposes. do not use this product under ambient conditions that exceed the ratings. design influence of surrounding metal when mounting a proximity sensor, be sure to provide a distance of 80 mm min. from surrounding metal objects to prevent the sensor from being affected by metal objects other than the sensing object. when mounting the sensor with the l-shaped mounting bracket, be sure to provide a distance of 20 mm min. between the face of the sensing head and the mounting bracket. mutual interference when installing sensors face-to-face or side-by-side, ensure that the minimum distances given in the following table are maintained. mutual interference (unit: mm) effects of a high-frequency electromagnetic field the e2k-c may malfunction if there is an ultrasonic washer, high- frequency generator, transceiver, portable telephone or inverter nearby. for major measures, refer to noise of warranty and limitations of liability for photoelectric sensors. sensing objects x sensing object material the e2k-c can detect almost any type of object. the sensing distance of the e2k-c, however, will vary with the electrical characteristics of the object, such as the conductance and inductance of the object, and the water content and capacity of the object. the maximum sensing distance of the e2k-c will be obtained if the object is made of grounded metal. x indirect detection to detect objects in metal containers, each metal container must have a nonmetallic window. power on conditions sensing is enabled within 200 ms for the e2k-c20m . design the system so that the power for the sensor is turned on before the power for the load. miscellaneous organic solvents the sensor has a case made of heat-resistant abs resin or pbt resin. be sure that the case is free from organic solvents or solutions containing organic solvents. warning precautions for correct use dimension a b model e2k-c25m 100 100 e2k-c20m 105 20 mm min. 80 mm min. 80 mm min. 80 mm min. 80 mm min. metal be sure to ground. sensing surface surrounding conductive objects surrounding conductive objects b a face-to-face mounting parallel mounting http://www.ia.omron.com/ 7 (c)copyright omron corporation 2007 all rights reserved. e2k-c dimensions (unit: mm) sensors accessories (order separately) e2k-c25m @@ e2k-c20m @@ 20 34 dia. 82 7 13 + - cap cable clamp screw hole for sensitivity adjustment indicator* e models: 6-dia. vinyl-insulated round cable with 3 conductors (conductor cross section: 0.5 mm 2 , insulator diameter: 1.9 mm), standard length: 2 m y models: 6-dia. vinyl-insulated round cable with 2 conductors (conductor cross section: 0.5 mm 2 , insulator diameter: 1.9 mm), standard length: 2 m * e models: detection indicator (red) y models: operation indicator (red) 81 18 9 34 dia. c models: 5.5-dia. vinyl-insulated round cable with 3 conductors (conductor cross section: 0.5 mm 2 , insulator diameter: 1.5 mm), standard length: 2 m t models: 5.5-dia. vinyl-insulated round cable with 2 conductors (conductor cross section: 0.5 mm 2 , insulator diameter: 1.5 mm), standard length: 2 m sensitivity adjuster operation indicator (yellow) mounting bracket (accessory) y92e-a34 material: polyacetal note: provided with the product. 42 r2.6 5.2 43 45 54.4 6.3 15 23.5 2 35 30 14 51 57.6 45 30 6 35 e2k with mounting bracket attached * the holes are not drilled completely through. drill through the holes before using them. sensor mounting hole two, 5.5-dia. mounting holes* two elliptic holes for bracket mounting two, m4 sensor clamping screws http://www.ia.omron.com/ 8 (c)copyright omron corporation 2007 all rights reserved. operating procedures: proximity sensors e2k-c sensitivity adjustment ? remove the rear rubber cap of the e2k-c and turn the potentiometer in the hole to adjust the sensitivity of the e2k-c. (there is no rubber cap on the e2k-c20m @@. ) ? the sensing distance is increased by turning the potentiometer clockwise and is decreased by turning the potentiometer counterclockwise. the potentiometer can make 15 3 valid turns and then make slip turns because the potentiometer does not have a stopper. the slip turns will not, however, damage the potentiometer. (1)slowly turn the potentiometer clockwise until the e2k-c turns on with no sensing object. (2)turn the potentiometer counterclockwise until the e2k-c turns off with the sensing object located within the sensing distance. (3)the e2k-c will be in stable operation if there is a difference of 1.5 turns or more between the points the e2k-c is turned on and off, otherwise the e2k-c will not operate stably. (4)set the potentiometer midway between the two points. (5)if the distances to the sensing objects vary, take step 2 with the sensing object located at the farthest sensing distance to be applied. remove this rubber cap and adjust the potentiometer. potentiometer stop turning the potentiometer at the moment the e2k-c turns on. potentiometer stop turning the potentiometer at the moment the e2k-c turns off. the point the e2k-c turns on. the point the e2k-c turns off. stable detection if the difference is 1.5 turns or more. the point the e2k-c turns on. the point the e2k-c turns off. midway http://www.ia.omron.com/ 9 (c)copyright omron corporation 2007 all rights reserved. proximity sensors technical guide general precautions for precautions on individual products, refer to the safety precautions in individual product information. these products cannot be used in safety devices for presses or other safety devices used to protect human life. these products are designed for use in applications for sensing workpieces and workers that do not affect safety. to ensure safety, always observe the following precautions. wiring considerations operating environment do not use the sensor in an environment where there are explosive or combustible gases. warning precautions for safe use item typical examples power supply voltage do not use a voltage that exceeds the operat- ing voltage range. applying a voltage that is higher than the operating voltage range, or us- ing an ac power supply (100 vac or higher) for a sensor that requires a dc power supply may cause explosion or burning. dc 3-wire npn output sensors dc 2-wire sensors load short-circuiting ? do not short-circuit the load. explosion or burning may result. ? the load short-circuit protection function op- erates when the power supply is connected with the correct polarity and the power is within the rated voltage range. dc 3-wire npn output sensors ? dc 2-wire sensors ? even with the load short-circuit protection function, protection will not be provided when a load short circuit occurs if the power supply polarity is not correct. incorrect wiring be sure that the power supply polarity and oth- er wiring is correct. incorrect wiring may cause explosion or burning. dc 3-wire npn output sensors connection without a load if the power supply is connected directly with- out a load, the internal elements may explode or burn. be sure to insert a load when connect- ing the power supply. ? dc 2-wire sensors ? even with the load short-circuit protection function, protection will not be provided if both the power supply polarity is incorrect and no load is connected. ac 2-wire sensors load sensor brown blue black load sensor brown blue ? + (load short circuit) load sensor brown blue black (load short circuit) load sensor brown blue ? + + ? ? + load load sensor brown black blue sensor brown blue black ? + sensor brown blue sensor brown blue http://www.ia.omron.com/ c-1 (c)copyright omron corporation 2007 all rights reserved. proximity sensors technical guide the following conditions must be considered to understand the conditions of the application and location as well as the relatio n to control equipment. model selection * mt (millitesla) is a unit for expressing magnetic flux density. one tesla is the equivalent of 10,000 gauss. precautions for correct use item points of consideration sensing object and operating condition of proximity sensor electrical conditions environ- mental conditions mounting conditions influence of external electromag- netic fields ? the influence within a dc magnetic field is 20 mt * max. do not use the sensor at a level higher than 20 mt. ? sudden changes in the dc magnetic field may cause malfunction. do not use the sensor for applications that involve turning a dc electromagnet on and off. ? do not place a transceiver near the sensor or its wiring. doing so may cause malfunction. other con- siderations cost feasibility: price/delivery time life: power-on time/frequency of use check the relation between the sensing object and the proximity sensor. sensing object proximity sensor sensing distance surrounding metals s pecific condi- tions of object direction of ob- ject movement peripheral metal s ensing distance material, size, shape, existence of plating, etc. transit interval, speed, existence of vibration, etc. material, distance to sensor, orien- tation, etc. fluctuation in tran- sit point, allowable error, etc. sensing (set) distance, shape of sensor (rectangular, cylindrical, through- beam, grooved), influence of peripheral metal (shielded sensors, non- shielded sensors), response speed (response frequency), influence of temperature, influence of voltage, etc. verify the electrical conditions of the control system to be used and the electrical performance of the proximity sensor. load output proximity sensor power supply switching element dc (voltage fluctuation, current ca- pacity value) ac (voltage fluctuation, frequency, etc.) need for s3d2 controller power supply selecting the power supply type dc dc + s3d2 controlle r ac { resistive load - non-contact control system inductive load - relay, solenoid, etc. ? steady-state current, inrush current ? operating, reset voltage (current) lamp load ? steady-state current, inrush current open/close frequency load selecting the power supply type dc dc + s3d2 controlle r ac control output maximum current (voltage) leakage current residual load voltage { the environmental tolerance of the proximity sensor is better than that of other types of sensors. however, investigate carefully before using a proximity sensor under harsh temperatures or in special atmospheres. ? water resistance do not use the sensor in water, rain, or outdoors. ? ambient conditions to maintain reliability of operation, do not use the sensor outside the specified temperature range or outdoors. even though the proximity sensor has a water-resistant structure, it must be covered to pre- vent direct contact with water or water-soluble cutting oil. do not use the sensor in atmospheres with chem- ical vapors, in particular, strong alkalis or acids (nitric acid, chromic acid, or hot concentrated sulfuric acid). ? explosive atmospheres do not use the sensor in atmospheres where there is a danger of explosion. use an explosion- proof sensor. temperature and humidity highest or lowest values, existence of direct sunlight, etc. temperature influence, high-temperature use, low temperature use, need for shade, etc. atmosphere water, oil, iron powder, or other special chemicals n e e d f o r w a t e r r e s i s - t a n c e o r o i l r e s i s t a n c e , n e e d f o r e x p l o s i o n - p r o o f s t r u c t u r e vibration and shock size, duration need for strength, mounting method when deciding the mounting method, take into consideration not only restrictions due to mechanical devices, but also ease of main- tenance and inspection, and interference between sensors. wiring method, existence of in- ductance surges connection wires wire type, length, oil-resistant cable, shielded cable, robot cable, etc. conduits, ducts, pre-wired, terminal wiring, ease of main- tenance and inspection mounting procedure installation location existence of mounting brackets, direct mounting, secured with bolts or screws ease of maintenance and inspection, mounting space http://www.ia.omron.com/ c-2 (c)copyright omron corporation 2007 all rights reserved. proximity sensors technical guide design sensing object material the sensing distance varies greatly depending on the material of the sensing object. study the engineering data for the influence of sensing object material and size and select a distance with sufficient leeway. ? in general, if the sensing object is a non- magnetic metal (for example, aluminum), the sensing distance decreases. size of sensing object in general, if the object is smaller than the standard sensing object, the sensing distance decreases. ? design the setup for an object size that is the same or greater than the standard sensing object size from the graphs showing the sensing object size and sensing distance. ? when the size of the standard sensing object is the same or less than the size of the standard sensing object, select a sensing distance with sufficient leeway. thickness of sensing object ? the thickness of ferrous metals (iron, nickel, etc.) must be 1 mm or greater. ? when the coating thickness is 0.01 mm or less, a sensing distance equivalent to a magnetic body can be obtained. when the coating is extremely thin and is not conductive, such as a vacuum deposited film, detection is not possible. ? influence of plating if the sensing object is plated, the sensing distance will change (see the table below). effect of plating (typical) (reference values: percent of non-plated sensing distance) mutual interference ? mutual interference refers to a state where a sensor is affected by magnetism (or static capacitance) from an adjacent sensor and the output is unstable. ? one means of avoiding interference when mounting proximity sensors close together is to alternate sensors with different frequencies. the model tables indicate whether different frequencies are available. please refer to the tables. ? when proximity sensors with the same frequency are mounted together in a line or face-to-face, they must be separated by a minimum distance. for details, refer to mutual interference in the safety precautions for individual sensors. power reset time a sensor is ready for detection within 100 ms after turning on the power. if the load and sensor are connected to separate power supplies, design the system so that the sensor power turns on first. aluminum copper brass stainless steel steel (spcc) 05 10 15 20 25 30 35 40 45 50 55 side length (one side) of sensing object: d (mm) 14 12 10 8 6 4 2 x d t=1mm sensing distance x (mm) example: e2-x10d @ thickness and base material of plating steel brass no plating 100 100 zn 5 to 15 m 90 to 120 95 to 105 cd 5 to 15 m 100 to 110 95 to 105 ag 5 to 15 m 60 to 90 85 to 100 cu 10 to 20 m 70 to 95 95 to 105 cu 5 to 15 m - 95 to 105 cu (5 to 10 m) + ni (10 to 20 m) 70 to 95 - cu (5 to 10 m) + ni (10 m) + cr (0.3 m) 75 to 95 - aluminum steel 0 0.01 0.1 1 10 thickness of sensing object: t (mm) 10 8 6 4 2 sensing distance x (mm) reset operate sensing object shape: square d=30mm http://www.ia.omron.com/ c-3 (c)copyright omron corporation 2007 all rights reserved. proximity sensors technical guide turning off the power an output pulse may be generated when the power is turned off, so design the system so that the load or load line power turns off first. influence of surrounding metal the existence of a metal object other than the sensing object near the sensing surface of the proximity sensor will affect detection perfor- mance, increase the apparent operating distance, degrade tempera- ture characteristics, and cause reset failures. for details, refer to the influence of surrounding metal table in safety precautions for individ- ual sensors. the values in the table are for the nuts provided with the sensors. changing the nut material will change the influence of the surrounding metal. power transformers be sure to use an insulated transformer for a dc power supply. do not use an auto-transformer (single-coil transformer). precautions for ac 2-wire/dc 2-wire sensors surge protection although the proximity sensor has a surge absorption circuit, if there is a device (motor, welder, etc.) that causes large surges near the proximity sensor, insert a surge absorber near the source of the surges. influence of leakage current even when the proximity sensor is off, a small amount of current runs through the circuit as leakage current. for this reason, a small current may remain in the load (residual voltage in the load) and cause load reset failures. verify that this voltage is lower than the load reset voltage (the leakage current is less than the load reset current) before using the sensor. using an electronic device as the load for an ac 2-wire sensor when using an electronic device, such as a timer, some types of devices use ac half-wave rectification. when a proximity sensor is connected to a device using ac half-wave rectification, only ac half- wave power will be supplied to the sensor. this will cause the sensor operation to be unstable. also, do not use a proximity sensor to turn the power supply on and off for electronic devices that use dc half- wave rectification. in such a case, use a relay to turn the power supply on and off, and check the system for operating stability after connecting it. examples of timers that use ac half-wave rectification timers: h3y, h3yn, h3rn, h3ca-8, rd2p, and h3cr (-a, -a8, -ap, -f, -g) countermeasures for leakage current (examples) ac 2-wire sensors connect a bleeder resistor to bypass the leakage current flowing in the load so that the current flowing through the load is less than the load reset current. calculate the bleeder resistance and allowable power using the following equation. p : watts of bleeder resistance (the actual number of watts used should be several times this number) i : load current (ma) it is recommend that leeway be included in the actual values used. for 100 vac, use 10 k or less and 3 w (5 w) or higher, and for 200 vac, use 20 k or less and 10 w (20 w) or higher. if the effects of heat generation are a problem, use the number of watts in parentheses ( ) or higher. dc 2-wire sensors connect a bleeder resistor to bypass the leakage current flowing in the load, and design the load current so that (leakage current) (load input impedance) < reset voltage. calculate the bleeder resistance and allowable power using the following equation. p : watts of bleeder resistance (the actual number of watts used should be several times this number) i r : leakage current of proximity sensor (ma) i off : load reset current (ma) it is recommend that leeway be included in the actual values used. for 12 vdc, use 15 k or less and 450 mw or higher, and for 24 vdc, use 30 k or less and 0.1 w or higher. r vs (k )p > vs 2 (mw) 10 - i r r vs (k ) p > vs 2 (mw) i r - i offr r when using an ac 2-wire sensor, connect a bleeder resistor so that the proximity sensor current is at least 10 ma, and the residual load voltage when the proximity sensor is off is less than the load reset voltage. bleeder resistor r load ac power supply voltage vs vs bleeder resistor r load http://www.ia.omron.com/ c-4 (c)copyright omron corporation 2007 all rights reserved. proximity sensors technical guide loads with large inrush current loads, such as lamps or motors, that cause a large inrush current * will weaken or damage the switching element. in this situation, use a relay. *e2k, tl-n @ y: 1 a or higher mounting mounting the sensor when mounting a sensor, do not tap it with a hammer or otherwise subject it to excessive shock. this will weaken water resistance and may damage the sensor. if the sensor is being secured with bolts, observe the allowable tightening torque. some models require the use of toothed washers. for details, refer to the mounting precautions in precautions for correct use in individual product information. mounting/removing using din track (example for e2cy) proximity sensors technical guide wiring considerations and/or connections for proximity sensors note: when and/or connections are used with proximity sensors, the effects of erroneous pulses or leakage current may prevent us e. verify that there are no problems before use. model type of connection connection description dc 2-wire and (series connection) keep the number of connected sensors (n) within the range of the following equation. v s - n v r operating load voltage it is possible, however, that the indicators may not light correctly and error pulses (of approximately 1 ms) may be generated because the rated power supply voltage and current are not supplied to individual proximity sensors. verify that this is not a problem before operation. or (parallel connection) keep the number of connected sensors (n) within the range of the following equation. n i load reset current example: when an my (24-vdc) relay is used as the load, the maximum number of sensors that can be connected is 4. ac 2-wire and (series connection) proximity sensors technical guide note: when and/or connections are used with proximity sensors, the effects of erroneous pulses or leakage current may prevent us e. verify that there are no problems before use. extending cable length the cable of a built-in amplifier sensor can be extended to a maximum length of 200 m with each of the standard cables (excluding some models). for separate amplifier sensors (e2c-eda, e2c, e2j, e2cy), refer to the specific precautions for individual products. bending the cable if you need to bend the cable, we recommend a bend radius that is at least 3 times the outer diameter of the cable (with the exception of coaxial and shielded cables). cable tensile strength in general, do not subject the cable to a tension greater than that indicated in the following table. note: do not subject a shielded cable or coaxial cable to tension. separating high-voltage lines using metal conduits if a power line is to be located near the proximity sensor cable, use a separate metal conduit to prevent malfunction or damage. (same for dc models.) example of connection with s3d2 sensor controller using the s3d2 sensor controller connecting to a relay load note: dc 2-wire sensors have a residual voltage of 3 v. check the operating voltage of the relay before use. the residual voltage of the e2e-xd-m1j-t is 5 v. model type of connection connection description dc 3-wire and (series connection) keep the number of connected sensors (n) within the range of the following equation. il + (n - 1) i upper limit of proximity sensor control output v s - n v r operating load voltage note: when an and circuit is connected, the operation of proximity sensor b causes power to be supplied to proximity sensor a, and thus erroneous pulses (approximately 1 ms) may be generated in a when the power is turned on. for this reason, take care when the load has a high response speed because malfunction may result. or (parallel connection) for sensors with a current output, a minimum of three or connections is pos- sible. whether or not four or more connections is possible depends on the model. (b) (a) vs i + + out out - - il i load example: a maximum of two sensors can be used when an my (24-vdc) relay is used for the load. n : number of sensors that can be con- nected v r : residual output voltage of sensor v s : power supply voltage i : current consumption of sensor il: load current - out out - + + vs load cable diameter tensile strength less than 4 mm 30 n max. 4 mm min. 50 n max. dc 2-wire sensors dc 3-wire sensors 5 2 4 1 6 3 11 8 10 7 12 9 brown out blue 0 v s3d2 operation can be reversed with the signal input switch on the s3d2. blue brown 24 vdc x 5 2 4 1 6 3 11 8 10 7 12 9 black out blue 0 v brown +12 v s3d2 operation can be reversed with the signal input switch on the s3d2. http://www.ia.omron.com/ c-7 (c)copyright omron corporation 2007 all rights reserved. proximity sensors technical guide operating environment water resistance do not use the sensor in water, rain, or outdoors. ambient conditions do not use the sensor in the following environments. doing so may cause malfunction or failure of the sensor. 1. to maintain operational reliability and service life, use the sensor only within the specified temperature range and do not use it outdoors. 2. the sensor has a water resistant structure, however, attaching a cover to prevent direct contact with water will help improve reliability and prolong product life. 3. avoid using the sensor where there are chemical vapors, especially strong alkalis or acids (nitric acid, chromic acid, or hot concentrated sulfuric acid). maintenance and inspection periodic inspection to ensure long-term stable operation of the proximity sensor, inspect for the following on a regular basis. conduct these inspections also for control devices. 1. shifting, loosening, or deformation of the sensing object and proximity sensor mounting 2. loosening, bad contact, or wire breakage in the wiring and connections 3. adherence or accumulation of metal powder 4. abnormal operating temperature or ambient conditions 5. abnormal indicator flashing (on setting indicator types) disassembly and repair do not under any circumstances attempt to disassemble or repair the product. quick failure check you can conveniently check for failures by connecting the e39-va handy checker to check the operation of the sensor. http://www.ia.omron.com/ c-8 (c)copyright omron corporation 2007 all rights reserved. 2007. 12 omron corporation industrial automation company http://www.ia.omron.com/ (c)copyright omron corporation 2007 all rights reserved. in the interest of product improvement, specifications are subject to change without notice. read and understand this catalog please read and understand this catalog before purchasing the products. please consult your omron representative if you have an y questions or comments. warranty and limitations of liability warranty omron's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if speci ed) from date of sale by omron. omron makes no warranty or representation, express or implied, regarding non-infringement, merchantability, or fitness for particular purpose of the products. any buyer or user acknowledges that the buyer or user alone has determined that the products will suitably meet the requirements of their intended use. omron disclaims all other warranties, express or implied. limitations of liability omron shall not be responsible for special, indirect, or consequential damages, loss of profits, or commercial loss in any way connected with the products, whether such claim is based on contract, warranty, negligence, or strict liability. in no event shall responsibility of omron for any act exceed the individual price of the product on which liability is asserted . in no event shall omron be responsible for warranty, repair, or other claims regarding the products unless omron's analysis confirms that the products were properly handled, stored, installed, and maintained and not subject to contamination, abuse, misuse, or inappropriate modification or repair. application considerations suitability for use omron shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of products in the customer's application or use of the product. at the customer's request, omron will provide applicable third party certi cation documents identifying ratings and limitations of use that apply to the products. this information by itself is not suf cient for a complete determination of the suitability of the products in combination with the end product, machine, system, or other application or use. the following are some examples of applications for which particular attention must be given. this is not intended to be an exh austive list of all possible uses of the products, nor is it intended to imply that the uses listed may be suitable for the products: ? outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this catalog. ? nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles, safety equipment, and installations subject to separate industry or government regulations. ? systems, machines, and equipment that could present a risk to life or property. please know and observe all prohibitions of use applicable to the products. never use the products for an application involving serious risk to life or property without ensuring that the system as a whole has been designed to address the risks, and that the omron product is properly rated and installed for the intended use within the overall equipment or system. disclaimers change in specifications product speci cations and accessories may be changed at any time based on improvements and other reasons. it is our practice to change model numbers when published ratings or features are changed, or when signi cant construction changes are made. however, some speci cations of the product may be changed without any notice. when in doubt, special model numbers may be assigned to x or establish key speci cations for your application on your request. please consult with your omron representative at any time to con rm actual speci cations of purchased product. dimensions and weights dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown. errors and omissions the information in this catalog has been carefully checked and is believed to be accurate; however, no responsibility is assume d for clerical, typographical, or proofreading errors, or omissions. performance data performance data given in this catalog is provided as a guide for the user in determining suitability and does not constitute a warranty. it may represent the result of omron?s test conditions, and the users must correlate it to actual application requirements. actual performance is subject to the omron warranty and limitations of liability. programmable products omron shall not be responsible for the user's programming of a programmable product, or any consequence thereof. copyright and copy permission this catalog shall not be copied for sales or promotions without permission. this catalog is protected by copyright and is intended solely for use in conjunction with the product. please notify us before copying or reproducing this catalog in any manner, for any other purpose. if copying or transmitting this catalog to another, please copy or transmit it in its entirety. |
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