T30 Sensors dc-voltage Series

Transcription

1 T3 ensors dc-voltage eries elf-contained dc-operated sensors Models Features Featuring Z-BM technology, the specially designed optics and electronics provide reliable sensing without the need for adjustments T style plastic housing with 3 mm threaded lens in opposed, retroreflective or fixed-field modes ompletely epoxy-encapsulated to provide superior durability, even in harsh sensing environments rated to P69K nnovative dual-indicator system takes the guesswork out of sensor performance monitoring dvanced diagnostics to warn of marginal sensing conditions or output overload to 3V dc; choose PDT (complementary) P or PP outputs (5 m max. ea.) ensing Mode Range LD Output Model* T36 Opposed 6 m (2') nfrared 95 nm P T36R PP T3P6R P Polarized Retroreflective 6 m (2') Visible Red 68 nm P PP T36LP T3P6LP 2 mm (8") cutoff P PP T36FF2 T3P6FF2 Fixed-Field 4 mm (6") cutoff nfrared 88 nm P PP T36FF4 T3P6FF4 6 mm (24") cutoff * tandard 2 m (6.5') cable models are listed. 9 m (3') cable: add suffix W/3 (e.g., T36 W/3). 4-pin uro-style QD models: add suffix Q (e.g., T36Q). model with a QD connector requires a mating cable. (ee page 7.) P PP T36FF6 T3P6FF6 WR... ot To Be Used for Personnel Protection ever use these products as sensing devices for personnel protection. Doing so could lead to serious injury or death. These sensors do OT include the self-checking redundant circuitry necessary to allow their use in personnel safety applications. sensor failure or malfunction can cause either an energized or de-energized sensor output condition. onsult your current Banner afety Products catalog for safety products ich meet OH, and standards for personnel protection. Printed in U /5 P/ 2524

2 T3 ensors dc-voltage eries Fixed-Field Mode Overview T3 eries self-contained fixed-field sensors are small, powerful, infrared diffuse mode sensors with far-limit cutoff (a type of background suppression). Their high excess gain and fixed-field technology allow them to detect objects of low reflectivity, ile ignoring background surfaces. The cutoff distance is fixed. s and background objects must always be placed beyond the cutoff distance. Fixed-Field ensing Theory of Operation The T3FF compares the reflections of its emitted light beam () from an object back to the sensor s two differently aimed detectors, R and (see Figure ). f the near detector (R) light signal is stronger than the far detector () light signal (see object, closer than the cutoff distance), the sensor responds to the object. f the far detector () light signal is stronger than the near detector (R) light signal (see object B, beyond the cutoff distance), the sensor ignores the object. The cutoff distance for model T3FF sensors is fixed at 2, 4 or 6 millimeters (8", 6", or 24"). Objects lying beyond the cutoff distance are usually ignored, even if they are highly reflective. However, it is possible to falsely detect a background object, under certain conditions (see Reflectivity and Placement). n the drawings and discussion on these pages, the letters, R, and identify how the sensor s three optical elements (mitter, ear Detector R, and Far Detector ) line up across the face of the sensor. The location of these elements defines the sensing axis (see Figure 2). The sensing axis becomes important in certain situations, such as those illustrated in Figures 5 and 6. ear Detector Far Detector mitter Receiver lements R Lenses Object ensing Range Object is sensed if amount of light at R is greater than the amount of light at Figure. Fixed-field concept utoff Object B or ensor etup ensing Reliability For highest sensitivity, position the target object for sensing at or near the point of maximum excess gain. The excess gain curves for these products are shown on page 5. Maximum excess gain for all models occurs at a lens-to-object distance of about 4 mm (.5"). ensing at or near this distance will make maximum use of each sensor s available sensing power. The background must be placed beyond the cutoff distance. (ote that the reflectivity of the background surface also may affect the cutoff distance.) Following these two guidelines will improve sensing reliability. Reflectivity and Placement void mirror-like backgrounds that produce specular reflections. False sensor response will occur if a background surface reflects the sensor s light more strongly to the near detector, or sensing detector (R), than to the far detector, or cutoff detector (). The result is a false O condition (Figure 3). To cure this problem, use a diffusely reflective (matte) background, or angle either the sensor or the background (in any plane) so the background does not reflect light back to the sensor (see Figure 4). Position the background as far beyond the cutoff distance as possible. n object beyond the cutoff distance, either stationary (and en positioned as shown in Figure 5), or moving past the face of the sensor in a direction perpendicular to the sensing axis, can cause unwanted triggering of the sensor if more light is reflected to the near detector than to the far detector. The problem is easily remedied by rotating the sensor 9 (Figure 6). The object then reflects the R and fields equally, resulting in no false triggering. better solution, if possible, may be to reposition the object or the sensor. R ensing xis s a general rule, the most reliable sensing of an object approaching from the side occurs en the line of approach is parallel to the sensing axis. Figure 2. Fixed-field sensing axis 2 P/ 2524 Banner ngineering orp. Minneapolis, M U... Tel:

3 T3 ensors dc-voltage eries olor ensitivity The effects of object reflectivity on cutoff distance, though small, may be important for some applications. t is expected that at any given cutoff setting, the actual cutoff distance for lower reflectance targets will be slightly shorter than for higher reflectance targets (see Figure-of-Merit information on page 5). This behavior is known as color sensitivity. For example, an excess gain of (see page 5) for an object that reflects / as much light as the 9% ite card is represented by the horizontal graph line at excess gain =. n object of this reflectivity results in a far limit cutoff of approximately 9 mm (8"), for the 2 mm (8") cutoff model for example; thus 9 mm represents the cutoff for this sensor and target. These excess gain curves were generated using a ite test card of 9% reflectance. Objects with reflectivity of less than 9% reflect less light back to the sensor, and thus require proportionately more excess gain in order to be sensed with the same reliability as more reflective objects. When sensing an object of very low reflectivity, it may be especially important to sense it at or near the distance of maximum excess gain. R = ear Detector = Far Detector = mitter utoff Fixed ensing Field utoff T3FF R ore of mitted Beam trong Direct Reflection to R Fixed ensing Field T3FF R R = ear Detector = Far Detector = mitter ore of mitted Beam trong Direct Reflection way From ensor Figure 3. background problem Figure 4. background solution T3FF utoff T3FF utoff R,, R R = ear Detector = Far Detector = mitter Fixed ensing Field or Moving Object = mitter = Far Detector R = ear Detector Fixed ensing Field or Moving Object reflective background object in this position or moving across the sensor face in this axis and direction may cause false sensor response. Figure 5. Object beyond cutoff problem reflective background object in this position or moving across the sensor face in this axis will be ignored. Figure 6. Object beyond cutoff solution Banner ngineering orp. Minneapolis, M U... Tel: P/

4 T3 ensors dc-voltage eries upply Voltage and urrent upply Protection ircuitry pecifications to 3V dc (% max. ripple); supply current (exclusive of load current): mitters, on-polarized, Retro: 25 m Receivers: 2 m Polarized Retroreflective: 3 m Fixed-Field: 35 m Protected against reverse polarity and transient voltages Output onfiguration PDT solid-state dc switch; P (current sinking) or PP (current sourcing) outputs, depending on model Light Operate:.O. output conducts en sensor sees its own (or the emitter s) modulated light Dark Operate:.. output conducts en the sensor sees dark; the.. (normally closed) output may be wired as a normally open marginal signal alarm output, depending upon hookup to power supply Output Rating 5 m maximum (each) in standard hookup. When wired for alarm output, the total load may not exceed 5 m. OFF-state leakage current: < 3V dc O-state saturation voltage: < m dc; 5 m dc Output Protection ircuitry Output Response Time Protected against false pulse on power-up and continuous overload or short circuit of outputs Opposed mode: 3 ms O,.5 ms OFF Retro, Fixed-Field and Diffuse: 3 ms O and OFF OT: ms delay on power-up; outputs do not conduct during this time. Repeatability Opposed mode: 375 µs Retro, Fixed-Field and Diffuse: 75 µs Repeatability and response are independent of signal strength. ndicators onstruction nvironmental Rating Two LDs (reen and Yellow) reen O steady: power to sensor is O reen flashing: output is overloaded Yellow O steady:.o. output is conducting Yellow flashing: excess gain marginal ( to.5x) in light condition PBT polyester housing; polycarbonate (opposed-mode) or acrylic lens Leakproof design rated M 6P, D 45 (P69K) onnections 2 m (6.5') or 9 m (3') attached cable or 4-pin uro-style quick-disconnect fitting Operating onditions Temperature: -4 to 7 (-4 to 58 F) Maximum relative humidity: 9% at 5 (non-condensing) Vibration and Mechanical hock ertifications ll models meet Mil. td. 22F requirements. Method 2 (Vibration; frequency to 6 Hz, max., double amplitude.6" acceleration ). Method 23B conditions H& (hock: 75 with unit operating; for non-operation) 4 P/ 2524 Banner ngineering orp. Minneapolis, M U... Tel:

5 T3 ensors dc-voltage eries Performance urves xcess ain Beam Pattern xcess ain Performance based on use of a 9% reflectance ite test card. Opposed. m (.33') m (3.3') DT T3 eries Opposed Mode m (33') m (33') 75 mm 5 mm 25 mm 25 mm 5 mm 75 mm T3 eries Opposed Mode 5 m (5') 3 m (') 45 m (5') DT 6 m (2') 3" 2" " " 2" 3" 75 m (25') Fixed-Field 2 mm mm (.4") mm (.4") T3 eries Fixed-field mode with 2 mm far limit cutoff DT mm (4") mm (4") Ø 6 mm spot 35 mm focus Ø 2 mm spot 2 mm cutoff Using 8% gray test card: utoff distance will be 95% of value shown. Using 6% black test card: utoff distance will be 9% of value shown. Polarized Retro. m (.33'). m (.33') T3 eries DT Polarized Retro with BRT-3 Reflector m (3.3') m (33') 5 mm mm 5 mm 5 mm mm 5 mm T3 eries Polarized Retro with BRT-3 Reflector.5 m (5') 3. m (') 4.5 m (5') DT 6. m (2') 6" 4" 2" 2" 4" 6" 7.5 m (25') Fixed-Field 4 mm mm (.4") mm (.4") T3 eries Fixed-field mode with 4 mm far limit cutoff DT mm (4") mm (4") Ø 7 mm spot 35 mm focus Ø 25 mm spot 4 mm cutoff Using 8% gray test card: utoff distance will be 9% of value shown. Using 6% black test card: utoff distance will be 85% of value shown. Performance based on use of a model BRT-3 retroreflector (3" diameter). ctual sensing range may be more or less than specified, depending on the efficiency and reflective area of the retroreflector used. Fixed-Field 6 mm mm (.4") mm (.4") T3 eries Fixed-field mode with 6 mm far limit cutoff DT mm (4") mm (4") Ø 7 mm spot 35 mm focus Ø 3 mm spot 6 mm cutoff Using 8% gray test card: utoff distance will be 85% of value shown. Using 6% black test card: utoff distance will be 75% of value shown. Focus and spot sizes are typical. Banner ngineering orp. Minneapolis, M U... Tel: P/

6 T3 ensors dc-voltage eries Dimensions abled Models QD Models Jam ut (upplied) M3 x.5 Thread ø 4. mm (.57") ø 5 mm (.59") 45. mm (.77") 5.5 mm (2.3") reen LD Power ndicator Yellow LD Output ndicator.5 mm (.45") 66.5 mm (2.62") abled mitters QD mitters -3V dc - 3V dc no connection P (inking) Outputs tandard Hookup Hookups larm Hookup larm - 3V dc - 3V dc PP (ourcing) Outputs tandard Hookup larm Hookup larm - 3V dc - 3V dc OT: abled hookups shown; QD hookups are functionally identical. 6 P/ 2524 Banner ngineering orp. Minneapolis, M U... Tel:

7 T3 ensor dc-voltage eries Quick-Disconnect (QD) ables tyle Model Length Dimensions Pinout 4-pin uro-style traight MQD-46 MQD-45 MQD-43 2 m (6.5') 5 m (5') 9 m (3') ø 5 mm (.6") 44 mm max. M2 x (.7") White Wire Brown Wire 38 mm max. (.5") Black Wire Blue Wire 4-pin uro-style Right-angle MQD-46R MQD-45R MQD-43R 2 m (6.5') 5 m (5') 9 m (3') M2 x 38 mm max. (.5") ø 5 mm (.6") WRRTY: Banner ngineering orp. warrants its products to be free from defects for one year. Banner ngineering orp. will repair or replace, free of charge, any product of its manufacture found to be defective at the time it is returned to the factory during the warranty period. This warranty does not cover damage or liability for the improper application of Banner products. This warranty is in lieu of any other warranty either expressed or implied. P/ 2524 Banner ngineering orp., 974 Tenth ve. o., Minneapolis, M U 5544 Phone: mail: sensors@bannerengineering.com