WORLD-BEAM QS30 DC Voltage Compact, self-contained photoelectric sensors in universal-style housing Features Advanced one-piece photoelectric sensors with exceptional long-range optical performance Compact housing with mounting versatility, via its popular 30 mm threaded barrel or side-mount holes 10 to 30V dc operation with bipolar discrete outputs, NPN and PNP Selectable Light or Dark Operate, depending on hookup Tough ABS/polycarbonate blend housing is rated to IEC IP67 NEMA 6 Easy-to-see sensor status indicators: two status LEDs visible from 360 extra-large Output indicator on back of sensor housing (except emitters) visible from long distance Opposed, retroreflective, polarized retroreflective, diffuse and fixed-field (200, 400, or 600 mm cutoff) models available Retroreflective, polarized retroreflective, and diffuse models have potentiometer on back of housing for easy sensor range adjustment Choose 2 m integral cable or Euro-style integral QD models Models Sensing Mode Model* Range Output Sensing Mode Model* Range Output 875 nm Infrared 940 nm Infrared QS30E emitter Effective Beam: 18 mm (0.7 ) QS30D 1 m (3.3 ) 60 m (200 ) QS30R receiver 680 nm Visible Red 630 nm Visible Red QS30FF200 200 mm (8 ) Bipolar QS30LP 8 m (26 ) NPN/PNP Bipolar P NPN/PNP 400 mm QS30FF400 (16 ) 630 nm Visible Red QS30LV 12 m (40 ) 600 mm QS30FF600 (24 ) * Only standard 2 m (6.5 ) cable models are listed. For 9 m (30 ) integral cable, add suffix W/30 to the model number (e.g., QS30E W/30). QD models: For 5-pin integral Euro-style QD, add suffix Q (e.g., QS30EQ). Range is specified using a model BRT-84 retroreflector. WARNING . Not To Be Used for Personnel Protection Never use these products as sensing devices for personnel protection. Doing so could lead to serious injury or death These sensors do NOT include the self-checking redundant circuitry necessary to allow their use in personnel safety applications. A sensor failure or malfunction can cause either an energized or de-energized sensor output condition. Consult your current Banner Safety Products catalog for safety products which meet OSHA, ANSI and IEC standards for personnel protection. Printed in USA 11/05 P/N 119165 rev. A Retro Polarized Retro Opposed Fixed-Field Diffuse WORLD-BEAM QS30 DC Voltage Fixed-Field Mode Overview QS30 Series self-contained fixed-field sensors are small, powerful, visible red 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 that are directly in front of another surface, while ignoring the surface in the background. The cutoff distance is fixed. Backgrounds and background objects must always be placed beyond the cutoff distance. Fixed-Field Sensing Theory of Operation Cutoff In operation, the QS30FF compares the reflections of its emitted light beam (E) from an Distance Object B object back to the sensors two differently-aimed detectors R1 and R2 (see Figure 2). If Receiver Object or Elements A the near detector (R1) light signal is stronger than the far detector (R2) light signal (see Background Lenses Near object A, closer than the cutoff distance), the sensor responds to the object. If the far R1 Detector detector (R2) light signal is stronger than the near detector (R1) light signal (see object Far B, object beyond the cutoff distance), the sensor ignores the object. R2 Detector The cutoff distance for model QS30FF sensors is fixed at 200, 400 or 600 millimeters (8 , 16 , or 24 ). Objects lying beyond the cutoff distance are ignored, even if they are highly reflective. However, it is possible to falsely detect a background object, under E Emitter certain conditions (see Background Reflectivity and Placement). Sensing Range In the drawings and discussion on these pages, the letters E, R1, and R2 identify how the sensors three optical elements (Emitter E, Near Detector R1, and Far Detector Object is sensed if amount of light at R1 R2) line up across the face of the sensor. The location of these elements defines the is greater than the amount of light at R2 sensing axis (see Figure 2). The sensing axis becomes important in certain situations, Figure 1. Fixed-field concept such as those illustrated in Figures 5 and 6. Sensor Setup Sensing Reliability For best sensing reliability, the sensor-to-object distance should be positioned to Sensing maximize excess gain. The excess gain curves for these products are shown on page Axis 5. Sensing at higher excess gains will make maximum use of each sensors available sensing power. The background must be placed beyond the cutoff distance more reflective backgrounds must be placed further back. Following these two guidelines will improve sensing reliability. Background Reefl ctivity and Placement Avoid mirror-like backgrounds that produce specular reflections. False sensor response will occur if a background surface reflects the sensors light more strongly to the As a general rule, the most reliable sensing near detector, or sensing detector (R1) than to the far detector, or cutoff detector of an object approaching from the side occurs when the line of approach is (R2). The result is a false ON condition (Figure 3). Use of a diffusely-reflective (matte) parallel to the sensing axis. background will cure this problem. Other possible solutions are to angle the sensor or angle the background (in any plane) so the background does not reflect light back to Figure 2. Fixed-field sensing axis the sensor (see Figure 4). Position the background as far beyond the cutoff distance as possible. An object beyond the cutoff distance, either stationary (and when positioned as shown in Figure 5), or if it moves past the face of the sensor in a direction perpendicular to the sensing axis, can cause unwanted triggering of the sensor if it reflects more light to the near detector than to the far detector. The problem is easily remedied by rotating the sensor 90 (Figure 6). The object then reflects the R1 and R2 fields equally, resulting in no false triggering. A better solution, if possible, may be to reposition the object or the sensor. Banner Engineering Corp. Minneapolis, MN U.S.A. www.bannerengineering.com Tel: 763.544.3164 2 P/N 119165 rev. A R1 R2 E