MINI-BEAM SM312D Self-contained DC-operated Diffuse Mode Sensors Compact, modulated, self-contained diffuse proximity mode sensors for 10-30V dc operation Range to 380 mm (15 ) (referenced to 90% reflectance white test card) Switch-selectable for light operate or dark operate Includes Banners exclusive AID alignment system* Highly repeatable 1 millisecond response Both sourcing and sinking outputs (150 mA max. each) continuous overload and short-circuit protected Rugged, epoxy-encapsulated construction: meets NEMA standards 1, 2, 3, 3S, 4, 4X, 6, 12 and 13 IEC IP67 Physically and electrically interchangeable with 18 mm barrel-type photoelectrics *US patent number 4356393 Infrared, 880 nm MINI-BEAM Diffuse Mode Models Supply Output Excess Gain Beam Pattern Models Range Cable* Voltage Type Performance based on 90% reflectance white test card 1000 SM312D E SM312D X 15 mm 0.6 in Diffuse Mode Diffuse Mode C 10 mm 0.4 in 100 E 5 mm 0.2 in S S 0 0 SM312D 380 mm 2 m (6.5 ) Bipolar 10-30V dc 5 mm 0.2 in 10 G SM312DQD (15 ) 4-Pin Euro QD NPN/PNP 10 mm 0.4 in A I 15 mm 0.6 in N 1 0 75 mm 150 mm 225 mm 300 mm 375 mm 1 mm 10 mm 100 mm 1000 mm 3.0 in 6.0 in 9.0 in 12.0 in 15.0 in .04 in .4 in 4 in 40 in DISTANCE DISTANCE *Notes: i) 9 m (30 ) cables are available by adding suffix W/30 to the model number of any cabled sensor (e.g., SM312D W/30). ii) A 150 mm (6 ) long pigtail cable with attached QD connector is available by adding suffix QDP to the model number of any MINI-BEAM sensor (e.g., SM312DQDP). See page 5 for more information. iii) A model with a QD connector requires an accessory mating cable. See page 8 for more information. iv) May be ordered with 0.3 millisecond on/off response by adding suffix MHS to the model numbers (e.g., SM312DMHS). This modification reduces sensing range (and excess gain). Printed in USA 05/01 P/N 03366 rev. D MINI-BEAM Sensors SM312D MINI-BEAM Installation and Alignment Proper operation of the SM312D sensor requires that it be mounted securely and aligned properly. Excessive movement or vibration can result in intermittent or false operation caused by loss of alignment. For best results, final-mount the SM312D in Diffuse Mode Alignment an 18mm-hole by its threaded barrel or use a mounting bracket (see page 6). 1) Begin with the sensor at the desired distance from the object to be sensed, and at the approximate position where it will be mounted. The background should be as far behind the object as possible (at least three times the distance of the sensor from the object), and as dark a color as possible compared to the object. Ideally, the object SM312D should present its largest reflective surface to the sensor. 2) Apply power to the sensor, and advance the 15-turn GAIN control to maximum (clockwise end of rotation). The GAIN control is clutched at both ends to avoid damage, and will free-wheel when either end point is reached. If the sensor is seeing its reflected light, the sensor alignment LED should be on. Move the sensor up-down-right-left (include angular rotation) to obtain the fastest receiver LED pulse rate. If a pulse is not observable (too fast to count), reduce the GAIN control (counterclockwise rotation) to obtain a countable pulse rate. 3) Repeat the alignment motions after each GAIN reduction. When you have found the sensor orientation that produces the fastest pulse rate, mount the sensor solidly in that position. Increase the receiver GAIN to maximum. Test the system by removing the object from the sensing position. The receiver LED indicator should go off. If SM312D the LED indicator does not go off, the sensor is reacting to light reflected from a background surface. Reduce the GAIN setting until the alignment indicator goes off, plus two additional full turns. Again place the object in the sensing position. If the 15 Turn Gain alignment indicator does not come on, the sensor is receiving as much or more Adjustment light energy from the background as from the object. Consider the following and Light/Dark Operate Switch* alternatives: Gasketed a) move the sensor closer to the object and reduce the sensitivity (GAIN) Acrylic Cover b) reduce background reflectivity by painting the background with flat-black AID Indicator LED Lights when the sensor sees its own modulated paint, or by scuffing the background or cutting a hole through it light and pulses at a rate proportional to the strength of the received light signal. c) tilt the sensor or the background so that the sensing beam is not perpendicular to the background. * Note regarding Light/Dark operate switch: Turn switch fully clockwise for light operate (sensor outputs conduct when sensing light is received) Turn switch fully counterclockwise for dark operate (sensor outputs conduct when sensing light is not received) Banner Engineering Corp. Minneapolis, U.S.A. www.bannerengineering.com Tel: 763.544.3164 page 2 Object Up Left Right Down