LX Series Part-Sensing Light Screen For Sensing Small or Flat Parts at High Speeds Features Emitter and receiver pair produce a strobed web of modulated light beams, in 8 lengths, 2 sensing ranges Simple, economical and highly reliable means of sensing small parts or flat items which pass anywhere through the light screen Fast response, output includes a 5-millisecond pulse stretcher for interfacing reliability Simple wiring configuration emitter and receiver do not need a synchronization wire Rugged, self-contained and compact construction rated IEC IP65 Bipolar design offers both NPN (current sinking) and PNP (current sourcing) solid-state outputs Infrared, 880 nm Models Short-Range Models Standard-Range Models 75-200 mm (3 -8 ) 150 mm - 2 m (6 -6.5 ) Sensing Array Supply Output Cable* Length Voltage Type 5.6 mm dia. Minimum 9.5 mm dia. Minimum Object Detection Size Object Detection Size LX3ESR Emitter LX3E Emitter 67 mm (2.6 ) LX3RSR Receiver LX3R Receiver LX6ESR Emitter LX6E Emitter 143 mm (5.6 ) LX6RSR Receiver LX6R Receiver LX9E Emitter 218 mm (8.6 ) LX9R Receiver LX12ESR Emitter LX12E Emitter 295 mm (11.6 ) 2 m (6.5 ) LX12RSR Receiver LX12R Receiver Bipolar 5-wire 10-30V dc NPN/PNP LX15E Emitter Integral cable 371 mm (14.6 ) LX15R Receiver LX18E Emitter 447 mm (17.6 ) LX18R Receiver LX21E Emitter 523 mm (20.6 ) LX21R Receiver LX24E Emitter 599 mm (23.6 ) LX24R Receiver Sizes not listed available on request contact factory * Integral cable models are listed for 5-pin Euro-style 150 mm (6 ) QD pigtail, add suffix Q to model number (e.g., LX3EQ). QD models require a mating cable see page 4. 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 02/09 P/N 108865 rev. DLX Series Part-Sensing Light Screens Sensing is most effective in the Theory of Operation center 80% of the sensing range The LX Series light screen sensing system consists of two self-contained units: an Emitter Receiver emitter and a receiver of equal size and sensing range. The emitter has multiple infrared LEDs spaced at 9.5 mm (0.38 ) increments, and the receiver has corresponding photodiodes. The emitter sequentially fires each infrared LED. Multiple photodiodes in the receiver recognize each of the emitted pulses the result is a cross-hatched optical pattern. Optical synchronization enables the receiver to recognize light from each of the emitter LEDs. The optical crosshatch pattern enables the LX system to detect targets of very small diameter, and extremely thin, flat objects as thin as a piece of paper or an envelope. For small diameter objects, the sensing resolution is less effective at the exact center (see M.O.D.S. specification) of the sensing range and at the extreme edges of the pattern (close to the emitter and receiver faces) sensing should take place within the Figure 1. LX Series optical crosshatch center 80 percent of the range, as shown in Figure 1. pattern LX Series sensors are available in two ranges: short and standard. Short-range emitters and receivers may be located as close together as 75 mm (3 ), with a maximum separation of 200 mm (8 ). Standard-range sensors may be separated 150 mm to 2 m (6 to 6.5 ) apart. Both emitter and receiver must be either short-range or standard models, of the same length. Detection sensitivity varies somewhat, depending on the distance between the sensors and the position of the target object. 14.0 mm 1.8 mm (0.55 ) (0.07 ) For closer-range applications, the working range of any sensor pair can be reduced by 10.6 mm (0.42 ) 2.3 mm connecting the sensors Select wire to 0-2V dc (see Specifications Sensing Range). (0.09 ) 5.9 mm 1.8 mm (0.23 ) The receiver output interfaces directly with dc loads or circuits up to 30V dc, and offers (0.07 ) both sinking (NPN) and sourcing (PNP) output transistors. Outputs conduct whenever a beam is broken. A 5 millisecond pulse stretcher (OFF-delay) is included to improve interfacing reliability. Typical Applications NOTE: (2) T-nuts and 16.8 mm (2) M5 - 0.8 x 8 screws Typical applications for the LX Series include parts ejection verification and package detec- (0.66 ) are included with each sensor tion on a conveyor. 31.8 mm M3 x 0.5 x 5 (4) (1.25 ) max. torque 1.1 Nm (10 in-lbs) 25.4 mm (1.00 ) Installation and Alignment 10.3 mm (0.4 ) Reliable performance of the LX series light screen systems requires a simple alignment Model Length (L) process. Mounting locations should be as free from vibration as possible. LX3 113.4 mm (4.46 ) LX6 189.6 mm (7.46 ) Sensors may be mounted using the accessory brackets (available separately see page LX9 265.8 mm (10.46 ) 4) or using the T-slots in the sensor housings. Loosely mount the emitter and receiver at L LX12 342.0 mm (13.46 ) their operating locations with their front panels opposite each other, and at approximately LX15 418.2 mm (16.46 ) the same level. After mechanical alignment is completed, the sensors can be wired and LX18 494.4 mm (19.46 ) power applied. LX21 570.6 mm (22.46 ) To obtain optical alignment, adjust the emitter until the receiver detects alignment (the 36 mm LX24 646.8 mm (25.46 ) (1.4 ) yellow LED turns OFF). For best alignment, position the emitter in the middle of the LED 1 LED 2 positions that cause a clear receiver condition. After alignment is achieved and the bracket hardware is tightened, position a pencil or similar object within the sensing area to verify that it can be reliably detected throughout the sensing area. Figure 2. LX features and dimensions Banner Engineering Corp. Minneapolis, MN U.S.A. www.bannerengineering.com Tel: 763.544.3164 2 P/N 108865 rev. D