普林柯 princo：射频导纳物位控制器 l2000-220avc-l843 l2000-220vac/l843/150mm-450mm l2000-220vac/l843w/300-23.5m description the 42js visisight family of sensors offers a full range of sensing modes in miniature rectangular housing. visible light source is offered in all models for ease of alignment. additional transmitted beam infrared status-indicator source models are offered for excellent crosstalk immunity. the 42js visisight family provides an indication if the sensor operation is unstable. an indicator flashes if the signal level is too close to the detection threshold. this indicator helps in easy alignment of the sensor and forewarns against detection of a background. features visible light source that is offered on all models for ease of alignment optional snap-on adapter for 18 mm mounting patented asic design offers linear sensitivity adjustment, stability indication, and excellent noise immunity compact sealed housing and cavity-free design to minimize collection of dust and debris while allowing for easy sensor cleanup threaded metal m12 or m8 connector on pigtail 360° visible status indicators additional transmitted beam models available with infrared light source for excellent cross talk immunity input to disable light source on transmitted beam emitter 1. verify that the sensitivity knob is set at its maximum (factory default) setting. 2. pan the sensor to the left, right, up, and down to center the beam on the sensed object (for diffuse), reflector (for retroreflective), or transmitter (for transmitted beam). affix the sensor position when the green status indicator is on (not flashing) and the yellow output indicator is on (light sensed and l.o. output energized). this configuration assures a good margin and that the signal received is greater than twice the signal that is required to energize the l.o. output. 3. a. for diffuse applications, remove the object being sensed and observe the green status indicator. if the green indicator is flashing (at 6 hz), the sensor is receiving more than half the signal required to energize the l.o. output when there can be minimal or no received signal. it indicates that the sensor is getting close to detection of the background. stability can be optimized by reducing the reflectivity of the background or reducing the sensitivity. reduce the sensitivity to shorten the sensing range. if sensitivity is reduced, check that both the green and yellow indicators are on when the object is detected (step 2). in applications where the full range is needed, for example, sensitivity cannot be reduced, the green indicator can be left flashing. b. for retroreflective and transmitted beam applications, place the object to be sensed in the beam path and observe the green indicator. if the green indicator is flashing (at 6?hz), that sensor is receiving more than half the signal required to energize the l.o. output when there can be minimal or no signal received. it indicates that the object being detected is letting some light go through (semi-transparent or too small). adjust sensitivity and repeat step 2. crosstalk avoidance for applications of transmitted-beam sensors which require adjacent pairs to be mounted close, use the red indicator and infrared indicator pairs as adjacent pairs. the following spacing (center to center) between the adjacent pairs can be maintained to avoid crosstalk: 1. red indicator pair that is adjacent to the infrared indicator pair: a. 60 mm (2.4 in.) for sensing range up to 1.6 m (4.8 ft) b. 20 mm (0.8 in.) for sensing range greater than 1.6 m (4.8 ft) 2. two adjacent pairs of red indicator models or two adjacent pairs of infrared indicators: 360 mm (14 in.)