MICROPROCESSOR-BASED SLOT SENSORS FOR LABELLING AND PACKAGING High 25 kHz switching frequency IR or red/green light models Detection of semi-transparent labels Detection of register marks on transparents 4 wire antivalent NPN and PNP output SR21 SERIES The slot sensors of the SR21 series, with 2 mm slot width, are characterised by a high 12 bit (4096 steps) resolution, a low 20 s response time and a switching frequency reaching 25 kHz. The setting of the switching threshold is carried-out automatically by simply pressing a push-button, or dynamically during label (or other reference) movement. The SR21-IR model with infrared emission is ideal for label or hole detection on continuous surfaces, while the SR21-RG model with double red or green emission suits colour print register mark detection on transparent films for automatic packaging. SLOT SENSORSTECHNICAL DATA Power supply: ............................................... 10 ... 30 Vdc, reverse polarity protection Consumption: ............................................... 55 mA max. Light emission: ............................................. infrared LED 880 nm (IR vers.) red 635 nm/green LED 535 nm (RG vers.) Resolution: ....................................................0.5 mm Slot width: ..................................................... 2 mm Slot depth: .....................................................50 mm Detection point depth: ................................. 7.5 mm Setting: .......................................................... AUTO SET push-button Indicators: ..................................................... yellow OUTPUT LED green/red bicolour READY/ERROR LED Output type: .................................................. NPN and PNP, Rpull-down/up 10 k Saturation voltage: ....................................... 2 V max. Output current: ............................................. 100 mA max., short-circuit protection Response time: .............................................20 s max. Switching frequency: ................................... 25 kHz Operating mode: ...........................................dark/light configurable Connection: ...................................................M8 4-pole connector Electrical protection: ....................................class 1 Mechanical protection: ................................ IP65 Housing material: ......................................... ZAMA Lens material: ............................................... glass Weight: .......................................................... 120 g max. Operating temperature: ............................... -20 ... +60C Storage temperature: ................................... -20 ... +70C Reference standard: ..................................... EN 60947-5-2 Certifications: ............................................... UNI EN ISO9001 UNI EN ISO14000