SENSORS: LASER SENSORS aIO-Link:
configuration of sensors
utomatic
IO-Link integration provides Baumer’s miniature laser sensors with automated and repeatable accuracy. Andy Pye reports
free duplication of the system and device replacement without the need for additional programming, thereby saving time. Diagnostic data can be called up and evaluated at any time, which increases system availability. Baumer’s O300 miniature laser sensors
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are designed for the precise detection of very small objects and gaps. Thanks to a laser beam which focuses to within 0.1mm – and a high repeat accuracy of 0.1mm – objects can be positioned with high precision and follow-up processes controlled exactly. Thanks to an extremely short response time of less than 0.1ms, the sensor reliably detects even closely spaced objects, thus allowing fast processes and high throughput rates. A big advantage is qTarget – a system
which aligns the light beam of a sensor to the fixing holes. Sensors using qTarget enjoy fast and easy installation without fine- tuning. This will not only compensate for tolerances between individual components but ensures consistent alignment accuracy within the complete sensor series. The weak point of pushbuttons and
potentiometers is ruled out with a tamper- resistant, wear-free teach-in method qTeach, which allows easy, user-friendly
hanks to IO-Link integration, quick and easy configuration of sensors for all applications is possible using standard network components. This ensures error-
light touch to the housing using any ferromagnetic tool, such as a screwdriver. The engineer touches the housing once to enter the teach procedure and align the desired sensing condition, then touches it a second time to teach. A blue LED on the sensor provides clear
optical feedback during the teaching procedure, blinking to indicate when the user has activated teach mode and when the teach function has been completed. To prevent inadvertent reprogramming in the field, qTeach automatically locks out after five minutes of operation. Reflecting objects with a size of 0.5mm
can be reliably detected within a sensing distance of 250mm. Stainless steel variants in a rugged washdown and hygienic design are available for packaging plants in the food and pharmaceutical industries. LBFH and LBFI level switches are also
available from Baumer with IO-Link and ATEX approval. The sensors are suitable for hygienic and industrial applications. Just like their predecessors, LBFH and
LBFI level switches meet the criteria for ATEX categories 1 and 2 for gas and dust. The reduced current consumption of their more advanced electronics means commercially-
available standard barriers can be used in addition to the Baumer barriers. This increases flexibility in terms of integration even in existing plants, while reducing
❱❱ O300 laser sensors – object recognition in miniature format, above; CleverLevel level switch with IO-Link enables seamless communication and continuous automation, inset
commissioning of the laser sensor. Touching the photoelectric sensor housing initiates qTeach. There are no mechanical buttons or moving parts that can wear out. The system can be used on diffuse sensors with background suppression, reflector-free light barriers and retro-reflective sensors for reflective surfaces. During set-up, qTeach requires no
mechanical adjustment. The simple and convenient teach-in process begins with a
installation costs. Two switching outputs make it possible to
set independent trigger thresholds. This means two different process steps, such as production and cleaning, or two media groups, such as water and oil, can be monitored with one sensor. Additionally, the two switching outputs facilitate a plausibility check of the sensor. The complementary trigger point setting ensures wire breaks are reliably detected, thus guaranteeing effective monitoring of all programs. Both variants are suitable for use in
temperatures up to 135°C while the variant for hygiene applications also has SIP capabilities. EE
June 2018 /// Environmental Engineering /// 41
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