Cut-off sensors

Tuesday, 29 July, 2003 | Supplied by: Micromax Pty Ltd


Banner Engineering has announced the QS30AF high-accuracy adjustable-field sensors.

Designed to sense objects in challenging applications where the target and its background have similar colour or reflective qualities, the visible red sensing beam and precision background suppression circuitry allow the sensor to detect only objects within the defined sensing field while ignoring objects beyond a cut-off point of up to 300 mm.

The QS30AF's advanced microprocessor simplifies set-up and the dynamic feedback of its 8 segment LED bargraph display adds additional flexibility, clearly showing unit status as it is constantly updating. With simple, push-button-SET programming, the user simply needs to establish a background point to be ignored or the object to be sensed.

In Dynamic SET, which is used to program the sensor during actual machine-run conditions, the sensor takes multiple samples of the reflective conditions and automatically sets the cut-off point halfway between the target and background.

Dynamic SET is programmed through a remote wire, which can also be used to disable the push-buttons to prevent tampering at the sensor.

The 10-30 VDC QS30AF background suppression sensor has a maximum output rating of 150 mA for each of its outputs. It can be set for light operate (NO) or dark operate (NC), and features a bipolar configuration with one NPN (current sinking) and one PNP (current sourcing) output.

The sensors tolerate vibration, mechanical shock and washdown. Internal circuitry guards against false pulse on power-up, continuous overload and short circuit of outputs.

The QS30AF's tough ABS/polycarbonate blend housing meets IEC IP67 and NEMA 6 standards and operates in temperatures of -10 to +55°C. The sensors are available with a 2 m PVC cable, 9 m PVC cable or 5 pin integral Euro-style quick-disconnect cable.

Online: www.micromax.com.au
Phone: 02 4223 7600
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