• Balluff India

Microprocessor enabled intelligent mark sensor

Balluff India offers microprocessor controlled contrast sensor BKT, which represents another addition to the company"s line of intelligent opto sensors. In this device the microprocessor takes up the entire setup process. The user need only press two keys to setup the sensor for the mark and the background. The data are stored, so that recalibration is only required if the marking background ratio changes. The LEDs indicate which calibration step you are in. During the setup phase, the data records for the working mode, consisting of emitter colour, light on/dark on selection, and switching threshold, is automatically created. Remote control of the key functions and remote selection of 4 previously stored contrast ratios are available in the cable version depending on lead selection. It is also possible to enable a turn-off delay or to disable the buttons. The internal microprocessor, monitors and synchronizes the emitter, receiver and output circuits, for optimum switching frequency, repeatability and insensitivity to interference and ambient light. The sensor output is selectable between NPN and PNP. In both cases, the output is protected against over-voltage and short circuit. All models have an analogue output whose signal is proportional to the light intensity reflected from the target. A stable metal housing gives the sensor an IP 67 rating. The sensor lens can be placed in two positions, for setting the exit surface straight or rotated 90? from the sensor axis. For even greater installation flexibility, the connector or cable fitting can be rotated in three 90? increments.