Laser fork light barriers with IO-Link

After the red light fork light barriers of type OG were already equipped with IO-Link in 2019 and we gained consistently positive experience with it, ipf electronic has now also decided to integrate an IO-Link interface in the laser fork light barriers of type PG. In view of the constantly growing digitalization of production landscapes, this is certainly an important further development in the direction of Industry 4.0 with many advantages for our customers.


The fork light barriers are parameterized with an IO-Link master (e.g. VY000005), whereby a total of 4 operating modes are available: standard (switching frequency up to 5,000Hz and a reproducibility up to 0.05mm), high resolution (increased resolution min. 0.03mm for small parts detection), power mode (higher transmission power with increased functional reserve for improved contamination compensation) and the speed mode with a switching frequency up to 10,000Hz. Further setting options include the selection of the switching output (push-pull, PNP or NPN) and the switching function (NC, NO). A switch-on or switch-off delay can also be assigned to the switching output. To simplify the setting of process values, e.g. the size of an object to be detected, several teach-in variants have been integrated. Thus, either individual values can be teached in (single value teach-in), values can be determined during the running process (dynamic teach-in) or two teach points (two value teach-in) can be taught in in order to realize a switching threshold at the output.


In addition, the fork light barriers have a diagnostic function for assessing process stability, device status and teach-in quality. Current process values, piece counters, the temperature of the device, min/max values and teach-in switching points can now also be called up. This means that the previous range of devices can be reduced to one solution per size, which can be used flexibly and at the same time offers a wide range of options for obtaining valuable data to increase process reliability. Although the new solutions impress with their added intelligence, their handling remains as usual: the sensitivity of the light barrier can still be set manually, for example, as can the response sensitivity via a potentiometer. The output function (NO/NC) can also still be preselected via a rotary switch.


The new laser fork light barriers are available with 4 different fork widths (30, 50, 80 and 120mm). The housings of the fork light barriers are made of zinc die casting and are powder coated, which makes them more resistant than painted housings. The optics are made of glass. The forks have a push-pull output stage and can therefore be used as PNP or NPN systems. The operating voltage is 10...30V; the output current is 100mA. The forks have laser protection class 1 and are connected via an M8-connector.