Bidirectional motor-driven door with 1800 mm sliding panels high and 900 mm width of passage. Detection of presence by means of parametrisable photo-cells spread over the length of the piece of furniture that allows the detection of multiple combinations of totally programmable pass both valid and undue, passage of wheelchairs, carts, etc ... Speed of step up to 40 people per minute (proximity). "tailgating" algorithm for fraudulent step detection: step in the opposite direction, crawling and excess passing time.