Abstract: A device for guiding, driving, and locking a slot-in module of electrical or electronic equipment in a cabinet, wherein the circuits of the slot-in module are connected to those of the cabinet by coupling the connectors of the slot-in module to those of the cabinet or a rack in the cabinet, wherein the cabinet is secured to a slide with which a slideway secured to the slot-in module can engage, wherein a system of pinions and of racks cause their relative travel under the action of a rotary control member in a manner such that, at the end of travel, an input pinion is automatically blocked by a spring that can be unblocked from the outside.