Access control module for use in Busch-Welcome® door communication systems or stand-alone operation. Enables the door to be opened using a numeric code. The keypad can also be used to directly call Busch-Welcome® indoor stations. 256 users can be programmed. For installation in a Busch-Welcome® outdoor station. For integration in letterboxes and doorbell systems from various manufacturers, for example in products from Erwin Renz Metallwarenfabrik GmbH & Co KG, Boschstr. 3, 71737 Kirchberg/Murr. The cut-out must be created by the manufacturer. Stand-alone operation together with the system control center 83300 (power supply and connection for the electric door opener). Programming directly on the module or via a web browser (requires IP gateway 83342). Consumption units: 1 Suitable for use with the camera interface (83327) and the camera module 180° (83503).