The ACC-AZM400-BOW-4M-6M is an access control device manufactured by Schmersal, a German-based company that specializes in safety technology. This device works as an unlocking mechanism, and it is a combined locking system consisting of a key switch, a keypad and a proximity reader. The key switch can be used to switch code combinations between 4 and 6 digits for ergonomically tailored access. It also features an inductive proximity reader with a memory capacity for up to 85 coding cards and/or tags. The control unit also contains a broad range of useful functions, such as privacy protection, entry and exit control and authorized access control. This device is precisely designed for a variety of industrial applications, such as security control, access control to warehouses, gates, and buildings, and will fulfill the need of all safety requirements.