translate to german: An access control code keyboard is a security system in which users gain access to a secured area by entering a specific code on a keyboard. These codes can be programmed by the system administrator and can be changed as needed.

Access control code keyboards can be used in conjunction with other security methods, such as cards or biometric data, to grant or deny access to an area. They can be installed on doors or other access points and can be connected to a central computer or server to collect and manage access data.

Access control code keyboards are a popular and affordable option for security because they are easy to install and use. However, they may also have limitations such as the fact that codes can be memorized or shared with others and that they are vulnerable to mistakes or abuse.