Safety controller with data lock

A system for safely controlling at least one secure input assembly and/or output assembly, comprising:

• a controller, said controller comprising at least one data processing means for realizing a first data channel (1) and a second data channel (2);
• a data transmission means (3) connected to said first and second data channels (1, 2), wherein said data transmission means (3) is configured to transfer data from at least one of said first and second data channels (1, 2) to a higher-order device (5) that is connectable to the controller;
• and a host lock (4) wherein said host lock (4) is configured to influence the data transmission to said higher-order device (5), wherein said host lock (4) comprises bi-directional data bus drivers and uni-directional address bus drivers and is controlled via a data release signal (6),
• wherein said data transmission is realized using said data transmission means (3),
• wherein said higher-order device (5) is provided between the controller and the secure input assembly and/or output assembly, wherein said controller is configured to transfer between the controller and the secure input assembly and/or output assembly using a secure data protocol, and
• wherein at least one channel (1,2) is configured to use a physical data interface for the data exchange with the data transmission means (3), wherein said physical data interface is the same data interface that uses the data transmission means (3) to exchange data with the host lock (4).

A method for operating a controller, comprising the following steps:

• providing at least one data processing means for realizing a first data channel (1) and a second data channel (2), and comprising a data transmission means (3) connected to data channels (1, 2) in a manner such that, using data transmission means (3), data may be transferred from at least one data channel (1, 2) to a higher-order device (5) that is connectable to the controller;
• providing an active host lock (4), wherein said active host lock (4) is configured to influence the data transmission to said higher-order device (5), wherein said host lock (4) comprises bi-directional data bus drivers and uni-directional address bus drivers and is controlled via a control signal (6), wherein said data transmission is realized using said data transmission means (3);
• processing data using the data processing means;
• transmitting data using the data channels (1, 2) to the data transmission means (3), wherein at least one channel (1, 2) uses a physical data interface for the data exchange with the data transmission means (3), wherein said physical data interface is the same data interface that uses the data transmission means (3) to exchange data with the host lock (4);
• and
• influencing the data stream for a device (5) that is connectable to the controller, with consideration for a data release signal (6).