Security device for building-related passenger conveyor system

A safety device for a building-related passenger transport system, the safety device comprising:

• a microcontroller having a memory, a processor and a communication interface;
• a safety module stored in the memory and, when executed on the processor, the safety module receives safety-relevant signals from components of the passenger transport system, evaluates the safety-related signals with regard to a predetermined safety problem, and transmits a warning signal to a controller of the passenger transport system when the safety-related signals indicate the safety problem;
• an update module stored in the memory and, when executed on the processor, the update module receives a software package via the communication interface and updates at least parts of the safety module with the software package;
• wherein the microcontroller is configured such that the safety module is only able to be amended by the update module;
• wherein the processor has a first processor core on which the safety module is executed;
• wherein the processor has a second processor core on which the update module is executed;
• and
• wherein the microcontroller restricts access of the second processor core to regions of the memory in which the safety module is stored.