Security device for building-related passenger conveyor system

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

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