Functionality and structure of a complex system with nearly autonomic devices

When we have a complex system, it is important to have integrated devices which are independent or at least almost independent. This ensures the proper functioning of the system, although a device (unit) breaks down, which does not cause a chain reaction of errors or failures in the system or a break down of the whole system. In this article we will give an example of an existing system, which is built with a large number of devices. The devices differ from some functionalities and housing, but all of them work nearly autonomous and support the basic functions of the system. In the article we explain the connections and communication types between the devices; as well we indicate the level of independence of them and reasons of dependence.