Patent ID: 7486169

Claim:
A control and/or monitoring device, comprising: a number of peripheral devices; a control central processing unit; a communication network connecting the control central processing unit to the various peripheral devices; and an independent, second electrical security circuit selectively adopting a security configuration or an anomaly configuration, the security circuit being separate from the communication network, the security circuit forms a dedicated electrically conductive closed loop in the security configuration, which is broken in the anomaly configuration, each peripheral device at all times being subject to a condition which affects it at least partially, that belongs to a number of possible conditions including a reference condition that corresponds to a normal operating condition, and for which the peripheral device selectively reports as a context code, the control central processing unit includes at least a first transmission controller which has, for each peripheral device, a stored reference code formed by the context code transmitted by the peripheral device for its reference condition, which takes the context code of each of the peripheral devices by periodic polling of the peripheral devices according to a predetermined addressing order, which carries out comparisons of the context codes one by one that have been taken by polling of the peripheral devices and stored reference codes stored in the transmission controller, and which commands the passage of the security circuit from the security configuration to the anomaly configuration in response to a detection of an absence of one of the codes to be compared or a disparity between the codes compared.