Importance

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Abstract

An extensible, programmable digital electronic network (14A') originates from a network node (FIG. 1), including a base node microcomputer (90) and a network interface (71C), and is operatively connected to a power supply (61), and at least one separate, network communicating circuit or network node (21), which is connected to at least one application device (21A). Enclosing cases of the network components includes an access sensor (8, 18C, and 22F, respectively) and power storage units (24G, 18B, and 22H, respectively) for fail-safe functions. The application device is programmably controlled by the base node microcomputer, a network security main program (100), a separate circuit or node, and a node security main program (130) to cause the network to selectably effect control of a device, for example, upon loss of network integrity, such that the network and node, respectively, enter programmably secure conditions (125, 155). These conditions include disconnecting the power supply from certain controlled system circuits including vehicle engine starting or ignition (5B') or one or more nodes causing application devices to function.

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First Claim