Node load short-circuit self-isolation circuit and method and multi-split circuit

Abstract

The invention relates to a node load short-circuit self-isolation circuit, a node load short-circuit self-isolation method and a multi-split circuit. The node load short-circuit self-isolation circuit comprises a power bus and at least one node load arranged on the power bus; isolation protection circuits in one-to-one correspondence with the node loads are also arranged between the node loads and the power bus; and the isolation protection circuit is used for monitoring whether the node load connected with the isolation protection circuit is short-circuited or not, and when the node load is short-circuited, the node load is isolated from the power bus. According to the node load short-circuit self-isolation circuit, when a certain node load is short-circuited, the load node can be effectively isolated from a power bus so as to protect output of other loads from being affected, complete isolation of a fault node is achieved, and the phenomenon of false triggering or dysfunction of the controller due to short circuit of the node load is avoided.

Description

technical field [0001] The invention relates to the technical field of short circuit protection, in particular to a node load short circuit self-isolation circuit, a method and a multi-connection circuit. Background technique [0002] During the actual test of wifi mesh network communication, it is found that when the module is short-circuited by external factors or its own reasons, it will cause the controller board to fail to output normally. In addition, the main control board of the multi-connected external unit is equipped with many loads, and most of these loads share a set of power supplies. Once a short circuit occurs in a certain load node, other loads in the entire power bus will be paralyzed and unable to work normally. [0003] CAN communication has the characteristics of fault closure. CAN can determine the wrong communication node. When continuous data errors occur on the bus, the faulty node can be isolated from the bus to keep the communication on the bus n...

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art, to provide a node load short-circuit self-isolation circuit, method and multi-line circuit to solve the current There is a problem that the controller itself cannot work normally when a short circuit occurs at a load node of the controller

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