Multifunction vehicle bus interface device

Abstract

The invention discloses a multifunction vehicle bus interface device which comprises a case, a back plate, a control drive circuit, an interface circuit and two data interfaces connected with the interface circuit. The control drive circuit is arranged on a control circuit board, the control circuit board is inserted in a control slot of the back plate, the interface circuit is arranged on the back plate and is connected with the control drive circuit through a wire arranged on the back plate, the distance between the interface circuit and the control drive circuit is smaller than a distance threshold, the two data interfaces and the interface circuit are arranged on the back plate in a back-to-back mode, and both the two data interfaces are located on the outside of the case. The interface circuit and the two data interfaces are arranged on the back plate on the outside of the case in the back-to-back mode, the interface circuit is electrically connected with the data interfaces through wires printed on the back plate, connecting wire harnesses are saved, fixation of the data interfaces is strengthened, and electromagnetic compatibility is achieved; the interface circuit is directly arranged on the back plate, one slot in the back plate is omitted, and extension of functions of the back plate is facilitated.

Description

technical field [0001] The invention relates to the field of multifunctional train bus technology, in particular to a multifunctional train bus interface device. Background technique [0002] figure 1 Shows a schematic structural view of a Multifunction Vehicle Bus (MVB, Multifunction Vehicle Bus) interface device in the prior art, as figure 1 As shown, the multifunctional train bus interface device in the prior art includes a multifunctional train bus control drive circuit, an interface circuit, a first DB9 interface and a second DB9 interface, wherein the control circuit board 41 where the control drive circuit is located is connected to the The interface circuit board 42 where the interface circuit is located adopts a circuit board structure in which mother and child overlap, specifically: the control circuit board 41 is plugged into the first slot of the backplane 2, and the interface circuit board 42 is plugged into the first slot of the backplane 2. In the two slots,...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the defect of the multifunctional train bus interface device in the prior art: the size of the first opening and the second opening provided on the cabinet is not easy to control; the outlet wiring harness connected to the DB9 interface is inconvenient to fix; The interface extends out of the chassis through the opening, which is prone to electromagnetic compatibility; the control circuit board and the interface circuit board, which are arranged overlappingly, occupy two precious slots on the backplane, which may affect the expansion of the backplane function

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