Introduction to MVB train communication interfaceIntroduction to MVB train communication interfaceIssuing time:2023-04-18 00:40 In order to ensure communication consistency, MVB communication has strict regulations on the physical layer, link layer, transport layer, and interface form. All MVB interfaces (excluding fiber optic) are standard dual DB9 structures (1 male and 1 female), regardless of whether they are EMD medium MVB or ESD+medium MVB. The interface form is the same, but the pin definitions are slightly different. The connection presents a bus type, with two DB9s in and out, and the end needs to be matched with a 120 ohm resistor terminator.As shown in the figure. |