Rail mounting backplane kit and related rail mounting electronic device

A rail mounting electronic device comprising:

• a first module;
• a second module detachably assembled with the first module;
• a first mating module disposed between the first module and the second module, the first mating module comprising:
• a first mating structure formed on the second module, the first mating structure comprising a plurality of first mating features, each of the plurality of first mating features being a first protruding mating feature, a first flat mating feature or a first recessed mating feature;
• and
• a first cooperating structure formed on the first module, the first cooperating structure comprising a plurality of first cooperating features, each of the plurality of first cooperating features being a first protruding cooperating feature, a first flat cooperating feature or a first recessed cooperating feature;
• a third module detachably assembled with the second module;
• and
• a second mating module disposed between the second module and the third module, the second mating module comprising:
• a second mating structure formed on the third module, the second mating structure comprising a plurality of second mating features, each of the plurality of second mating features being a second protruding mating feature, a second flat mating feature or a second recessed mating feature;
• and
• a second cooperating structure formed on the second module, the second cooperating structure comprising a plurality of second cooperating features, each of the plurality of second cooperating features being a second protruding cooperating feature, a second flat cooperating feature or a second recessed cooperating feature;
• wherein when one of the plurality of first mating features is the first protruding mating feature, a corresponding one of the plurality of first cooperating features is the first recessed cooperating feature;
• wherein when one of the plurality of first mating features is the first flat mating feature, a corresponding one of the plurality of first cooperating features is the first flat cooperating feature or the first recessed cooperating feature;
• wherein when one of the plurality of first mating features is the first recessed mating feature, a corresponding one of the plurality of first cooperating features is the first protruding cooperating feature, the first flat cooperating feature or the first recessed cooperating feature;
• wherein when one of the plurality of second mating features is the second protruding mating feature, a corresponding one of the plurality of second cooperating features is the second recessed cooperating feature;
• wherein when one of the plurality of second mating features is the second flat mating feature, a corresponding one of the plurality of second cooperating features is the second flat cooperating feature or the second recessed cooperating feature;
• wherein when one of the plurality of second mating features is the second recessed mating feature, a corresponding one of the plurality of second cooperating features is the second protruding cooperating feature, the second flat cooperating feature or the second recessed cooperating feature;
• wherein when one of the plurality of second mating features is the second protruding mating feature and a corresponding one of the plurality of first cooperating features is the first flat cooperating feature or the first protruding cooperating feature, the second protruding mating feature is configured to abut against the first flat cooperating feature or the first protruding cooperating feature for preventing an assembly of the first module and the third module.