S2600 control box and the back end when three or more boxes cascade connection, there are two control boxes A, B cascade control box with two links cascade ; are usually two ways to cascade, the first one is two cascaded down sequentially connecting link can be followed in the order of cascading boxes ; second way is a link in turn forward cascade (control box to connect the first cascade box), another link anti- the cascade (control box to connect the last one cascade box), the reliability of these two cascade without any distinction, when the implementation of the project which can be conveniently using what.
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