A bracket, comprising a body, the body comprising: a first face provided with a plurality of through holes; and a second face facing away from the first face and provided with a plurality of accommodating chambers corresponding to the plurality of through holes, wherein the plurality of accommodating chambers is configured to accommodate an input/output module fixedly mounted therein and expose the input/output module from the second face, and the plurality of through holes is configured to expose the input/output module from the first face, wherein the bracket is integrally formed, wherein the plurality of accommodating chambers comprises a first chamber, a second chamber, a third chamber, and a fourth chamber arranged in sequence, wherein the through hole comprises a first through hole, a second through hole, a third through hole, and a fourth through hole, the first through hole is in communication with the first chamber, the second through hole is in communication with the second chamber, the third through hole is in communication with the third chamber, and the fourth through hole is in communication with the fourth chamber, wherein the body comprises a side wall, the side wall connects the first face to the second face, the side wall comprises a top side wall and a bottom side wall facing away from each other, characterized in that centers of the first through hole, the third through hole and the fourth through hole are arranged on a same straight line, and the second through hole is arranged between the straight line and the bottom side wall, the top side wall has a notch, the first face has a recess, and the recess is in communication with the notch, wherein the bracket further comprises a bracket positioning column protruding from the bottom of the recess, and the bracket positioning column is arranged between the straight line and the top side wall. a first face provided with a plurality of through holes; and a second face facing away from the first face and provided with a plurality of accommodating chambers corresponding to the plurality of through holes, wherein the plurality of accommodating chambers is configured to accommodate an input/output module fixedly mounted therein and expose the input/output module from the second face, and the plurality of through holes is configured to expose the input/output module from the first face, wherein the bracket is integrally formed, wherein the plurality of accommodating chambers comprises a first chamber, a second chamber, a third chamber, and a fourth chamber arranged in sequence, wherein the through hole comprises a first through hole, a second through hole, a third through hole, and a fourth through hole, the first through hole is in communication with the first chamber, the second through hole is in communication with the second chamber, the third through hole is in communication with the third chamber, and the fourth through hole is in communication with the fourth chamber, wherein the body comprises a side wall, the side wall connects the first face to the second face, the side wall comprises a top side wall and a bottom side wall facing away from each other, characterized in that centers of the first through hole, the third through hole and the fourth through hole are arranged on a same straight line, and the second through hole is arranged between the straight line and the bottom side wall, the top side wall has a notch, the first face has a recess, and the recess is in communication with the notch, wherein the bracket further comprises a bracket positioning column protruding from the bottom of the recess, and the bracket positioning column is arranged between the straight line and the top side wall.