| 摘要 |
PROBLEM TO BE SOLVED: To realize efficient heat radiation from an electric circuit, even if the electric circuit with heat generation and various input/output devices are integrated as input/output modules by a casing and the input/output modules are arranged densely. SOLUTION: In a switch module with a lamp 20 being an input/output module which has a communication circuit 50a and a lamp 42 and a switch 43, an inclined face 32a is installed in the rear wall 32 of a casing 30 and an electronic component 51 with heat generation, which is a part of a communication circuit 50a is fitted along the inclined face 32a. Even if the multiple switch modules with a lamp 20 are arrayed/arranged, since the inclined face 32a faces widely the outside, efficient heat radiation is realized. Since the electronic component 51 larger than the small casing 30 can be arranged appropriately, the input/ output module can be miniaturized for a small device part 40.
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