Field device
A field device and temperature switch technology, applied in electrical equipment shell/cabinet/drawer, printed circuit, program control, etc., can solve the problems of complex structure and difficult miniaturization of field equipment, and achieve miniaturization and low cost. Effect
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no. 1 approach
[0059] figure 2 It is a functional block diagram showing a schematic configuration of the field device 1 of the first embodiment. The field device 1 of the first embodiment includes a main unit 200 and a case 300 housing the main unit 200 . The configuration of the main unit 200 included in the field device 1 is the same as that of the main unit 200 described in the comparative example. Therefore, the illustration and description of the detailed functional modules inside the main unit 200 are omitted here.
[0060] The field device 1 of the present embodiment is connected to the sensor 600 in the same manner as the field device 10 of the comparative example. In addition, the field device 1 of the present embodiment is configured to be connected to the power supply 100 and to receive supply of electric power from the power supply 100 in the same manner as the field device 10 of the comparative example.
[0061] The field device 1 of this embodiment includes a first temperat...
no. 2 approach
[0073] Figure 4 It is a functional block diagram showing a schematic configuration of the field device 2 of the second embodiment. The field device 2 of the second embodiment includes, like the field device 1 of the first embodiment, a case 300 , a main unit 200 housed in the case 300 , a first temperature switch 400 , and a heating element 500 . Hereinafter, the common points between the field device 2 of the second embodiment and the field device 1 of the first embodiment will be appropriately omitted, and the differences will be mainly described.
[0074] The field device 2 in this embodiment further includes a second temperature switch 401 . Such as Figure 4 As shown, the second temperature switch 401 is connected to the power supply 100 in series with the heating element 500 and in parallel with the main unit 200 and the first temperature switch 400 . The second temperature switch 401 is accommodated in the casing 300 . The second temperature switch 401 is a switch ...
no. 3 approach
[0083] Figure 6 It is a functional block diagram showing a schematic configuration of the field device 3 of the third embodiment. The field device 3 of the third embodiment includes, like the field device 1 of the first embodiment, a case 300 , and a main unit 200 and a first temperature switch 400 accommodated in the case 300 . Hereinafter, the common points between the field device 3 of the third embodiment and the field device 1 of the first embodiment will be appropriately omitted, and the differences will be mainly described.
[0084] The field device 3 of the third embodiment includes at least one other power generating element switchable with the power generating element 500 in addition to the heat generating element 500 . Figure 6 An example of a case where a plurality of other heating elements are included is shown in . Furthermore, the field device 3 includes a toggle switch 700 . The changeover switch 700 is accommodated in the housing 300 .
[0085] The other...
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