JPS6385816U

JPS6385816U -

Info

Publication number: JPS6385816U
Application number: JP18125686U
Authority: JP
Priority date: 1986-11-26
Filing date: 1986-11-26
Publication date: 1988-06-04

Description

[Brief explanation of drawings]

第１図は、この考案の一実施例を示す回路図。
第２図は、従来の入力信号切替え装置を示す図。図において、１は第１のリレー、２は第２のリ
レー、３は第３のリレー、４は共通負荷、５は電
源装置、６はロータリースイツチ、７は図示して
いない外部装置からの第１の入力信号、８は図示
していない外部装置からの第２の入力信号、９は
図示していない外部装置からの第３の入力信号、
ａはリレーの操作コイル、ｂはリレーの常開接点
、ｃはリレーの常閉接点、Ｔ_０はロータリースイ
ツチの共通端子、Ｔ_１〜Ｔ_３はロータリースイツ
チの切替え接点端子である。なお、各図中同一符
号は同一または相当部分を示す。 FIG. 1 is a circuit diagram showing an embodiment of this invention.
FIG. 2 is a diagram showing a conventional input signal switching device. In the figure, 1 is a first relay, 2 is a second relay, 3 is a third relay, 4 is a common load, 5 is a power supply, 6 is a rotary switch, and 7 is a relay from an external device (not shown). 1 input signal, 8 a second input signal from an external device not shown, 9 a third input signal from an external device not shown,
a is the operating coil of the relay, b is the normally open contact of the relay, c is the normally closed contact of the relay, _T0 is the common terminal of the rotary switch, and _T1 to _T3 are the switching contact terminals of the rotary switch. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

In an input signal switching device that switches and applies the plurality of input signals described above to a common load to which a plurality of input signals from an external device are commonly applied, each has a normally open contact and a normally closed contact. a rotary switch comprising an operating coil that energizes the input signal, and the same number of relays as the plurality of input signals, a power supply device that energizes the plurality of relays, and a rotary switch having the same number of switching contacts as the plurality of input signals, One relay is associated with each input signal, each input signal is input to the first terminal of the normally open contact of the corresponding relay, the second terminal is connected to the common load, and the first terminal of the power supply device is connected to the first terminal of the normally open contact of the corresponding relay. Connect the output terminal of No. 1 to the common terminal of the rotary switch, connect each switching contact terminal of this rotary switch to the first terminal of the operating coil of the corresponding relay, and connect the second terminal of the operating coil of this relay. The first terminal of the operating coil of this relay is connected to the first terminal of the normally closed contact of the relay connected to the switching contact terminal adjacent to the switching contact terminal of the rotary switch to which the first terminal of the normally closed contact is connected. By connecting a second terminal to a second terminal of the power supply device, a plurality of input signals from an external device applied to the common load are switched by the rotary switch and the relay. Input signal switching device.