JPS6221208B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a relay logic circuit that outputs a logic output. The purpose of the present invention is to form a logic circuit by operating an operating switch, reduce power consumption and reduce the DC power supply capacity, and furthermore, reduce heat generation of circuit elements to prevent control circuits and other circuits from rising in temperature. The object of the present invention is to prevent the adverse effects of air pollution and to increase the operating ambient temperature. Conventionally, sequence logic circuits using relays use monostable relays, which generate a lot of heat due to the power consumption of the relay coil, and when incorporated into a control panel, etc., this heat generation causes a rise in temperature inside the control panel. This causes various troubles due to the high voltage, and furthermore, the relay coil consumes a large amount of power, so it has the disadvantage of requiring a large-capacity power source. The present invention has been made in view of this point, and will be explained in detail below with reference to Examples. In Fig. 1, the power supply V is applied to one pole of the capacitor C, and the other pole of the capacitor C is connected to a latching relay RL.
Common contacts s ₁₀ and s ₂₀ of the operating switches S ₁ and S ₂ are connected through the . Operation switch S ₁ , S ₂
The first contacts s ₁₁ and s ₂₁ are both commonly connected and grounded. In addition, the second contact s ₁₂ of the operation switch S ₁
is connected to one pole side (power supply side) of capacitor C via resistor _R1 , and the second contact _S22 of the other operating switch _S2 is connected to one pole side of capacitor C via resistor _R2 . ing. By switching the operation switches S ₁ and S ₂ , the discharge current of the capacitor C flows through the resistors R ₁ and R ₂ , and the latching relay RL
The current flows in the opposite direction.
rl ₁ and rl ₂ are relay contacts of latching relay RL. Now, when operating switches S ₁ and S ₂ are connected to the state shown in the figure, the latching relay RL is operated by the charging current of the capacitor C from the power supply V, and the contacts rl ₁ and rl ₂ are brought into the state shown. Here, when the operating switch _S1 is turned on to the second contact _S12 side as shown by the dotted line,
The resistor _R1 is simply connected in parallel to the series circuit of the latching relay RL and the capacitor C, the latching relay RL is not reset, and the contacts _rl1 and _rl2 maintain the states shown. Next, when operating switch S ₂ is also placed on the second contact s ₂₂ side as shown by the dotted line,
The discharge current of capacitor C causes a reverse current to flow through resistors R ₁ and R ₂ to latching relay RL, and latching relay RL returns to its original state. Operation switch S ₁ ,
The state of the solid line of S ₂ is 0, the state of the dotted line is 1, and the contact point
Let the outputs of rl ₁ and rl ₂ be X as shown in the figure, then

[Table] becomes. In other words, there is an operation switch for output
AND output of S ₁ and S ₂ is obtained, and the output is NAND
I get the output. Next, the states of the solid lines in Fig. 2 of the operating switches S ₁ and S ₂ are set to 0, the states of the dotted lines are set to 1, the outputs of the contacts rl ₁ and rl ₂ are set to X as shown in Fig. 2, and the operating switches
When S ₁ is connected to the first contact s ₁₁ shown by the dotted line, the latching relay RL is operated by the charging current of the capacitor C from the power supply V, and the contacts rl ₁ and rl ₂ output the output X.
Switch to the side. The latching relay RL operates in the same way even _if the operation switch _S2 is moved to the first contact point _s21 shown by the dotted line before the operation switch S1 is moved. latching relay
Since RL is bistable, it is operated by the charging current of capacitor C, but when capacitor C is sufficiently charged, no current flows, but the contacts rl ₁ and rl ₂
will not return. Next, even if you turn either operation switch S ₁ or S ₂ to the solid line state, the latching relay will not work.
RL does not return, and when both operation switches S ₁ and S ₂ are returned to the solid line state, the resistance is reduced due to the discharge of capacitor C.
A reverse current flows through R ₁ and R ₂ to latching relay RL, and latching relay RL returns to its original state. That is,
Output X of operation switches S ₁ and S ₂ and contacts rl ₁ and rl ₂ ,
The relationship with is as follows, an OR output is obtained from the output X, and a NOR output is obtained from the output.

[Table] Also, if only operation switch _S1 is connected, NOT output can be obtained. As described above, in the present invention, the first and second operating switches are operated via a latching relay having a relay contact that outputs a logic output on the other terminal of a capacitor to which power is applied to one terminal. The commonly connected common contacts are connected, the first contacts of the first and second operating switches are commonly connected and grounded, and the second contacts of the first and second operating switches are respectively connected to one of the capacitors. Since it is connected to the terminal on the pole side via a discharge resistor, when the first and second operating switches are connected to the first contact side and power is applied to the capacitor, the capacitor will be charged. Along with
The latching relay is activated, the relay contacts are reversed, and then no matter which operating switch is connected to the second contact, a discharge circuit is not formed, so the latching relay is not activated and both operating switches are connected to the second contact.
When the switch is switched to the contact side of
It is possible to obtain output or NAND output. Also,
When power is applied to the capacitor and the operating switch is switched from the second contact side to the first contact side, the latching relay is reversed by the charging current of the capacitor, and then which operating switch is switched to the second contact side. Even when switching to the side, a discharge circuit is not formed, so the latching relay is not activated, and when both operating switches are switched to the second contact, a discharge circuit is formed, the latching relay is activated, and the relay contact is reversed. By doing so, when the operating switch is used as an input and the relay contact is used as an output, an OR output or a NOR output can be obtained from the relay contact, and therefore, a logic circuit can be formed by operating the operating switch. In addition, it is possible to reduce power consumption, reduce DC power supply capacity, reduce heat generation in latching relays and other circuit elements, prevent adverse effects on control circuits and other parts due to temperature rise, and increase the operating ambient temperature. It is effective.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of one embodiment of the relay logic circuit of the present invention, and FIG. 2 is a circuit diagram of another embodiment of the same. RL...Latching relay, C...Capacitor, _S1 ...Operation switch, _S2 ...Operation switch,
_R1 ...resistance, _R2 ...resistance, _s10 , _s20 ...common contact, _s11 , _s21 ...first contact, _s12 , _s22 ...second contact.

Claims (1)

[Claims] 1. Connect the commonly connected common contact of the first and second operating switches to the other pole of the capacitor to which power is applied to the terminal on one pole via a latching relay that has a relay contact that outputs a logic output. The first contacts of the first and second operation switches are commonly connected and grounded, and the second contacts of the first and second operation switches are respectively connected to the terminal on one pole side of the capacitor for discharging. A relay logic circuit consisting of a resistor connected through a resistor.