CN102419568B - Input circuit and input device - Google Patents
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- CN102419568B CN102419568B CN201110288305.3A CN201110288305A CN102419568B CN 102419568 B CN102419568 B CN 102419568B CN 201110288305 A CN201110288305 A CN 201110288305A CN 102419568 B CN102419568 B CN 102419568B
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Abstract
The invention relate to an input circuit which is used to input a leakage signal and a source signal from an external device and an input device. The input device is provided with the input circuit. When a mode corresponding to the leakage input is selected by a DIP switch, a control device turns off a p type MOSFET and turns on an n type MOSFET. When an operator connects an external power supply with a second input terminal by mistake, a big current passes through the n type MOSFET. When a current bigger than a rated current passes through an FET, a fuse is cut off immediately, so the FET can be not damaged. When a mode corresponding to the source input is selected by the DIP switch, the p type MOSFET is turned on and the n type MOSFET is turned off. The input current can be switched into the leakage type or the source type without replacing a bottom plate.
Description
Technical field
The present invention relates to a kind of from external unit input leakage type signal or the input circuit of source type signal and the input media with this input circuit.
Background technology
Generally, the numerical control device of lathe possesses output circuit and input circuit.Output circuit is to the external unit output signal that can be connected with lathe.From external unit to input circuit input signal.When externally the input/output signal of equipment is source type signal, in numerical control device, use the imput output circuit corresponding with source type.When externally the input/output signal of equipment is leakage type signal, in numerical control device, use the imput output circuit corresponding with leakage type.Operator changes the imput output circuit of numerical control device so that the type of the type of the imput output circuit of numerical control device and the input/output signal of external unit is consistent.
In No. 3700315th, Japan special permission communique, the numerical control device that can change imput output circuit portion is disclosed.Numerical control device possesses fixing base and handling substrate.Handling substrate can be installed on fixing base and unload from fixing base.Fixing base possesses control part.Handling substrate possesses the imput output circuit portion of terminal base, leakage type or source type.
The control part of above-mentioned fixing base shares in the imput output circuit portion of leakage type and source type.Numerical control device is changed the handling substrate that possesses leakage type imput output circuit portion and the handling substrate that possesses source type imput output circuit portion, comes corresponding with the input/output signal of external unit.
Operator need to prepare two kinds of handling substrates in advance.In this case, the manufacturing expense of numerical control device increases.When handling substrate being switched to leakage to type or source type, need to change operation.To the switching of leakage type or source type and be not easy.
For fear of the replacing of substrate, can utilize the on/off of on-off element that input terminal is switched to leakage type or source type.When external unit is connected to input circuit, operator is connected external unit with the input terminal corresponding with this external unit.When operator has been unfamiliar with the corresponding relation of the input terminal that connected operation or operator's wrong identification and external unit, operator may be connected to external power source the input terminal of the ground connection by on-off element.
Having connected under the state of on-off element, when operator is connected to input terminal by external power source, large electric current flows through on-off element.When having flow through the electric current of the capacity that surpasses on-off element, on-off element will damage.
The input media that the object of the present invention is to provide a kind of input circuit and possess this input circuit, when input terminal being switched to leakage to type or source type, do not need to change substrate, when power supply is connected to input terminal mistakenly, can prevent the damage of on-off element.
Summary of the invention
for the scheme of dealing with problems
First invention of this case relates to a kind of input circuit, from first input end of leakage type or the second input terminal input signal of source type, it is characterized in that, possesses selection portion, this selection portion is selected above-mentioned first input end or above-mentioned the second input terminal, between above-mentioned first input end and power supply unit, be connected in parallel to the first resistance and the first on-off element, the fuse that is connected with parallel circuit and is connected in series with this parallel circuit between above-mentioned the second input terminal and grounding parts, this parallel circuit is the parallel circuit of the second resistance and second switch element, when utilizing above-mentioned selection portion, selected the above-mentioned first input end period of the day from 11 p.m. to 1 a.m, above-mentioned the first on-off element is disconnected and make above-mentioned second switch element switches, when utilizing above-mentioned selection portion to select above-mentioned the second input terminal, above-mentioned the first on-off element is connected and above-mentioned second switch element is disconnected.
The input circuit of the first invention is utilizing selection portion to select the first input end period of the day from 11 p.m. to 1 a.m, the first on-off element is disconnected and make second switch element switches.When by other end side joint when ground of fuse, the second input terminal is via second switch element and fuse ground connection.When mistakenly external power source being connected to the second input terminal, large electric current flows through second switch element, and fuse cuts off at once.Therefore, input circuit can prevent the damage of second switch element.
When utilizing selection portion to select the second input terminal, input circuit is connected the first on-off element and second switch element is disconnected.Therefore,, when input terminal being switched to leakage to type or source type, do not need to carry out complicated operation.Owing to using fuse, while therefore cutting off the IC (integrated circuit) of electric current with use, compare, can cut down the manufacturing expense of input circuit.
Second invention of this case is in the first invention, also possesses control device, this control device has for the port from above-mentioned the second input terminal input signal and controls switching on and off of above-mentioned the first on-off element and switching on and off of above-mentioned second switch element, and above-mentioned control device detects the cut-out of above-mentioned fuse according to the signal from above-mentioned port input.
The input circuit of the second invention will utilize selection portion to select the first input end period of the day from 11 p.m. to 1 a.m under the state on the other end side joint ground of fuse, second switch element switches.The second input terminal is via second switch element and fuse ground connection.The second input terminal is connected with control device." L " signal to control device input electronegative potential.When operator is connected to the second input terminal by power supply mistakenly, large electric current flows through, and fuse cuts off.The ground connection of the second input terminal is removed, " H " signal of input noble potential from the second input terminal to control device.
Because the cut-out of fuse 92 makes to become " H " from the input signal of the second input terminal from " L ", so control device detects excess current and has flow through second switch element.
When utilizing selection portion to select the second input terminal, input " H " signal or " L " signal from the second input terminal to control device.Can utilize same structure to realize the detection from the signal input of the second input terminal and the excess current of second switch element, therefore can not make input circuit become complicated.
The 3rd invention of this case and the 4th invention are in the first invention and the second invention, can change above-mentioned fuse.
The input circuit of the 3rd invention and the 4th invention is changed the fuse having cut off, and recovers rapidly input circuit.
The 5th invention of this case to the 8th invention is that above-mentioned the first on-off element and above-mentioned second switch element are FET in the first invention to the four inventions.
The 5th invention owing to using FET (field effect transistor) as the first on-off element and second switch element, therefore realizes input terminal to the switching of leakage type or source type to the 8th input circuit of inventing reliably.
The 9th invention of this case relates to a kind of input media, it is characterized in that, possesses one first input circuit and other input circuit described in any one of inventing in inventing to the 8th, and above-mentioned other input circuit has: the 3rd input terminal of leakage type; Four-input terminal of source type; Selection mechanism, it selects above-mentioned the 3rd input terminal or above-mentioned four-input terminal; The 3rd resistance and the 3rd on-off element, they are connected in parallel between above-mentioned the 3rd input terminal and power supply unit; And the 4th resistance and the 4th on-off element, they form parallel circuit, this parallel circuit is connected between above-mentioned four-input terminal and grounding parts via fuse, when utilizing above-mentioned selection mechanism to select above-mentioned the 3rd input terminal, above-mentioned the 3rd on-off element is disconnected and above-mentioned the 4th on-off element is connected, when utilizing above-mentioned selection mechanism to select the above-mentioned four-input terminal period of the day from 11 p.m. to 1 a.m, above-mentioned the 3rd on-off element is connected and above-mentioned the 4th on-off element is disconnected.
The input media of the 9th invention, when using a plurality of input circuit, is made as the structure that except an input circuit other input circuit does not possess fuse.The 4th resistance of other input circuit and the 4th on-off element, via the fuse ground connection of an input circuit, therefore can share fuse, cut down manufacturing expense.While flowing through excess current in the second switch element of any input circuit, fuse cuts off.Input media utilizes a fuse to protect the second switch element of each input circuit.Input media detects in some input circuits and has flow through excess current in second switch element.
Accompanying drawing explanation
Fig. 1 is the input circuit figure of embodiment 1.
Fig. 2 is the constitutional diagram of the DIP switch of each pattern.
Fig. 3 is the circuit diagram while external power source being connected to the second input terminal mistakenly in leakage type input associative mode.
Fig. 4 is the circuit diagram of the input media of embodiment 2.
Embodiment
embodiment 1
Fig. 1 is the input circuit figure of embodiment 1.Input circuit 1 is located in the numerical control device of lathe, is arranged on not shown substrate.Input circuit 1 possesses control device 10, this control device 10 and DIP (Dual In-line Package: dual-in-line package) switch 70 (selection portion) is connected with terminal base 11.In the drawings DIP switch is expressed as to DIP SW.
Field programmable gate array), ASIC (Application Specific Integrate d Circuit: special IC) or microcomputer control device 10 for example possesses FPGA (Field Programmable Gate Arr ey:.Control device 10 possesses input port 61,62 and output port 63,64.The selection of control device 10 based on DIP switch 70 controlled described later to FET (Field Effect Transistor: driving field effect transistor).Control device 10 moves with the signal of 3.3V system.
Input circuit 1 possesses first input end 21, p-type MO SFET 31 (the first on-off element, hereinafter referred to as FET 31), the first resistance 41 and the first change-over circuit 51.First input end 21 is connected with external unit.FET 31 is connected with first input end 21.The first resistance 41 is connected with first input end 21 with power supply 91.The first 51 pairs of change-over circuits voltage is changed.
FET 31 and the first resistance 41 are connected in parallel between power supply 91 and first input end 21.Power supply 91 protection FET 31 avoid the impact of excess current, and the voltage of 24V is provided.External unit moves with the signal of 24V system.
First input end 21 is connected with the input port 61 of control device 10 via the first change-over circuit 51.First input end 21 is connected with the drain electrode of FET 31.The source electrode of FET 31 is connected with power supply 91.The grid of FET 31 is connected with the output port 63 of control device 10.The driving signal of output port 63 output FET 31.
Input circuit 1 possesses the second input terminal 22, fuse 92, N-shaped MOSFET32 (second switch element, hereinafter referred to as FET 32), the second resistance 42 and the second change-over circuit 52.
The second input terminal 22 is connected with external unit.An end ground connection of fuse 92.FET 32 is connected with the second input terminal 22 with another end of fuse 92.The second resistance 42 is connected with another end of the second input terminal 22 and fuse 92.The second 52 pairs of change-over circuits voltage is changed.FET 32 and the second resistance 42 are connected in parallel between the second input terminal 22 and another end of fuse 92.
The second input terminal 22 is connected with the input port 62 of control device 10 via the second change-over circuit 52.The second input terminal 22 is connected with the drain electrode of FET 32.The source electrode of FET 32 is via fuse 92 ground connection.Fuse 92 is to compare fully little failure of current with rated current.Rated current is the electric current that becomes the benchmark that prevents that FET 32 from damaging.Fuse 92 can be changed.
The grid of FET 32 is connected with the output port 64 of control device 10.The driving signal of output port 64 output FET 32.
Terminal base 11 possesses a plurality of ports.On each port, configure first input end the 21 and second input terminal 22.
DIP switch 70 is selected leakage type input associative mode or source type input associative mode.Leakage type input associative mode is the state of the signal from external unit to control device 10 input electronegative potentials via first input end 21.Source type input associative mode is the state of the signal from external unit to control device 10 input noble potentials via the second input terminal 22.
As shown in the A of Fig. 2, when operator is set as DIP switch 70 to connect, input circuit 1 becomes leakage type input associative mode.When DIP switch 70 is set as disconnecting, input circuit 1 becomes source type input associative mode.
When leakage type input associative mode, control device 10 makes FET 31 cut-offs, makes the gate turn-on of FET32.Power supply 91 is connected via the first resistance 41 with first input end 21.From the second input terminal 22 to control device 10, always input " L " signal (signal of 0V) (with reference to the B of Fig. 2) of electronegative potential.The second input terminal 22 provides the voltage of 0V.
When first input end 21 is connected with external unit with the second input terminal 22, the internal switch of external unit is connected, first input end 21 is connected with the second input terminal 22, the second input terminal 22 is low level.From first input end 21 to control device 10 input " L " signals.When the internal switch of external unit disconnects and while cutting off first input end 21 and the second input terminal 22, first input end 21 applied and utilizes the supply voltage drawing on the first resistance 41." H " signal from from first input end 21 to control device 10 input noble potentials.First input end 21 becomes leakage type input terminal (with reference to the B of Fig. 2).
When source type input associative mode, control device 10 make FET 31 gate turn-on, make the grid cut-off of FET 32.Power supply 91 is directly connected with first input end 21.From first input end 21, to control device 10, always input " H " signal (signal of 24V) (with reference to the B of Fig. 2).First input end 21 provides supply voltage (24V).The second input terminal 22 is via the second resistance 42 ground connection.
When external unit is connected with the second input terminal 22 with first input end 21, the internal switch of external unit is connected, first input end 21 is connected with the second input terminal 22, first input end 21 is noble potential." H " signal from from the second input terminal 22 to control device 10 input noble potentials.When the internal switch of external unit disconnects and while cutting off first input end 21 and the second input terminal 22, the second input terminal 22 inputs are utilized to the drop-down earthing potential of the second resistance 42, " L " signal from the second input terminal 22 to control device 10 input electronegative potentials.The second input terminal 22 becomes source type input terminal (with reference to the B of Fig. 2).
The first change-over circuit 51 is converted to the voltage corresponding with control device 10 (3.3V) by " H " signal (voltage) from first input end 21 to control device 10 inputs.The second change-over circuit 52 is converted to the voltage corresponding with control device 10 (3.3V) by " H " signal (voltage) from the second input terminal 22 to control device 10 inputs.
As mentioned above, when leakage type input associative mode, FET 32 conductings, the second input terminal 22 is via FET 32 and fuse 92 ground connection.From the second input terminal 22 to control device 10 input " L " signals.When operator is connected to the second input terminal 22 by external power source 80 (with reference to Fig. 3) mistakenly, large electric current can flow to FET 32 and fuse 92 (with reference to the dotted arrow of Fig. 3) from the second input terminal 22.Fuse 92 is to compare fully little failure of current with the rated current of FET 32.As shown in Figure 3, when having inputted than the larger electric current of rated current from the second input terminal 22 to FET 32, fuse 92 cuts off at once, and FET 32 can not damage.
By the cut-out of fuse 92 from external power source 80 to the second input terminal 22 high input voltages.The potential rise of the second input terminal 22.From the second input terminal 22 to control device 10 input " H " signals.When having inputted " H " signal from the second input terminal 22, control device 10 detects fuse 92 and cuts off (FET 32 has been inputted to excess current).When fuse 92 cut-out being detected, control device 10 drives the notifying devices such as lamps or hummer, impels operator to change fuse 92.
When first input end 21 ground connection under source type input associative mode, large electric current flows through FET 31.Power supply 91 protection FET 31 avoid the impact of excess current.For example power supply 91 possesses power protecting circuit.When the electric current larger than rated current flows through FET 31, power supply 91 cuts off immediately to the electric current supply of FET 31.
When utilizing DIP switch 70 to select leakage type input associative mode, input circuit 1 makes FET 31 cut-offs, makes FET 32 conductings.When operator is connected to the second input terminal 22 by external power source 80 mistakenly, large electric current flows through FET 32.When the electric current larger than rated current flows through FET 32, fuse 92 cuts off at once.Therefore, FET 32 can not damage.When utilizing DIP switch 70 to select source type input associative mode, make FET 31 conductings, make FET 32 cut-offs.Operator utilizes DIP switch 70 that input circuit 1 is switched to leakage type or source type.Operator does not need to change substrate.
When utilizing DIP switch 70 to select leakage type input associative mode and mistakenly external power source 80 be connected to the second input terminal 22, fuse 92 cuts off.Before fuse 92 cuts off, the second input terminal 22 ground connection." L " signal to control device 10 input electronegative potentials.After fuse 92 cuts off, the ground connection of the second input terminal 22 is removed." H " signal to control device 10 input noble potentials.From the input signal of the second input terminal 22, from " L ", become " H " because of the cut-out of fuse 92.Therefore, control device 10 detects excess current and has flow through FET 32.
When utilizing DIP switch 70 to select source type input associative mode, the second input terminal 22 is connected with control device 10.From the second input terminal 22 to control device 10 input " H " signal or " L " signals.With identical structure, realize the input of signal and the detection of the excess current in FET 32 from the second input terminal 22.Therefore, input circuit 1 becomes simple.By the fuse 92 to having cut off, change and can recover rapidly input circuit 1.Fuse 92 also can be fixed on substrate.Now, by changing substrate, change fuse 92.
Can also by IC, (for example IPD (Integrated Product Development: integrated product development)) be connected between FET 32 and earth terminal and prevents excess current, and from IC to control device 10, output represents to detect the signal of excess current.Now, need to connect the wiring of IC and control device 10.
When using than the more cheap fuse 92 of IC, can utilize the existing wiring that connects the second input terminal 22 and control device 10, therefore do not need new wiring.
Input circuit 1 can be also by FET 32 and the second resistance 42 ground connection, and fuse 92 is connected to the second input terminal 22, and fuse 92 and FET 32 and the second resistance 42 are connected in series.When selecting leakage type input associative mode or source type input associative mode, also can replace DIP switch 70 with switch.As push-button switch, tumbler switch etc.Also can replace FET with other on-off element.As transistor, IGBT (insulated gate bipolar transistor) etc.
Control device 10 moves with the signal of 3.3V system.External unit moves with the signal of 24V system.The operation voltage of control device 10 and external unit is not limited to this.As long as utilize the first change-over circuit 51 and the second change-over circuit 52, suitably change the operation voltage of external unit and control device 10.
embodiment 2
As shown in Figure 4, input media 100 possesses the first input circuit (input circuit) 1a and the second input circuit (another input circuit) 1b.The first input circuit 1a is identical with the input circuit 1 of embodiment 1.The second input circuit 1b possesses control device 80, and this control device 80 is connected with terminal base 110 with DIP switch 90 (selection mechanism).
Control device 80 for example possesses FPGA, ASIC or microcomputer.Control device 80 possesses input port 81,82 and output port 83,84.Control device 80 carries out the driving to FET described later by the selection of DIP switch 90 and controls.Control device 80 moves with the signal of 3.3V system.
Input circuit 1b possesses the 3rd input terminal 23, p-type MO SFET 33 (the 3rd on-off element, hereinafter referred to as FET 33), the 3rd resistance 43 and the 3rd change-over circuit 53.The 3rd input terminal 23 is connected with external unit.FET 33 is connected with the 3rd input terminal 23 with power supply 93 (power supply unit).The 3rd resistance 43 is connected between power supply 93 and the 3rd input terminal 23.The 3rd 53 pairs of change-over circuits voltage is changed.
FET 33 and the 3rd resistance 43 are connected in parallel between power supply 93 and the 3rd input terminal 23.Power supply 93 protection FET 33 avoid the impact of excess current.Power supply 93 provides the voltage of 24V.External unit moves with the signal of 24V system.
The 3rd input terminal 23 is connected with the input port 81 of control device 80 via the 3rd change-over circuit 53.The 3rd input terminal 23 is connected with the drain electrode of FET 33.The source electrode of FET 33 is connected with power supply 93.The grid of FET 33 is connected with the output port 83 of control device 80.The driving signal of output port 83 output FET 33.
Input circuit 1b possesses four-input terminal 24, N-shaped MOSFET 34 (the 4th on-off element, hereinafter referred to as FET 34), the 4th resistance 44 and the 4th change-over circuit 54.
Four-input terminal 24 is connected with external unit.Four-input terminal 24 is connected with the drain electrode of FET 34.An end of the 4th resistance 44 is connected with four-input terminal 24.The 4th 54 pairs of change-over circuits voltage is changed.
Four-input terminal 24 is connected with the input port 82 of control device 80 via the 4th change-over circuit 54.The source electrode of FET 34 is via fuse 92 ground connection of the first input circuit 1a.Another end of the 4th resistance 44 is via fuse 92 ground connection.
The grid of FET 34 is connected with the output port 84 of control device 80.The driving signal of output port 84 output FET 34.Terminal base 110 possesses a plurality of ports.On each port, configure the 3rd input terminal 23 and four-input terminal 24.
When utilizing DIP switch 90 to select, the action of input circuit 1b is identical with the input circuit 1 of embodiment 1, therefore omits detailed explanation.
When utilizing the DIP switch 70 of the first input circuit 1a and the DIP switch 90 of the second input circuit 1b to select leakage type input associative mode and mistakenly external power source being connected to the second input terminal 22 or during four-input terminal 24, fuse 92 cuts off.Before fuse 92 cuts off, the second input terminal 22 and four-input terminal 24 ground connection." L " signal from from the second input terminal 22 to control device 10 input electronegative potentials." L " signal from from four-input terminal 24 to control device 80 input electronegative potentials.After fuse 92 cuts off, the ground connection of the second input terminal 22 and four-input terminal 24 is removed.From external power source to the second input terminal 22 with four-input terminal 24 high input voltages." H " signal from from the second input terminal 22 to control device 10 input noble potentials." H " signal from from four-input terminal 24 to control device 80 input noble potentials.From the input signal of the second input terminal 22 and four-input terminal 24, from " L ", become " H " because of the cut-out of fuse 92, so each control device 10,80 detects excess current and flows through FET 32 or FET 34.
About input media 100, make another end of the 4th resistance 44 and the source electrode of FET 34 via fuse 92 ground connection of the first input circuit 1a.The second input circuit 1b does not need special-purpose fuse.When excess current flows through FET 32 or FET 34, fuse 92 cuts off, and can utilize a fuse 92 to protect FET 32 and FET 34.Input media 100 monitors the input signal of the second input terminal 22 and four-input terminal 24, and detection of excessive current flows through the situation of FET 32 or FET 34.
Input media 100 also can possess three above input circuits.Now, only an input circuit possesses fuse 92, and other input circuit does not possess fuse.The 4th resistance 34 of other input circuit and the source electrode of FET 44 are via fuse 92 ground connection of an input circuit.
The operation voltage of control device 80 and external unit is not limited to 3.3V, 24V.The 3rd change-over circuit 53 and the 4th change-over circuit 54 are suitably changed the operation voltage of external unit and control device 80.
In the structure of the input media 100 of embodiment 2, the structure identical with embodiment 1 is accompanied by identical Reference numeral, and omits its detailed explanation.
Claims (9)
1. an input circuit, from first input end of leakage type or the second input terminal input signal of source type, is characterized in that,
Possess selection portion, this selection portion is selected above-mentioned first input end or above-mentioned the second input terminal,
Between above-mentioned first input end and power supply unit, be connected in parallel to the first resistance and the first on-off element,
The fuse that is connected with parallel circuit and is connected in series with this parallel circuit between above-mentioned the second input terminal and grounding parts, this parallel circuit is the parallel circuit of the second resistance and second switch element,
When utilizing above-mentioned selection portion, selected the above-mentioned first input end period of the day from 11 p.m. to 1 a.m, above-mentioned the first on-off element is disconnected and make above-mentioned second switch element switches, when utilizing above-mentioned selection portion to select above-mentioned the second input terminal, above-mentioned the first on-off element is connected and above-mentioned second switch element is disconnected.
2. input circuit according to claim 1, is characterized in that,
Also possess control device, this control device has for the port from above-mentioned the second input terminal input signal, and this control device controls switching on and off of switching on and off of above-mentioned the first on-off element and above-mentioned second switch element,
Above-mentioned control device detects the cut-out of above-mentioned fuse according to the signal from above-mentioned port input.
3. input circuit according to claim 1, is characterized in that,
Can change above-mentioned fuse.
4. input circuit according to claim 2, is characterized in that,
Can change above-mentioned fuse.
5. input circuit according to claim 1, is characterized in that,
Above-mentioned the first on-off element and above-mentioned second switch element are FET.
6. input circuit according to claim 2, is characterized in that,
Above-mentioned the first on-off element and above-mentioned second switch element are FET.
7. input circuit according to claim 3, is characterized in that,
Above-mentioned the first on-off element and above-mentioned second switch element are FET.
8. input circuit according to claim 4, is characterized in that,
Above-mentioned the first on-off element and above-mentioned second switch element are FET.
9. an input media, is characterized in that,
Possess one according to the input circuit described in any one in claim 1 to 8 and other input circuit,
Above-mentioned other input circuit has:
The 3rd input terminal of leakage type;
Four-input terminal of source type;
Selection mechanism, it selects above-mentioned the 3rd input terminal or above-mentioned four-input terminal;
The 3rd resistance and the 3rd on-off element, they are connected in parallel between above-mentioned the 3rd input terminal and power supply unit; And
The 4th resistance and the 4th on-off element, they form parallel circuit, and this parallel circuit is connected between above-mentioned four-input terminal and grounding parts via above-mentioned fuse,
When utilizing above-mentioned selection mechanism to select above-mentioned the 3rd input terminal, above-mentioned the 3rd on-off element is disconnected and above-mentioned the 4th on-off element is connected, when utilizing above-mentioned selection mechanism to select the above-mentioned four-input terminal period of the day from 11 p.m. to 1 a.m, above-mentioned the 3rd on-off element is connected and above-mentioned the 4th on-off element is disconnected.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-214193 | 2010-09-24 | ||
| JP2010214193A JP5459161B2 (en) | 2010-09-24 | 2010-09-24 | Input circuit and input device |
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| CN102419568A CN102419568A (en) | 2012-04-18 |
| CN102419568B true CN102419568B (en) | 2014-08-13 |
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| CN106896775B (en) * | 2015-12-21 | 2020-03-20 | 施耐德电气工业公司 | Output circuit for programmable logic controller |
| CN112596462B (en) * | 2020-12-22 | 2022-04-22 | 深圳市英威腾电气股份有限公司 | Output method, device and system based on signal type |
| CN114498547B (en) * | 2022-01-11 | 2024-06-18 | 深圳市有为信息技术发展有限公司 | Configurable CAN terminal resistor matching circuit |
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| JP4133646B2 (en) * | 2003-07-29 | 2008-08-13 | サンクス株式会社 | Signal output circuit, detection switch and multi-optical axis photoelectric switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3564920B2 (en) * | 1997-03-07 | 2004-09-15 | 三菱電機株式会社 | Control unit interface circuit |
| JP3767625B2 (en) * | 2005-02-10 | 2006-04-19 | 三菱電機株式会社 | Control board |
| JP4807431B2 (en) * | 2009-03-30 | 2011-11-02 | ブラザー工業株式会社 | Input interface circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0738408A (en) * | 1993-07-19 | 1995-02-07 | Sharp Corp | Buffer circuit |
| US5821783A (en) * | 1993-07-19 | 1998-10-13 | Sharp Kabushiki Kaisha | Buffer circuits with changeable drive characteristic |
| JP4133646B2 (en) * | 2003-07-29 | 2008-08-13 | サンクス株式会社 | Signal output circuit, detection switch and multi-optical axis photoelectric switch |
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| Publication number | Publication date |
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| JP5459161B2 (en) | 2014-04-02 |
| JP2012070266A (en) | 2012-04-05 |
| CN102419568A (en) | 2012-04-18 |
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