CN203554315U - Miniature PLC power supply - Google Patents
Miniature PLC power supply Download PDFInfo
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- CN203554315U CN203554315U CN201320383165.2U CN201320383165U CN203554315U CN 203554315 U CN203554315 U CN 203554315U CN 201320383165 U CN201320383165 U CN 201320383165U CN 203554315 U CN203554315 U CN 203554315U
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- direct current
- common mode
- mode inductance
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Abstract
The utility model provides a miniature PLC power supply which comprises the components of: a DC output unit which is used for connecting with the input end of a miniature PLC, an AC converting unit which is used for connecting with AC input, and an input/output multiplexing DC unit which is used for connecting with DC input or a miniature PLC auxiliary circuit. The AC converting unit and the input/output multiplexing DC unit are respectively connected with the DC output unit. The miniature PLC power supply can be connected with AC power and DC power respectively through the AC converting unit and the input/output multiplexing DC unit, and therefore the power supply is compatible for the miniature PLC equipment with different power supply modes.
Description
Technical field
The utility model relates to field of power supplies, more particularly, relates to a kind of power supply that is applied to small PLC.
Background technology
PLC(programmable logic controller (PLC)) be the electronic installation of the digital operation operation of a kind of special application under industrial environment and design.It adopts the memory that can program, the portion within it that is used for stores the instruction that actuating logic computing, sequential operation, timing, counting and arithmetical operation etc. operate, and can, by digital or analog input and output, control various types of machinery or production process.
Due to the application of PLC very extensively, application scenario is different, so the kind of PLC is also extremely many.Current small PLC also has numerous types, and the supply power mode of these small PLCs is also not quite similar, and the employing for example having exchanges 100～220V Alternating Current Power Supply, and some adopts 24V direct current supply.
The power supply of the current small PLC for different supply power modes separates, and these power supplys are not the PLC that can only be applied to direct current supply, can only be applied to exactly the PLC of Alternating Current Power Supply, and this will cause product line numerous, be unfavorable for administering and maintaining.
Utility model content
The technical problems to be solved in the utility model is, the problem of PLC that cannot compatible different power supply types for above-mentioned small PLC power supply, provides a kind of small PLC power supply.
The technical scheme that the utility model solves the problems of the technologies described above is, a kind of small PLC power supply is provided, comprise direct current output unit for connecting small-sized PLC input, for connecting, exchange the exchange conversion unit of input, for connecting the multiplexing direct current of the input and output unit of direct current input or small PLC auxiliary circuit, the multiplexing direct current of described exchange conversion unit and input and output unit is connected respectively to described direct current output unit.
In small PLC power supply described in the utility model, the multiplexing direct current of described input and output unit comprises positive binding post, negative binding post, the first common mode inductance and the second common mode inductance, described direct current output unit comprises positive output terminal, negative output terminal and is serially connected in the electrochemical capacitor between positive output terminal, negative output terminal, wherein: the positive binding post of the multiplexing direct current of described input and output unit via the first coil of the first common mode inductance, the first coil of the second common mode inductance connects the positive output terminal of direct current output unit; The negative binding post of the multiplexing direct current of described input and output unit via the second coil of the first common mode inductance, the second coil of the second common mode inductance connects the negative output terminal of direct current output unit.
In small PLC power supply described in the utility model, the multiplexing direct current of described input and output unit also comprises the first diode being serially connected between the first coil of the first common mode inductance and the first coil of the second common mode inductance.
In small PLC power supply described in the utility model, described exchange conversion unit comprises rectifier bridge and transformer, and output, output that the input of described transformer connects rectifier bridge are connected to positive output terminal and the negative output terminal of direct current output unit via the second common mode inductance.
In small PLC power supply described in the utility model, the positive voltage output end of described transformer is connected to the positive output terminal of direct current output unit via the first coil of the second diode, the 3rd diode, the first diode and the second common mode inductance, and the negative voltage output of this transformer is connected to the negative output terminal of direct current output unit via the second coil of the second common mode inductance.
In small PLC power supply described in the utility model, described exchange conversion unit also comprises optocoupler feedback circuit and switching circuit, the negative voltage input of described rectifier bridge is via switching circuit ground connection, and described optocoupler feedback circuit is according to the break-make of the input terminal voltage control switch circuit of the first coil of the second common mode inductance.
In small PLC power supply described in the utility model, between the input of the first coil of the input of described optocoupler feedback circuit and the second common mode inductance, be serially connected with current-limiting resistance.
In small PLC power supply described in the utility model, described rectifier bridge connects alternating current input via protection filter circuit.
Small PLC power supply of the present utility model has following beneficial effect: can by exchange conversion unit and the multiplexing direct current of input and output unit, be connected to alternating current and direct current respectively, thereby make the small PLC equipment of the compatible different supply power modes of this power supply.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model small PLC power supply embodiment.
Fig. 2 is the circuit diagram of the middle-size and small-size PLC power supply of Fig. 1 specific implementation.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, be the schematic diagram of the utility model small PLC power supply embodiment.Small PLC power supply in the present embodiment comprises direct current output unit 11, exchange conversion unit 12 and the multiplexing direct current of input and output unit 13, and above-mentioned exchange conversion unit 12 and the multiplexing direct current of input and output unit 13 are connected respectively to direct current output unit 11.Wherein direct current output unit 11 is for connecting small-sized PLC input, and exportable directly for the direct current of small PLC equipment; Exchange conversion unit 12 connects to exchange to be inputted and the alternating current of input can be converted to direct current; The multiplexing direct current of input and output unit 13 connects direct currents input, or is connected to the auxiliary circuit of PLC equipment and at this small PLC power acquisition, is that the auxiliary circuit of PLC equipment is powered during with Alternating Current Power Supply.
Above-mentioned small PLC power supply, for example, processes alternating current and the direct current (24V) of input respectively by exchange conversion unit 12 and the multiplexing direct current of input and output unit 13, thereby can the compatible small PLC equipment that adopts different supply power modes.And this small PLC power supply is when Alternating Current Power Supply, can be internal logic and the peripheral support circuit power supply of PLC equipment simultaneously.
As shown in Figure 2, be the electrical block diagram of the middle-size and small-size PLC power supply of Fig. 1.
The multiplexing direct current of input and output unit 13 comprises positive binding post (V+), negative binding post (V-), the first common mode inductance T1 and the second common mode inductance T2, direct current output unit 11 is for providing 24V direct current to PLC equipment, and it comprises positive output terminal (V+), negative output terminal (V-) and is serially connected in the electrochemical capacitor C1 between positive output terminal, negative output terminal.Wherein the positive binding post of the multiplexing direct current of input and output unit 13 via the first coil of the first common mode inductance T1, the first coil of the second common mode inductance T2 connects the positive output terminal of direct current output unit 11; The negative binding post of the multiplexing direct current of input and output unit 13 via the second coil of the first common mode inductance T1, the second coil of the second common mode inductance T2 connects the negative output terminal of direct current output unit 11.
Above-mentioned the first common mode inductance T1, the second common mode inductance T2 can realize the isolation that the EMC between input dc power in small PLC power supply and output direct current disturbs, reach the isolation of internal logic control circuit and external signal, improved the anti-interference of small PLC power supply.
In addition, the multiplexing direct current of above-mentioned input and output unit 13 also comprises the first diode D1 being serially connected between the first coil of the first common mode inductance T1 and the first coil of the second common mode inductance T2.Output, the negative electrode of the first coil of anodic bonding the first common mode inductance T1 of this first diode D1 connects the input of the first coil of the second common mode inductance T2.By this first diode D1, the damage of or PLC apparatus logic circuit visibly moved to electrolysis in the time of can realizing input dc power reversal connection.
Above-mentioned exchange conversion unit 12 comprises rectifier bridge and transformer, and wherein output, the output of the input of transformer connection rectifier bridge are connected to positive output terminal and the negative output terminal of direct current output unit 11 via the second common mode inductance T2.Especially, the positive voltage output end of above-mentioned transformer is connected to the positive output terminal of direct current output unit 11 via the first coil of the second diode D2, the 3rd diode D3, the first diode D1 and the second common mode inductance T2, and the negative voltage output of this transformer is connected to the negative output terminal of direct current output unit 11 via the second coil of the second common mode inductance T2.
When above-mentioned small PLC power supply passes through Alternating Current Power Supply, the direct current output unit 11 that is connected to the output of the second common mode inductance T2 can be the internal logic of PLC equipment (being PLC equipment itself) power supply.Simultaneously, because the first coil of the first common mode inductance T1 is connected with the first coil of the second common mode inductance T2, the second coil of the first common mode inductance T1 is connected with the second coil of the second common mode inductance T2, therefore exchange conversion unit 12 also can be 13 power supplies of the multiplexing direct current of input and output unit, has realized the power supply of the multiplexing direct current of input and output unit 13 for the peripheral auxiliary circuits of PLC equipment.
And when Alternating Current Power Supply, the first common mode inductance T1 and the second common mode inductance T2 can realize the EMC isolation between the direct current output of direct current output unit 11 and the direct current output of the multiplexing direct current of input and output unit 13.
For guaranteeing exchange conversion unit 12 output voltage stabilizations, exchange conversion unit 12 also can comprise optocoupler feedback circuit and switching circuit, now the negative voltage input of rectifier bridge is via switching circuit ground connection, and optocoupler feedback circuit is according to the break-make of the voltage cut-out circuit of the input of the first coil of the second common mode inductance T2.Due to after voltage sample point is arranged on the first diode D1, therefore can compensate the pressure drop of a plurality of diodes.
In above-mentioned small PLC power supply, between the input of the first coil of the input of optocoupler feedback circuit and the second common mode inductance T2, be serially connected with current-limiting resistance R1.This current-limiting resistance R1 adopts high-power resistance, thereby in the time of can preventing from adopting direct current input, input voltage surpasses designated value and damages this current-limiting resistance R1.
In addition, in above-mentioned exchange conversion unit 12, also can comprise a protection filter circuit, rectifier bridge connects alternating current input via this protection filter circuit.
The above; it is only preferably embodiment of the utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (8)
1. a small PLC power supply, it is characterized in that: comprise direct current output unit for connecting small-sized PLC input, exchange the exchange conversion unit of input for connecting, for connecting the multiplexing direct current of the input and output unit of direct current input or small PLC auxiliary circuit, the multiplexing direct current of described exchange conversion unit and input and output unit is connected respectively to described direct current output unit.
2. small PLC power supply according to claim 1, it is characterized in that: the multiplexing direct current of described input and output unit comprises positive binding post, negative binding post, the first common mode inductance and the second common mode inductance, described direct current output unit comprises positive output terminal, negative output terminal and is serially connected in the electrochemical capacitor between positive output terminal, negative output terminal, wherein: the positive binding post of the multiplexing direct current of described input and output unit via the first coil of the first common mode inductance, the first coil of the second common mode inductance connects the positive output terminal of direct current output unit; The negative binding post of the multiplexing direct current of described input and output unit via the second coil of the first common mode inductance, the second coil of the second common mode inductance connects the negative output terminal of direct current output unit.
3. small PLC power supply according to claim 2, is characterized in that: the multiplexing direct current of described input and output unit also comprises the first diode being serially connected between the first coil of the first common mode inductance and the first coil of the second common mode inductance.
4. small PLC power supply according to claim 3, it is characterized in that: described exchange conversion unit comprises rectifier bridge and transformer, output, output that the input of described transformer connects rectifier bridge are connected to positive output terminal and the negative output terminal of direct current output unit via the second common mode inductance.
5. small PLC power supply according to claim 4, it is characterized in that: the positive voltage output end of described transformer is connected to the positive output terminal of direct current output unit via the first coil of the second diode, the 3rd diode, the first diode and the second common mode inductance, and the negative voltage output of this transformer is connected to the negative output terminal of direct current output unit via the second coil of the second common mode inductance.
6. small PLC power supply according to claim 5, it is characterized in that: described exchange conversion unit also comprises optocoupler feedback circuit and switching circuit, the negative voltage input of described rectifier bridge is via switching circuit ground connection, and described optocoupler feedback circuit is according to the break-make of the input terminal voltage control switch circuit of the first coil of the second common mode inductance.
7. small PLC power supply according to claim 6, is characterized in that: between the input of the first coil of the input of described optocoupler feedback circuit and the second common mode inductance, be serially connected with current-limiting resistance.
8. according to the small PLC power supply described in any one in claim 4-6, it is characterized in that: described rectifier bridge connects alternating current input via protection filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320383165.2U CN203554315U (en) | 2013-06-28 | 2013-06-28 | Miniature PLC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320383165.2U CN203554315U (en) | 2013-06-28 | 2013-06-28 | Miniature PLC power supply |
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| Publication Number | Publication Date |
|---|---|
| CN203554315U true CN203554315U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320383165.2U Expired - Fee Related CN203554315U (en) | 2013-06-28 | 2013-06-28 | Miniature PLC power supply |
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| CN (1) | CN203554315U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302053A (en) * | 2018-11-14 | 2019-02-01 | 无锡信捷电气股份有限公司 | Portable PLC program download apparatus |
-
2013
- 2013-06-28 CN CN201320383165.2U patent/CN203554315U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302053A (en) * | 2018-11-14 | 2019-02-01 | 无锡信捷电气股份有限公司 | Portable PLC program download apparatus |
| CN109302053B (en) * | 2018-11-14 | 2024-04-12 | 无锡信捷电气股份有限公司 | Portable PLC program downloading device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20190628 |
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| CF01 | Termination of patent right due to non-payment of annual fee |