CN210867278U - DC48V intelligent PLC distribution box - Google Patents
DC48V intelligent PLC distribution box Download PDFInfo
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- CN210867278U CN210867278U CN201922163859.5U CN201922163859U CN210867278U CN 210867278 U CN210867278 U CN 210867278U CN 201922163859 U CN201922163859 U CN 201922163859U CN 210867278 U CN210867278 U CN 210867278U
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Abstract
The utility model relates to a DC48V intelligent PLC block terminal, including the block terminal body, be equipped with the PLC controller in the block terminal body, moulded case circuit breaker and power control module, power control module includes primary control circuit and secondary control circuit, the block terminal body surface is equipped with the display screen, mains supply passes through moulded case circuit breaker and links to each other with primary control circuit, secondary control circuit respectively, secondary control circuit includes control switch, three-gear knob switch, a way delay circuit and two-way delay circuit, a way delay circuit includes auxiliary relay KA1, start button FS1 and alternating current contactor KM 1; the two-way delay circuit comprises an intermediate relay KA2, a starting button FS2 and an alternating current contactor KM 2; the PLC controller is respectively connected with the display screen, the coil of the intermediate relay KA1 and the coil of the intermediate relay KA2, and the PLC controller is in communication connection with the upper computer. This application sets up switching power supply outside this internal, display screen of block terminal, and the switching power supply of being convenient for maintains, accords with the more frivolous pursuit of display screen simultaneously.
Description
Technical Field
The utility model relates to an intelligent switch board technical field especially relates to a DC48V intelligent PLC switch board.
Background
Generally, be equipped with the display screen device in the intelligence PLC block terminal, switching power supply sets up inside the display screen device for convert outside alternating voltage into direct current voltage, for the power supply of display screen device. However, the traditional switching power supply is easy to break down, the installation setting increases the difficulty of the maintenance of the display screen device, and the switching power supply is arranged in the display screen device, so that the thickness of the display screen is increased, and the pursuit of the display screen industry on lighter and thinner display screen is not met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a DC48V intelligent PLC block terminal convenient to switching power supply maintenance, and accord with the frivolous pursuit of display screen.
For realizing the purpose of the utility model, the utility model adopts the following technical scheme:
the utility model provides a DC48V intelligent PLC block terminal, includes the block terminal body, this internal PLC controller, moulded case circuit breaker and the power control module of being equipped with of block terminal, power control module includes primary control circuit and secondary control circuit, block terminal body surface is equipped with the display screen, and commercial power AC380V power passes through moulded case circuit breaker respectively with primary control circuit secondary control circuit links to each other, primary control circuit includes 3 first control scheme and 3 second control scheme, between the live wire L1 of commercial power AC380V power and zero line N, between live wire L2 and the zero line N, be equipped with one respectively between live wire L3 and the zero line N first control scheme with the second control scheme, every first control scheme is including the AC contactor KM1 contact, first miniature circuit breaker and the first DC48V switching power supply who establishes ties in proper order, every second control scheme is including the AC contactor KM2 normally open contact, the normally open contact that establish ties in proper order, A second miniature circuit breaker and a second DC48V switching power supply, the first DC48V switching power supply and the second DC48V switching power supply for providing DC48V power to the display screen;
the secondary control loop comprises a control switch, a three-gear knob switch and a delay circuit, the delay circuit comprises a delay circuit and two paths of delay circuits, and the delay circuit comprises a stop button SB1, an intermediate relay KA1 normally closed contact, a start button FS1, an alternating current contactor KM1 coil, an alternating current contactor KM1 normally open contact and an intermediate relay KA1 normally open contact; the first end of the control switch is connected with the live wire L3, the second end of the control switch is connected with the fixed contact of the third-gear knob switch, the first movable contact of the third-gear knob switch is connected with the first end of the normally-open contact of the intermediate relay KA1, the second end of the normally-open contact of the intermediate relay KA1 is connected with the first end of the coil of the alternating current contactor KM1, and the second end of the coil of the alternating current contactor KM1 is connected with the zero line N; a second movable contact of the third-gear knob switch is connected with a first end of the stop button SB1, a second end of the stop button SB1 is connected with a first end of the start button FS1 through the intermediate relay KA1 normally-closed contact, a second end of the start button FS1 is connected with a first end of the coil of the AC contactor KM1, and a normally-open contact of the AC contactor KM1 is connected with the start button FS1 in parallel;
the two-way delay circuit comprises a stop button SB2, an intermediate relay KA2 normally closed contact, a start button FS2, an alternating current contactor KM2 coil, an alternating current contactor KM2 normally open contact and an intermediate relay KA2 normally open contact; a first end of a normally open contact of the intermediate relay KA2 is connected with a first movable contact of the three-gear knob switch, a second end of the normally open contact of the intermediate relay KA2 is connected with a first end of a coil of the alternating current contactor KM2, and a second end of the coil of the alternating current contactor KM2 is connected with the zero line N; a first end of the stop button SB2 is connected with a second movable contact of the three-position knob switch, a second end of the stop button SB2 is connected with a first end of the start button FS2 through the intermediate relay KA2 normally-closed contact, a second end of the start button FS2 is connected with a first end of the AC contactor KM2 coil, and a normally-open contact of the AC contactor KM2 is connected with the start button FS2 in parallel;
the PLC controller respectively with the display screen intermediate relay KA1 coil the intermediate relay KA2 coil links to each other, the PLC controller passes through the serial ports and links to each other with host computer communication.
Compared with the traditional intelligent PLC distribution box, the switching power supply is arranged in the distribution box body and outside the display screen, so that the limitation that the traditional switching power supply is required to be arranged in the display screen is broken, the switching power supply is convenient to maintain, and the power supply is easy to check and replace when the power supply fails; meanwhile, the display screen without the switching power supply is lighter and thinner, and the pursuit of the display screen industry for lighter and thinner is met.
In one embodiment, the secondary control loop further comprises an emergency stop button, and the emergency stop button is connected between the control switch and the third-gear knob switch in series.
In one embodiment, the delay circuit further comprises an indicating unit, the indicating unit comprises an indicating lamp GR1 and an indicating lamp GR2, the indicating lamp GR1 is connected with the coil of the alternating current contactor KM1 in parallel, and the indicating lamp GR2 is connected with the coil of the alternating current contactor KM2 in parallel.
In one of them embodiment, still be equipped with radiator, temperature and humidity controller, smoke transducer, relay and alarm in the block terminal body, the relay includes the relay coil and receives the relay contact of relay coil control, the relay coil the radiator temperature and humidity controller smoke transducer the alarm respectively with the PLC controller links to each other, commercial power AC380V power loops through moulded case circuit breaker, the relay contact respectively with primary control circuit, secondary control circuit links to each other.
In one embodiment, the distribution box body is further provided with a voltage detection circuit and a current detection circuit, the voltage detection circuit comprises a voltmeter and 3 live wire voltage indication circuits, the live wire voltage indication circuits are respectively arranged between the live wire L1 and the zero wire N, between the live wire L2 and the zero wire N, and between the live wire L3 and the zero wire N, each live wire voltage indication circuit comprises a safety seat and a power indicator lamp which are sequentially connected in series, and the voltmeter is used for displaying the input voltage of the distribution box in operation; the current detection circuit comprises 3 current detection circuits, wherein one current detection circuit is arranged between the live wire L1 and the ground wire PE, between the live wire L2 and the ground wire PE, and between the live wire L3 and the ground wire PE, the current detection circuit comprises a current transformer and an ammeter which are sequentially connected in series.
In one embodiment, an arrester is further arranged in the distribution box body, and the arrester is connected between the live wire and the zero wire N in series.
In one embodiment, the outer surface of the distribution box body is further provided with a guide rail socket, and the guide rail socket is connected between the live wire L3 and the neutral wire N in series.
In one embodiment, the PLC controller adopts a PLC programmable controller with the model number of FXIN-14 MR-01.
In one embodiment, the alternating current contactor KM1 and the alternating current contactor KM2 both adopt an alternating current contactor with the model number CJX 2-3210/32A.
In one embodiment, the first miniature circuit breaker and the second miniature circuit breaker are miniature circuit breakers of the model NXB-63/D321P.
Drawings
FIG. 1 is a schematic diagram of a primary control loop according to an embodiment;
FIG. 2 is a schematic diagram of a secondary control loop according to an embodiment;
fig. 3 is a schematic structural diagram of a DC48V intelligent PLC distribution box in an embodiment;
FIG. 4 is a schematic circuit diagram of a secondary control loop in another embodiment;
FIG. 5 is a schematic circuit diagram of a voltage detection circuit according to an embodiment;
fig. 6 is a schematic circuit diagram of a current detection circuit according to an embodiment.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present invention, "a plurality" means at least one, e.g., one, two, etc., unless specifically limited otherwise.
Referring to fig. 1 to 3, this embodiment provides a DC48V intelligent PLC distribution box, which includes a distribution box body, a PLC controller is disposed in the distribution box body, a molded case circuit breaker QF0 and a power control module are disposed in the distribution box body, the power control module includes a primary control loop and a secondary control loop, a display screen is disposed on an outer surface of the distribution box body, a commercial power AC380V power supply is respectively connected to the primary control loop and the secondary control loop through a molded case circuit breaker QF0, the primary control loop includes 3 first control lines and 3 second control lines, a first control line and a second control line are disposed between a live line L1 and a null line N, a live line L2 and a null line N, and a first control line and a second control line are disposed between a live line L3 and a null line N, each first control line includes an AC contactor KM1 normally open contact, a first miniature circuit breaker and a first DC48V switching power supply which are sequentially connected in series, and specifically, the first control line and the second control line are, The first control circuits between the live wire L2 and the zero wire N and between the live wire L3 and the zero wire N correspondingly comprise a micro circuit breaker QF1, a micro circuit breaker QF2 and a micro circuit breaker QF 3; each second control circuit comprises an alternating current contactor KM2 normally open contact, a second miniature circuit breaker and a second DC48V switching power supply which are sequentially connected in series, and specifically, the second control circuits which are arranged between a live wire L1 and a zero line N, between a live wire L2 and the zero line N and between a live wire L3 and the zero line N correspondingly comprise a miniature circuit breaker QF4, a miniature circuit breaker QF5 and a miniature circuit breaker QF 6; the first DC48V switching power supply and the second DC48V switching power supply are used to provide DC48V power to the display screen.
The secondary control loop comprises a control switch QF8, a three-gear knob switch SB0 and a time delay circuit, the time delay circuit comprises a path of time delay circuit and two paths of time delay circuits, and the path of time delay circuit comprises a stop button SB1, an intermediate relay KA1 normally closed contact, a start button FS1, an alternating current contactor KM1 coil, an alternating current contactor KM1 normally open contact and an intermediate relay KA1 normally open contact; the first end of the control switch QF8 is connected with a live wire L3, the second end of the control switch QF8 is connected with a fixed contact a of a third-gear knob switch SB0, a first movable contact b of the third-gear knob switch SB0 is connected with the first end of a normally open contact of an intermediate relay KA1, the second end of the normally open contact of the intermediate relay KA1 is connected with the first end of a coil of an alternating current contactor KM1, and the second end of the coil of the alternating current contactor KM1 is connected with a zero line N; the second movable contact c of the third-gear knob switch SB0 is connected with the first end of a stop button SB1, the second end of the stop button SB1 is connected with the first end of a start button FS1 through an intermediate relay KA1 normally closed contact, the second end of the start button FS1 is connected with the first end of an alternating current contactor KM1 coil, and a normally open contact of the alternating current contactor KM1 is connected with the start button FS1 in parallel.
The two-way delay circuit comprises a stop button SB2, a normally closed contact of an intermediate relay KA2, a start button FS2, an alternating current contactor KM2 coil, a normally open contact of an alternating current contactor KM2 and a normally open contact of an intermediate relay KA 2; the first end of a normally open contact of the intermediate relay KA2 is connected with a first movable contact b of a third-gear knob switch SB0, the second end of the normally open contact of the intermediate relay KA2 is connected with the first end of a coil of an alternating current contactor KM2, and the second end of the coil of the alternating current contactor KM2 is connected with a zero line N; the first end of the stop button SB2 is connected with the second movable contact c of the third-gear knob switch SB0, the second end of the stop button SB2 is connected with the first end of the start button FS2 through the normally closed contact of the intermediate relay KA2, the second end of the start button FS2 is connected with the first end of the coil of the alternating current contactor KM2, and the normally open contact of the alternating current contactor KM2 is connected with the start button FS2 in parallel.
The PLC controller is respectively connected with the display screen, the intermediate relay KA1 coil and the intermediate relay KA2 coil, and the PLC controller is in communication connection with the upper computer through a serial port.
In the embodiment, the control switch QF8 can adopt a miniature circuit breaker with the model number of NXB-63/C61P, and the molded case circuit breaker QF0 can adopt a miniature circuit breaker with the model number of NM1 LE-125S/63A; the miniature circuit breakers QF 1-QF 6 can adopt miniature circuit breakers with the model number of NXB-63/D321P; the alternating current contactor KM1 and the alternating current contactor KM2 can adopt alternating current contactors with the model number of CJX 2-3210/32A; the PLC controller can adopt a PLC programmable controller with the model number of FXIN-14 MR-01.
The operating principle of the DC48V intelligent PLC block terminal that this embodiment provided does: the commercial power AC380V power supply is accessed from the molded case circuit breaker QF0, and the closed molded case circuit breaker QF0 can supply power to the primary control loop and the secondary control loop. A control switch QF8 in the secondary control loop is closed, at the moment, a working mode can be selected through a third-gear knob switch SB0, when the third-gear knob switch SB0 rotates to the second movable contact c, namely, the current working mode is selected to be a manual mode, and at the moment, the coil of the alternating current contactor KM1 and the coil of the alternating current contactor KM2 can be respectively controlled to be electrified by closing a starting button FS1 and a starting button FS 2; when the third gear knob switch SB0 rotates to first movable contact b, current working mode selection is automatic mode promptly, accessible host computer sends the instruction under the automatic mode and gives the PLC controller, the PLC controller receives and responds after the instruction, control intermediate relay KA1 coil, intermediate relay KA2 coil is electrified, thereby make intermediate relay KA1 normally open contact and intermediate relay KA2 normally open contact closed, make alternating current contactor KM1 coil and alternating current contactor KM2 coil electrified. Then, micro circuit breakers QF 1-1F 6 in a first control circuit and a second control circuit in a primary control circuit are opened, a mains supply AC380V power supply supplies power to a first DC48V switching power supply and a second DC48V switching power supply through the micro circuit breakers QF 1-1F 6, and the first DC48V switching power supply and the second DC48V switching power supply convert alternating current voltage into DC48V voltage to supply power to a display screen.
Compared with the traditional intelligent PLC distribution box, the switching power supply is arranged in the distribution box body and outside the display screen, so that the limitation that the traditional switching power supply is required to be arranged in the display screen is broken, the switching power supply is convenient to maintain, and the power supply is easy to check and replace when the power supply fails; meanwhile, the display screen without the switching power supply is lighter and thinner, and the pursuit of the display screen industry for lighter and thinner is met.
Specifically, in order to reduce the impact on a power grid when the display screen is powered on, the display screen can be powered on in a delayed manner step by step through a preinstalled program, namely, the alternating current contactor KM1 in one-way delay circuit and the alternating current contactor KM2 in two-way delay circuit can be automatically controlled by software to be powered on step by step, so that each-way delay circuit is started and operated at a certain interval of time, for example, 3-4 seconds, the electronic elements in the display screen can be effectively protected and prevented from being punctured and aged by instantaneous large surge current through the step-by-step delayed power-on, and the service life of.
In one embodiment, referring to fig. 4, the secondary control circuit further comprises an emergency stop button DJ connected in series between the control switch QF8 and the third knob switch SB 0.
In this embodiment, the secondary control loop further comprises an emergency stop button DJ, and when the power distribution cabinet needs emergency stop in case of special situations in the normal working process, the emergency stop button DJ can be pressed down to achieve the effect of instant stop.
In one embodiment, referring to fig. 4, the delay circuit further comprises an indicating unit, wherein the indicating unit comprises an indicating lamp GR1 and an indicating lamp GR2, the indicating lamp GR1 is connected in parallel with the coil of the ac contactor KM1, and the indicating lamp GR2 is connected in parallel with the coil of the ac contactor KM 2.
In this embodiment, the indicator lamp GR1 and the indicator lamp GR2 may be respectively used to indicate the operating states of the ac contactor KM1 coil and the ac contactor KM2 coil, and specifically, when the ac contactor KM1 coil and the ac contactor KM2 coil are powered on, the indicator lamp GR1 and the indicator lamp GR2 are turned on, and the design of the indicator lamps facilitates an operator to visually check the operating states of the ac contactor KM1 coil and the ac contactor KM2 coil.
In one embodiment, referring to fig. 1 and 3, a radiator Fan, a temperature and humidity controller CVT, a smoke sensor SM, a relay K1 and an alarm are further arranged in the distribution box body, the relay K1 includes a relay K1 coil and a relay K1 contact controlled by the relay K1 coil, the relay K1 coil, the radiator Fan, the temperature and humidity controller CVT, the smoke sensor SM and the alarm are respectively connected with the PLC controller, and the mains supply AC380V power supply is respectively connected with the primary control loop and the secondary control loop through a plastic casing circuit breaker QF8 and the relay K1 contact in sequence.
In this embodiment, a radiator Fan, a temperature and humidity controller CVT and a smoke sensor SM are further arranged in the distribution box body, the temperature and humidity controller CVT can measure the temperature and humidity inside the distribution box body, when the humidity measurement value inside the distribution box body exceeds a limit value, the PLC controller can control the relay K1 coil to act, so that the relay K1 contact is disconnected, the external power supply input is cut off, and therefore all devices in the distribution box stop working, and meanwhile the PLC controller controls the alarm to send a humidity alarm prompt; when the temperature in the distribution box body is too high, the PLC controls the radiator Fan to be automatically started to achieve the purpose of cooling, and specifically, the radiator Fan can be an axial flow Fan; the smoke sensor SM can detect smoke conditions inside the box body in real time, when emergency conditions such as fire of components and parts occur inside the distribution box body, the PLC can control the coil of the relay K1 to act, so that the contact of the relay K1 is disconnected, the input of an external power supply is cut off, all the components in the distribution box stop working, and meanwhile the PLC controls the alarm to give out smoke alarm prompts; and the PLC is also used for sending the detected information such as the temperature value, the humidity value, the smoke value and the working/stopping times of the distribution box in the box body to a display screen for displaying, or sending the information to an upper computer for displaying.
In an embodiment, referring to fig. 5 and 6, the distribution box body is further provided with a voltage detection circuit and a current detection circuit, the voltage detection circuit includes a voltmeter V and 3 live wire voltage indication circuits, a live wire L1 and a null wire N, a live wire L2 and a null wire N, and a live wire L3 and a null wire N are respectively provided therebetween, each live wire voltage indication circuit includes a safety seat and a power indicator lamp which are sequentially connected in series, the voltmeter V is used for displaying an input voltage of the distribution box, specifically, the live wire voltage indication circuit between the live wire L1 and the null wire N includes a safety seat FU1 and a power indicator lamp HR1, the live wire voltage indication circuit between the live wire L2 and the null wire N includes a safety seat FU2 and a power indicator lamp HR2, and the live wire voltage indication circuit between the live wire L3 and the null wire N includes a safety seat FU3 and a power indicator lamp HR 3; current detection circuit includes 3 current detection circuit, between live wire L1 and the ground wire PE, between live wire L2 and the ground wire PE, be equipped with a current detection circuit between live wire L3 and the ground wire PE respectively, every current detection circuit is including current transformer and the ampere meter that establishes ties in proper order, specifically, current detection circuit between live wire L1 and the zero line N includes current transformer TA1 and ampere meter A1, current detection circuit between live wire L2 and the zero line N includes current transformer TA2 and ampere meter A2, current detection circuit between live wire L3 and the zero line N includes current transformer TA3 and ampere meter A3.
In the embodiment, the power indicator HR1, the power indicator HR2, and the power indicator HR3 are used for indicating a three-phase power supply to play a role in warning; the current transformer TA1, the current transformer TA2 and the current transformer TA3 are used for detecting input current on a three-phase live wire (L1, L2 and L3); the ammeter A1, the ammeter A2 and the ammeter A3 are used for displaying three-phase live wire current input when the distribution box works; voltmeter V is used for detecting and displaying the input voltage of the work of the display distribution box, and is convenient for operators to check.
In one embodiment, referring to fig. 1, a lightning arrester SPD is further disposed in the distribution box body, and the lightning arrester SPD is connected in series between the three-phase live wire (L1, L2, L3) and the neutral wire N.
In this embodiment, still be equipped with arrester SPD in the block terminal body, arrester SPD can avoid components and parts to avoid high transient overvoltage harm in the block terminal. Specifically, the lightning arrester SPD can adopt a lightning arrester with the model number NU 6-II/4P.
In one embodiment, referring to fig. 1, the outer surface of the distribution box body is further provided with a track socket CZ which is connected in series between the live line L3 and the neutral line N.
In this embodiment, the outer surface of the distribution box body is further provided with a guide rail socket CZ, and the guide rail socket CZ is used for fault maintenance or other additional equipment power supply. Specifically, the rack socket CZ may employ a 10A rack socket.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a DC48V intelligent PLC block terminal, includes the block terminal body, its characterized in that, this internal PLC controller, moulded case circuit breaker and the power control module of being equipped with of block terminal, power control module includes primary control circuit and secondary control circuit, block terminal body surface is equipped with the display screen, and commercial power AC380V power passes through moulded case circuit breaker respectively with primary control circuit secondary control circuit links to each other, primary control circuit includes 3 first control scheme and 3 second control scheme, be equipped with one respectively between live wire L1 of commercial power AC380V power and the zero line N, between live wire L2 and the zero line N, between live wire L3 and the zero line N first control scheme with the second control scheme, every first control scheme is including the AC contactor KM1 normally open contact, first miniature circuit breaker and the first DC48V switching power supply that establish ties in proper order, each second control line comprises an alternating current contactor KM2 normally open contact, a second miniature circuit breaker and a second DC48V switching power supply which are sequentially connected in series, wherein the first DC48V switching power supply and the second DC48V switching power supply are used for providing DC48V power for the display screen;
the secondary control loop comprises a control switch, a three-gear knob switch and a delay circuit, the delay circuit comprises a delay circuit and two paths of delay circuits, and the delay circuit comprises a stop button SB1, an intermediate relay KA1 normally closed contact, a start button FS1, an alternating current contactor KM1 coil, an alternating current contactor KM1 normally open contact and an intermediate relay KA1 normally open contact; the first end of the control switch is connected with the live wire L3, the second end of the control switch is connected with the fixed contact of the third-gear knob switch, the first movable contact of the third-gear knob switch is connected with the first end of the normally-open contact of the intermediate relay KA1, the second end of the normally-open contact of the intermediate relay KA1 is connected with the first end of the coil of the alternating current contactor KM1, and the second end of the coil of the alternating current contactor KM1 is connected with the zero line N; a second movable contact of the third-gear knob switch is connected with a first end of the stop button SB1, a second end of the stop button SB1 is connected with a first end of the start button FS1 through the intermediate relay KA1 normally-closed contact, a second end of the start button FS1 is connected with a first end of the coil of the AC contactor KM1, and a normally-open contact of the AC contactor KM1 is connected with the start button FS1 in parallel;
the two-way delay circuit comprises a stop button SB2, an intermediate relay KA2 normally closed contact, a start button FS2, an alternating current contactor KM2 coil, an alternating current contactor KM2 normally open contact and an intermediate relay KA2 normally open contact; a first end of a normally open contact of the intermediate relay KA2 is connected with a first movable contact of the three-gear knob switch, a second end of the normally open contact of the intermediate relay KA2 is connected with a first end of a coil of the alternating current contactor KM2, and a second end of the coil of the alternating current contactor KM2 is connected with the zero line N; a first end of the stop button SB2 is connected with a second movable contact of the three-position knob switch, a second end of the stop button SB2 is connected with a first end of the start button FS2 through the intermediate relay KA2 normally-closed contact, a second end of the start button FS2 is connected with a first end of the AC contactor KM2 coil, and a normally-open contact of the AC contactor KM2 is connected with the start button FS2 in parallel;
the PLC controller respectively with the display screen intermediate relay KA1 coil the intermediate relay KA2 coil links to each other, the PLC controller passes through the serial ports and links to each other with host computer communication.
2. The DC48V intelligent PLC distribution box of claim 1, wherein the secondary control loop further comprises an emergency stop button connected in series between the control switch and the third gear knob switch.
3. The DC48V intelligent PLC distribution box of claim 1, wherein the delay circuit further comprises an indication unit, the indication unit comprises an indication lamp GR1 and an indication lamp GR2, the indication lamp GR1 is connected in parallel with the AC contactor KM1 coil, and the indication lamp GR2 is connected in parallel with the AC contactor KM2 coil.
4. The DC48V intelligent PLC distribution box of claim 1, wherein a heat sink, a temperature and humidity controller, a smoke sensor, a relay and an alarm are further arranged in the distribution box body, the relay comprises a relay coil and a relay contact controlled by the relay coil, the heat sink, the temperature and humidity controller, the smoke sensor and the alarm are respectively connected with the PLC, and a mains supply AC380V power supply is sequentially connected with the molded case circuit breaker and the relay contact and is respectively connected with the primary control loop and the secondary control loop.
5. The DC48V intelligent PLC distribution box of claim 1, wherein the distribution box body is further provided with a voltage detection circuit and a current detection circuit, the voltage detection circuit comprises a voltmeter and 3 live wire voltage indication circuits, one live wire voltage indication circuit is respectively arranged between the live wire L1 and the zero line N, between the live wire L2 and the zero line N, and between the live wire L3 and the zero line N, each live wire voltage indication circuit comprises a fuse holder and a power indicator lamp which are sequentially connected in series, and the voltmeter is used for displaying an input voltage of the operation of the distribution box; the current detection circuit comprises 3 current detection circuits, wherein one current detection circuit is arranged between the live wire L1 and the ground wire PE, between the live wire L2 and the ground wire PE, and between the live wire L3 and the ground wire PE, the current detection circuit comprises a current transformer and an ammeter which are sequentially connected in series.
6. The DC48V intelligent PLC distribution box of claim 1, wherein an arrester is further disposed within the distribution box body, the arrester being connected in series between the live line and the neutral line N.
7. The DC48V intelligent PLC distribution box of claim 1, wherein a rail socket is further disposed on an outer surface of the distribution box body, and the rail socket is connected in series between the live line L3 and the neutral line N.
8. The DC48V intelligent PLC distribution box of claim 1, wherein the PLC controller is a PLC programmable controller model FXIN-14 MR-01.
9. The DC48V intelligent PLC distribution box of claim 1, wherein the AC contactor KM1 and the AC contactor KM2 both use model CJX 2-3210/32A.
10. The DC48V intelligent PLC distribution box of claim 1, wherein the first and second miniature circuit breakers each employ a miniature circuit breaker model NXB-63/D321P.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922163859.5U CN210867278U (en) | 2019-12-05 | 2019-12-05 | DC48V intelligent PLC distribution box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922163859.5U CN210867278U (en) | 2019-12-05 | 2019-12-05 | DC48V intelligent PLC distribution box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210867278U true CN210867278U (en) | 2020-06-26 |
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