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Comprehensive equipment for vertical electrician, analogue, digital, electric drag experiment and skill training assessment

Vertical electrician, analogue, digital, and electric tractor experiments and comprehensive skills training and assessment device for electrician, analogue, digital and electric tractor skills I. Overview:
This device is an organic combination of electrician, analog, digital, electric drag experiments and skill training assessment, so that resources can be shared in one room and multi-purpose, which reduces the experimental training guidance staff and infrastructure investment, and has significant economic benefits. Compared with the products, in the experimental bench technology, the depth and breadth of the experimental content have been greatly improved. Experimental projects include courses in electrical engineering, electrical engineering principles, analog electronic technology, digital electronic circuits, electric drag, electrical control, and relay control. It can complete AC and DC, oscillation, magnetic field circuits, operational amplifiers, rectifier circuits, and AC and DC amplifier circuits. , Digital logic circuit, electrical control and other circuit experiments. The experimental part adopts the advanced experimental methods of German vocational education: a nine-hole universal universal experimental board and a discrete transparent component box are used to flexibly combine experiments, the components can be reused, the experiments are convenient, and the brain and hands-on ability are strong.
Modular and digital skills training Reform traditional experimental training teaching mode. Through basic operation skills and the production and debugging of more than 30 types of utility model circuits, students can master the production and debugging of electronic products, and learn to read circuit schematics and PCB drawings. , Familiar with the selection and testing of common electronic components, master welding and circuit assembly process skills (equipped with more than 30 sets of specially-designed training circuit boards and corresponding components in the equipment), and can handle problems during installation and commissioning. The training circuit covers switching, audio, signal generation, counting, decoding, display, measurement, and control.
Skills training for electricians and electric tractors through the safe use of electricity, the use of common tools and meters, basic skills training for electricians, the installation and maintenance of motors and troubleshooting, the installation, commissioning and maintenance of basic control circuits for electric motors System training for project analysis and processing. Can reach the labor and social security occupational skill appraisal intermediate level or above. This series of equipment is scientific, validating, practicable, and interesting. It is an ideal product for new, rebuilt laboratories in colleges, technical secondary schools, vocational schools, and various training institutions. ( Teaching Equipment | Teaching Instruments )
电工、模电、数电电拖技能实训考核综合装置

Features: 1. It can complete the electrician, analog, digital, and electric drag experiments, as well as the electrician, analog, digital, and electric drag practical training and assessment, which greatly saves experimental rooms, management personnel, and significant economic benefits. . 2. The box of the experimental components is transparent and intuitive. The cover and box adopt a more scientific press card structure, which is convenient for maintenance and disassembly, and can be reused. The component box is arbitrarily plugged into an experimental circuit on a nine-hole universal experiment board, and the method is flexible, so that the students' knowledge can be flexibly used and quickly grasped. Some experiments of the electrical and electronic equipment are equipped with universal integrated sockets. The experiment can be expanded by increasing the integration. 3. The training part is completed on the mesh board, which is convenient and flexible to operate, and it is convenient to replace the device. It is close to the industrial site, and it is easy to expand the training function or launch a new training project. 4. Abundant experimental training items and complete equipment functions. 5. Equipped with voltage-type current-type leakage protector, and has a single-chip microcomputer automatic full-process monitoring device for overload or short circuit. Once it occurs, it can automatically cut off the power. After troubleshooting, the power supply can be started again. To ensure the safety of equipment and operators. 6. The reference standard is 12 student stations in a room and 1 teacher station. Users can increase or decrease according to the number of students. The teacher station can both demonstrate and control the working power of the student station. 3. Technical performance: 1. Working power: Three-phase four-wire (or three-phase five-wire) ~ 380V ± 5% 50Hz 2. Temperature: -10 ℃ ~ 40 ℃, relative humidity <85% (25 ℃) 3. Device Capacity: <1KVA 4. Weight: 200Kg 4. Functional composition 1. Power supply and parameters: 1.1 Input power: Three-phase four-wire power input is controlled by start and stop buttons, and the indicator lights when input. 1.2 Power output: There are embedded fuses, three-phase leakage switches, overload and short-circuit soft-cut protection devices, and three-level protection. Group A: single and three-phase adjustable AC power supply, providing 0-430V continuously adjustable AC power, and 0-250V single-phase adjustable power supply (equipped with a 1.5KVA three-phase auto-coupled voltage regulator, equipped with There are three AC voltmeters that indicate the regulated output voltage.) Group B: Low voltage AC voltage 3-24V is adjustable in seven steps. The maximum output current is 1.5A, which is indicated by the ammeter. Group C: Low voltage DC stabilized power supply, voltage 5V, current 0.5A, indicated by ammeter. Group D: dual constant current regulated power supply, both output voltages are 0-30V, built-in relay automatically shifts gears. The multi-turn potentiometer is continuously adjusted and easy to use. The maximum output current is 1.5A, with preset current limiting protection function. The output has 0.5 level digital ammeter and voltmeter indication. The voltage stability is <10-2, the load stability is <10-2, and the ripple voltage is <5mv. Group E: Single-phase AC mains output. Universal plug-in board for user equipment. 2. Safety protection: Equipped with voltage and current leakage protectors, and has a single-chip microcomputer to automatically monitor the overload or short circuit, and automatically cut off the main power supply. After troubleshooting, press the reset button to restart the power supply to ensure the safety of the operator and equipment. 3. Function signal generator 3.1 Waveform: sine wave, triangle wave, square wave, pulse wave, sawtooth wave, TTL square wave, rectangular wave. 3.2 Frequency range: from 0.1Hz to 2MHz, divided into seven frequency steps. 3.3 Sine wave distortion: 10-30Hz <3% 30Hz-100KHz≤1% 3.4 Square wave response: leading edge / back edge≤100nS (open circuit) 3.5 maximum output amplitude (open circuit): f <1MH amplitude ≤15VP-P; 1M < f≤2MHz Amplitude≤11Vp-p 3.6 DC bias (open circuit): ± 10V 3.7 Output impedance Z: ZO = 50Ω ± 5Ω 3.8 Duty ratio: The rising and falling edges of the pulse and sawtooth wave can be continuously changed, the range is 10% ~ 90%. 3.9 Voltage Controlled Oscillation (VCF): When the applied DC voltage changes from 0 to ± 5V, the corresponding frequency change is greater than l00: 1. 3.10 Output attenuation: 20dB 40dB 60dB 4. Frequency counter: 4.1 Frequency measurement range: lHz ~ l00MHz. 4.2 Gate time: 0.01S, 0.1S, 1S, 10S 4.3 Input impedance (AC coupling): The resistance component is about 500KΩ, and the parallel capacitance is about 100P. 5, single pulse: each time can output a pair of positive and negative pulses. 6. Audio power amplifier: The input audio voltage is not less than 10mV, the output power is not less than 1W, the volume is adjustable, there is a speaker inside, which is used to amplify the sound of the circuit and can also be used for signal tracking. 7. Seven-segment decoder: 6 groups of seven-segment decoders and the corresponding decoding display digital tube. 8. Intelligent power and power factor meter Designed by a 24-bit dedicated DSP, a 16-bit high-precision AD converter, and a high-speed MPU unit. The key-control and digital display window realize the control mode of man-machine dialogue function. The software adopts RTOS design ideas, and is equipped with PC monitoring software to strengthen analysis capabilities. The power measurement accuracy is 1.0, the power factor measurement range is 0.3-1.0, the voltage and current ranges are 450V and 5A, and the load can be automatically determined (inductive display "L", capacitive display "C", pure resistance is not displayed), and Store 15 sets of measurement data for reference at any time. 9. A true rms intelligent AC ammeter is composed of a single-chip microcomputer main control test circuit and a full digital display and full range AC ammeter. The key-control and digital display windows are used to implement the man-machine dialogue function control mode. It can measure the true effective value of AC signal (20-20KHz), the measurement range is 0 ~ 5A, the range is automatically judged and automatically switched, the accuracy is 0.5 level, and the four-digit digital display. At the same time, data can be stored, queried and modified (a total of 15 groups, saved after power failure). 10. An intelligent DC digital ammeter is designed with ECL's high-performance AD converter and a high-speed MPU unit. The key-control and digital display windows realize the man-machine dialogue function control mode. With automatic and manual range, measuring range: 0-2000mA. Manual range is: 20mA, 200mA, 2000mA. The measurement accuracy is 0.5 grade. With data storage and query functions. With over-range alarm, indication and other functions.
V. Composition and equipment of the whole room (take reference standard: 1 teacher's desk and 12 student's desks as examples) 1. There are 12 experimental training screens, and each student station is equipped with one, and the material is iron double-layer matt plastic spraying, the left is the mesh plate, and the right is the nine-hole universal experiment plate. The lower part is the power supply, signal and control unit. 2. Operating table: aluminum-wood structure, desktop is fire-resistant, waterproof, wear-resistant high-density board. There are 12 sheets in total, one table and two seats. The table top is equipped with a rubber sheet to protect the table top. The lower part of the table is a component storage cabinet for components. 3. One teacher's table: It consists of an experimental training demonstration screen, a table, and an integrated controller for student power supply, which can be used for experimental training to explain and control the working power of the student table to improve the safety factor. 4. Equipment (take reference standards: 1 teacher's table, 12 student's tables or 25 seats as examples):
Serial number name Quantity per unit Total number of rooms unit Note
1 Human resuscitation model 1 Each Teacher presentation
2 Fire extinguisher 1 only Teacher presentation
3 DC 1 station 100W, teacher disassembly demo
4 Pistol drill 1 13 Put
5 Test leads, wrenches, needle-nose pliers, wire pliers, wire strippers and other electrical tools 1 13 set
6 Electric soldering iron and iron frame 1 25 set
7 Analog Multimeter MF-50 1 13 only
8 Digital Multimeter 890B + 1 13 only
9 Single-phase watt-hour meter 1 13 only
10 Three-phase watt-hour meter 1 13 only
11 Current Transformer 3 3 * 13 only
12 Megohmmeter 1 13 only
13 Clamp ammeter 1 13 only
14 Tachometer 1 only Teacher's desk
15 Transformer winding machine 2 only Group training
16 Fuse box 3 3 * 13 only
17 Fuse 6 6 * 13 only
18 Pull switch, garden socket, flat lamp holder Each 2 2 * 13 only
19 20W fluorescent lamp 1 13 set
20 Commutation switch 1 13 only
twenty one Resistance, transformer components 1 13 set
twenty two Three-phase motor disassembly and assembly tool 3 set
twenty three Hacksaw frame 1 13 Put
twenty four Single-phase motor 1 13 station
25 Three-phase motor 180W 2 2 * 13 station
26 AC contactor 4 4 * 13 only
27 Limit switch 4 4 * 13 only
28 Combination Switch 1 13 only
29 3H iron case button 2 2 * 13 only
30 thermal relay 2 2 * 13 only
31 Time Relay 1 13 only
32 Three-phase double-throw brake knife 1 13 only
33 50W transformer 1 13 only
34 Single pole switch 1 13 only
35 Three-phase brake knife 1 13 only
36 Inverted switch 1 13 only
37 Semaphore 3 3 * 13 only
38 Copper-clad board (PCB) production 1 13 sheet
39 Universal welding circuit board (welding training) and components 1 13 set
40 Electronic skills training and assessment components (including special circuit boards and corresponding components) 30 30 * 13 set
41 Current socket 3 3 * 13 only
42 AC and DC electricity meter 8 8 * 13 only
43 Resistors, potentiometers, inductors, capacitors, transformers, strip magnets, diodes, triodes, field-effect transistors, integrated circuits, integrated sockets, thyristors, logic level switches and logic circuits required for electrical, analog, and digital experiments Flat indication sensor and other components 1 13 set The components have been installed in the transparent unit box, and the integrated base is universal, which can freely expand the digital circuit experiment.
44 Transformer winding table 1 Zhang
45 Cable trough 2 2 * 13 Meter Group training
46 Double door cabinet 2 Each
47 Student stool 25 Zhang
6. Experimental training project (1) Training part: A: Electrician and electric tractor
1. 1. Use of low-voltage electric pen 2. Operation method of fire extinguisher (teacher demonstration) 3. 3. Master of first aid for mouth-to-mouth respiration and chest heart compression. 4. Use and identification of common tools 5. Connection of common wires and restoration of insulation 6. Disassembly, assembly and welding skills training of electric iron 7. 8. Electrician's image training 8. Electrician wiring process 9. 10. Wiring of fluorescent lamp circuit 11. Single-phase watt-hour meter direct wiring circuit installation 11. Single-phase watt-hour meter installed through the wiring circuit of the current transformer 12. 13. Power distribution board installation 14. Indoor wiring 15. Interior lighting circuit installation Use and reading of multimeter transfer switch 16. Measurement of AC voltage 18. Measurement of DC voltage and DC current 19. Installation of ammeter and voltmeter Resistance measurement 20. 21. Use of megohmmeter and clamp ammeter ground resistance tester 22. Measurement of single-phase power and power factor 23. Installation and wiring of three-phase four-wire active watt-hour meter 24. Installation and wiring of three-phase four-wire active watt-hour meter via current transformer. 25. Disassembly and assembly of common switch relays Disassembly and assembly of AC contactor 26. 27. Structural observation and detection of common starters Production of small transformers 28. 29. Small transformer failure inspection and elimination 30. Disassembly, assembly and test of three-phase squirrel-cage motor 31. Inspection of three-phase squirrel-cage asynchronous motor operation 32. Periodic maintenance of three-phase squirrel-cage asynchronous motors 33. Failure analysis of three-phase squirrel-cage motor 33. Elimination of local faults in stator windings 35. Disassembly of single-phase capacitor motor windings Single-phase capacitor motor failure and elimination 36. 36. Installation and maintenance training of manual forward control circuit 39. Contactor jog forward control 39. Forward control with self-locking 40. Forward rotation control with overload protection 41. Forward and reverse control of contactor interlocking 42. Forward and reverse control circuit of button interlock. 43. Control circuit for composite interlocking of buttons and contactors 44. Press the contactor to control Y- △ step-down control. 45. Reverse switch control forward and reverse control circuit 45. 46. Automatic back and forth stroke control circuit 47. Time relay control resistance step-down control circuit 48. Half-wave rectified energy consumption braking control circuit 49. Full-wave rectification energy-consumption braking control circuit 49. 50. Interlocking control of X62-W milling machine spindle and feed motor Time relay control Y- △ step-down start control 51. 56. Simulation installation of C620-1 lathe control circuit. 56. Disassembly training of DC motor (teacher demonstration) Maintenance training of DC motor (teacher demonstration)
B: electronic training
1. Use of common instruments 2. 2. Identification and testing of common electronic components 3. Electric soldering iron disassembly and electronic soldering skills training 4. 5. Production of printed circuit boards Production of three-terminal integrated stabilized DC power supply 6. 6. Production of series DC stabilized power supply 7. Assembly and test of low-frequency signal voltage amplifier 8. 8. Production and test of amplifier circuit with negative feedback signal; 10. Welding and debugging of the bridge oscillator 11. Production and test of battery voltage monitoring circuit 11. Production of electronic hypnosis circuit 13. Training of making analog "know" electronic circuits 14. Production and training of practical sound-control and light-control electricity-saving lighting 14. 15. Production training of electronic mosquito repellent circuit Eye protection timer circuit 16. 16. Production and training of voice alarm horn Production and test of logic tester 18. 19. Production and test of positive and negative pulse signals 20. Making of quiz responder Production of water level alarm circuit 22. Production of mini flashing lights Light control music doorbell 23. 24. Production of practical analog natural wind controller Table lamp dimming circuit 25. 26. Practical CMOS touch key circuit Production of automatic charger 27. Assembly and debugging of semiconductor radio Hearing aid assembly and commissioning 29. 30. Assembly and debugging of sound and light control corridor lights 30. Assembly and debugging of fire-fighting robot
(II) Experimental part: A. Electrical experiment:
1. 1. Use of electrical measuring instruments Identification and detection of common components 3. Volt-ampere characteristics of linear and non-linear components. External characteristics of the power supply 5. Measurement of potential value and voltage value 6. 6. Expansion of ammeter and voltmeter 7. 8. Verification of Kirchhoff's law 8. Inspection of Lenz's Law 10. Verification of Superposition Principle and Reciprocity Theorem 10. 11. Verification of Thevenin's Theorem and Norton's Theorem 11. 12. Equivalent conversion of voltage source and current source 13. Research on the characteristics of controlled sources First-order circuit experiment 14. 15. Transition process of second-order circuit Investigate the characteristics of LC components in DC and AC circuits 16. Conditions under which the load obtains maximum power Measurement of AC circuit parameters 19. Characteristics of RLC components in sinusoidal AC circuits RL and RC series circuit experiment 20. RLC series resonance circuit 22. Connection of fluorescent lamp circuit and power factor improvement 22. 23. Three-phase load star and delta connection 24. Three-phase circuit and power measurement Research on RC frequency selection network 25. Research on two-port networks Single-phase transformer experiment 27. Experiment of mutual inductance circuit 28. Use and starting of three-phase asynchronous motor 29. 30. Basic circuit of three-phase motor relay contact control Y- △ start control experiment of three-phase motor 31. 32. Sequence control experiment of three-phase motor 33. Energy consumption braking control experiment of three-phase motor The simplest circuit Selection of potentials and reference points in the circuit 35. Series of resistors 36. 37. Parallel connection of resistors Resistive hybrid connection 38. Resistor voltage divider circuit 39. Ohm's Law 40. Application and balancing conditions of electric bridge 41. Node voltage method 42. Circuit voltage method 43. Branch current method 44. RCL parallel circuit 45. Series circuit 46. Transformer structure and working principle 47. Kirchhoff's first law 48. Kirchhoff's Second Law 49. 50. Fluorescent lamp circuit principle Extending the range of the voltmeter 51. Extend the range of the ammeter 52. The excessive process of RC circuit 53. RL transition process 54. Capacitor series circuit 55. Capacitor parallel circuit 56. Charge and discharge of capacitors 57. The role of capacitors in AC and DC Movement of strip magnets in coils 59. Capacitive hybrid connection 60. Pure resistance, inductance and capacitance circuit 61. Serial of magnetic coupling coils 62. 63. Inverse string of magnetic coupling coil Working principle of ohmmeter 64. 65. Two-way switch for two ground control 66. Observe the hysteresis loop with an oscilloscope Ohm's Law of Magnetic Circuits 67. The mutual inductance of the two coils and the terminal with the same name 68. Mutual inductance coupling Method of improving power factor 70. Measurement of single-phase circuit power 71. Recorder power circuit 72. Filter circuit 73. Relationship between resistance and temperature: The resistance value of the filament under different voltages was measured by voltammetry. 74. 75. Three-phase asynchronous motor brake knife control forward rotation experiment 75. Control circuit with overload protection 76. 77. Forward and reverse control circuit of button control. Contactor control star-delta step-down start control circuit
B. Analog and digital experiments: (1) Simulation of some experiments
1. Forward and reverse characteristics of the diode 2. 2. Input and output characteristics of the transistor Transistor common emitter single tube amplifier 4. Two-stage resistance-capacitance coupling amplifier circuit 5. 5. The effect of negative feedback on amplifier performance FET amplifier 7. Differential amplifier circuit 8. Operational amplifier index test 9. 10. Basic applications of integrated operational amplifiers (various analog operational circuits) Integrated Operational Amplifier Nonlinear Application (Various Waveform Generators) 11. Transformer coupled push-pull power amplifier 12.0TL power amplifier 13. Integrated power amplifier 14. 15. Single-phase bridge rectifier circuit 15. Series transistor DC stabilized power supply (design experiment) 17. Integrated DC stabilized power supply Single-junction transistor characteristics 18. Single-junction transistor trigger circuit 19. Simple test of thyristor Thyristor controllable rectifier circuit
Using the above 20 experimental components can also complete the following experimental items
l. Voltage negative feedback bias circuit 2. 2. Voltage-divided current negative feedback bias circuit 4. Use a diode to stabilize the operating point. Common base amplifier circuit 5. Common collector amplifier circuit 6. Common source basic amplifier circuit 7. 8. MOSFET common drain circuit 8. 8. MOSFET common gate circuit 9. 10. Single tube RC amplifier circuit Transformer coupling amplifier circuit 11. Class A power amplifier circuit 12. Series negative current feedback circuit 13. 14. Series negative voltage feedback circuit 15. Parallel voltage negative feedback circuit 16. Parallel current negative feedback circuit 16. Common base and common emitter amplifier circuit 17. 18. Bootstrap emitter output circuit 18. NPN-PNP direct coupling amplifier circuit 19. 20. Eliminate self-excited oscillation with negative feedback 21. Transistor Switching Transformer feedback oscillation circuit 22. 23. Capacitive three-point oscillation circuit 24. Inductive three-point oscillation circuit. 25. Basic form of differential amplifier circuit 26. Long tail differential amplifier circuit 26. Dual-power long-tail differential amplifier circuit Op amps used for AC scaling Inverting input protection measures 29. In-phase input protection measures 30. Protection of wrong polarity of power supply 31. RC high-pass circuit 32. 33. Use a transistor to protect the device. Differential input arithmetic circuit 34. Fast integration circuit 35. Analog first order differential equation circuit 36. 36. Analog second-order differential equation circuit. Basic logarithmic operation circuit 38. Practical differential circuit 39. Anti-Number Amplification Basic Circuit 40. Simple zero-crossing comparison circuit 41. 42. Use a diode as the upper limit detection amplitude selection circuit. Lower limit amplitude selection circuit 43. 44. Low-pass filter circuit of RC passive network In-phase input first-order low-pass filter circuit 45. Inverting input first-order low-pass filter circuit 46. Simple second-order RC filter circuit 47. 48. Typical second-order RC active low-pass filter circuit. 49. Typical second-order high-pass active filter circuit. 50. Basic band-pass filter circuit Typical band-pass filter circuit 51. Rectangular wave oscillation circuit 52. 53. Adjustable width rectangular wave generator 54. Sawtooth wave generator with adjustable amplitude and frequency Single-phase half-wave rectifier circuit 55. 56. Single-phase full-wave rectifier circuit Capacitive filter circuit 57. Capacitive filter with resistive load 58. RC filter circuit 59. Basic LC filter circuit 60. 61. Double voltage rectifier circuit. Triple voltage rectifier circuit 62. Basic voltage regulator circuit 63. 64. Basic regulating tube voltage regulator circuit 65. Voltage-stabilizing circuit with amplification link 66. Single-phase half-wave thyristor rectification Electronic voltage regulating circuit 67. Electronic hypnosis-interesting experiment one 68. Electronic doorbell circuit one interesting experiment two 69. Electronic alarm circuit one interesting experiment three
(2) Digital part experiment
l. Parameter test of TTL integrated logic gate
2. Parameter test of CM0S logic gate
3. Application of TTL integrated electrode open circuit gate and tri-state output gate
4. AND, NOT, OR, and NOT gate experiments
5. Half Adder Circuit Experiment
6. Full adder circuit experiment
7. RS trigger experiment
8. D trigger experiment
9. JK trigger experiment
10. T-Trigger Experiment
11. JK-type flip-flops are converted into D-type flip-flops
12. D-type flip-flops into JK flip-flops
13. Counter experiment
14. MSI shift register and its application
15. Decoder and transformation method
16. MSI data selector and logic design 17. Differential type monostable circuit 18. Ring multivibrator 19. 20. Use a gate circuit to form an encoder distributor and selector. 21. Design of combination circuit one by one code conversion Design of combination circuit 211 display circuit 22 23. Design of Synchronous Sequential Circuits 24. Design of computer sequential circuits 25. Integrated timer test and application CM0S integrated A / D, D / A conversion circuit experiment 26. Diode NOT gate or NOR gate circuit 27. Triode NAND gate, NAND gate, or NOR gate circuit 28. Asynchronous decimal subtraction counter 29. 30. Asynchronous decimal addition counter Comprehensive ability training experiment-electronic stopwatch
C: Electric drag experiment
1.Blade knife switch forward rotation control circuit 2, contactor jog forward rotation control circuit 3, forward rotation control circuit with self-locking 4, forward rotation control circuit with over-search protection 5, reverse switch control, forward and reverse control Line 6, forward and reverse control circuit for contactor interlocking 7, forward and reverse control circuit for button interlocking 8, button contactor composite interlock control circuit 9, automatic round trip control circuit 10, contactor control series resistance step-down Start line 11, time relay control series resistance step-down control line 12, manual Y / △ step-down start 13, contactor control Y / △ step-down start 14, time relay control Y / △ step-down start 15, QX3-13 type Y / △ automatic start control circuit 16, half-wave rectification energy consumption brake control circuit 17, full wave Rectification energy consumption brake control line 18, C620 lathe electrical control line 19, manual step-down start 20, single-phase operation reverse connection brake control line 21, electric hoist electrical control line 22, C6163 lathe electrical control line 23, control circuit connection Lock control circuit 24, main circuit interlock control circuit
Digital,
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