move.
1 The composition of the solid-state circuit uses a key switch, 1. To select the control mode, the microcomputer control is to meet the use of the 1600 board of the two simulation output and a digital output port to give the control signal, the ugly parallel print interface 3 The output ports are respectively input into solid state relays; 3,02 The shuttle block action time output is not less than 410. The manual control is given by the 3 button switches. The marriage is given the corresponding pulse 4 Electronic relay module 3 is triggered by the regulator Schmitt Pulser Dual-gate inverter basic flip-flop and bistable circuit. Used with the contacts of a solid relay 082 with double-polarized coil double contacts, with memory lock function. The 1.2 connection between them is small, and the switches in the relay 2 externally connected between the 2.3 module's 2.3-lead terminals guarantee reliable on and off even if there is a signal bounce.
2 working principle of its working principle 2, when the push button switch, the slave regulator gets 3.6 level, Schmitt trigger output regular signal, so that the pulse generator gives 10 pulses, double AND gate 1 input At high level. Because the contacts are normally open contacts, the 2 input of the AND gate is low; the 2 input of the 8 AND gate is high due to inversion. Thus, the flip-flop output 2 = makes the polarity. The set conductor 2 of the pilot relay is energized and polarized so that contact 1 is closed and remains in this state. When the push button switch is applied again, the voltage is applied; 7, the relay contact 1 of the relay has been closed, the terminal 3 is high, and the levels of the two input terminals of the two AND gates are respectively changed from the original state to the trigger output terminal. The tube turns on the relay reset coil and turns it on. As described above, in the two pairs of contacts of the solid state relay, the pair of feet and the module are used as their performance circuit, and the other pair can be used for the switch control circuit. The electronic module is suitable for 430 coil voltages, and the maximum output current is 1 so it can be used according to the line and moxibustion conditions. A homomorphic relay consists of a module driven by a control circuit that uses the 33010 and 10010 AC contactors manufactured by JEOL to control 12. The motor is operated with 1 pump. The voltage of the contactor is 380. Overload protection device and use. Because the control loop of the motor winding and the normally closed contact of the protection device are connected, the overcurrent protection circuit automatically shuts off the circuit and the 4 air pump motor stops. In addition, in the control circuit, a series of normally open contacts of the 12 contactors are serially connected; in addition to the serial delay relays, the 12 control lines are also connected in series with the normally open contacts of the contactor. This not only guarantees that when the mechanical pump 12 is closed, the Roots, and the valve 12 will be immediately closed; and only if the electric valve is to be opened, it may be possible to set it according to the work requirements after the start of the 788.
The 24-stream power supply used by the control system is the phase line of the power line as a line. After pressure swing pressure release, when the light encounters a sudden power outage, the DC power supply system with a compact structure lasts about 1 28, and the contactor action time is about 48 seconds. 21 is the use of this difference in the duration of the transient process of electrical installations. The tethered circuit meets the requirements of adding two intermediate relays 1 and 34. Workers, Ding 6 or 2 calendars and 27, can be in the moment of power failure. Using a short duration of 24 dc, an electrical pulse signal similar to a slam button switch is obtained at the corresponding module 3 lead terminal 3, so that the 3162 combination circuit changes the locked state to meet the requirements for restart and achieve a safe operation. 3 conclusions The control box that this design circuit makes, has been used in Italy, 1 scene two each 3 inside diameters 1.21 empty tube rake rough pump system operation. By simulating various fault conditions, its control and protection functions fully meet the requirements.
I1 meteorite. Digital electronic technology foundation. Electronic Technology Foundation 1. Beijing People's Education Press, 1982214218.
2 Li Guangqi. Power system transient analysis. Beijing Water Conservancy and Electric Power Press, 1985212243.
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