CN203027250U

CN203027250U - Pulse width modulation signal isolation conversion electric signal output module

Info

Publication number: CN203027250U
Application number: CN 201220724587
Authority: CN
Inventors: 刘向红; 韦求达; 蒋道兵; 于广沅
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-26
Filing date: 2012-12-26
Publication date: 2013-06-26
Anticipated expiration: 2022-12-26

Abstract

The utility model discloses a pulse width modulation signal isolation conversion electric signal output module which comprises a pulse waveform shaping circuit (1), a low pass filter circuit (4), a voltage and current converting circuit (5) and a power supply circuit (6) which are sequentially electrically connected, wherein the power supply circuit (6) is used for supplying power to all parts. The pulse width modulation signal isolation conversion electric signal output module is characterized in that a level off-centre circuit (3) and a photoelectronic isolation circuit (2) which are electrically connected are serially connected between the pulse waveform shaping circuit (1) and the low pass filter circuit (4), and the power supply circuit (6) is a multiplexed output isolation power supply circuit. The pulse width modulation signal isolation conversion electric signal output module has the advantages of higher control precision, strong antijamming capacity, safety, reliability, high intelligence and simplicity in installation.

Description

Pulse-width-modulating signal isolation switching electrical signals output module

[technical field]

The utility model technology relates to the industrial equipment control field, and this module can be converted to the pulse width modulating signal isolation voltage signal or current signal output.

[background technology]

Along with the development of science and technology, industry spot, power monitoring, Medical Devices, the fields such as experimental study require also more and more to the control of remote equipment.In view of the attention degree to its result, and to the control precision of Remote Device Control module, antijamming capability, security reliability, intelligent degree, mounting meanss etc. have higher requirement.

In common the field, actuator and actuating equipment are all accepted the current signal of 4-20mA, and generally as the single-chip microcomputer of host computer, PLC does not have the interface of 4-20mA analog signal output, and than being easier to programme the output pulse width modulation signal, so pulse-width-modulating signal isolation switching electrical signals output module can address the above problem very easily.

Due to the long Distance Transmission of signal, the voltage difference between the ground wire of host computer and actuating equipment may reach tens, and hundreds of is even gone up kilovolt, if not isolating direct conversion, just to have data inaccurate, the phenomenon such as beat may damage equipment when serious, so must take quarantine measures.

[summary of the invention]

For the shortcoming of prior art and the needs in market, the purpose of this utility model is to provide a kind of control precision school high, and antijamming capability is strong, and is safe and reliable, and intelligent degree is high and simple pulse-width-modulating signal isolation switching electrical signals output module is installed.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of pulse-width-modulating signal isolation switching electrical signals output module is provided, comprise the pulse waveform shaper circuit, low-pass filter circuit, the voltage current transformating circuit that are electrically connected to successively, and the power circuit of supplying with each power supply, it is characterized in that: also be serially connected with photoelectric isolating circuit between pulse waveform shaper circuit and level shift circuit, described power circuit is multichannel output isolated power supply circuit.

The utility model is realized input signal, output signal, power supply three partial circuit electrical isolation.

The utility model technology input circuit adopts inverter to the shaping of input pwm signal, utilize the light-coupled isolation transmission, then its high-low level is displaced to benchmark, then gets its DC voltage component by low pass filter, be converted to the required signal of telecommunication of user by change-over circuit at last.

The utility model technology power supply can adopt push-pull type self-activated switch power supply, and anti-reverse defencive function is arranged, and inside contains reference voltage source, has the short circuit defencive function.It is little that whole module has power consumption, the advantage that efficient is high.

The beneficial effects of the utility model are: the control precision school is high, and antijamming capability is strong, and is safe and reliable, and intelligent degree is high and install simple.

[description of drawings]

The utility model will be further described below in conjunction with accompanying drawing.

Fig. 1 is utility model module whole theory diagram

Fig. 2 is utility model module voltage/power pack electrical schematic diagram.

Fig. 3 is utility model modular power source electrical schematic diagram.

Fig. 4 is utility model module apparent size figure.

Fig. 5 is utility model module pin and pcb board dimensional drawing.

In figure: 1 is that pulse waveform shaper circuit, 2 is that photoelectric isolating circuit, 3 is that level shift circuit, 4 is that low-pass filter circuit, 5 is that voltage current transformating circuit, 6 is power circuit.

[embodiment]

Referring to accompanying drawing, a kind of pulse-width-modulating signal isolation of the utility model switching electrical signals output module, comprise the pulse waveform shaper circuit 1, low-pass filter circuit 4, the voltage current transformating circuit 5 that are electrically connected to successively, and the power circuit 6 of supplying with each power supply, it is characterized in that: be serially connected with level shift circuit 3 and the photoelectric isolating circuit 2 that is electrically connected between pulse waveform shaper circuit 1 and low-pass filter circuit 4, described power circuit 6 is multichannel output isolated power supply circuit.

In embodiment of the present utility model, pulse waveform shaper circuit 1 adopts inverter to the shaping of input pwm signal, through photoelectric isolating circuit 2 transmission, then level shift circuit 3 is displaced to benchmark to its high-low level, get its DC voltage component by low pass filter 4 again, be converted to the required signal of telecommunication of user by voltage current transformating circuit 5 at last.

In embodiment of the present utility model, power circuit 6 adopts push-pull type self-activated switch power supply, and anti-reverse defencive function is arranged, and inside contains reference voltage source, has the short circuit defencive function.It is little that whole module has power consumption, the advantage that efficient is high.

Claims

1. a pulse-width-modulating signal is isolated the switching electrical signals output module, comprise the pulse waveform shaper circuit (1), low-pass filter circuit (4), the voltage current transformating circuit (5) that are electrically connected to successively, and the power circuit (6) of supplying with each power supply, it is characterized in that: be serially connected with level shift circuit (3) and the photoelectric isolating circuit (2) that is electrically connected between pulse waveform shaper circuit (1) and low-pass filter circuit (4), described power circuit (6) is multichannel output isolated power supply circuit.

2. pulse-width-modulating signal isolation switching electrical signals output module according to claim 1, is characterized in that: power circuit (6) employing push-pull type self-activated switch power supply.