CN216411374U

CN216411374U - Signal protection device resistant to high voltage breakdown

Info

Publication number: CN216411374U
Application number: CN202122453828.0U
Authority: CN
Inventors: 徐鹏; 罗志云; 游勇林
Original assignee: Shenzhen Zhuokong Intelligent Technology Co ltd
Current assignee: Shenzhen Zhuokong Intelligent Technology Co ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-04-29
Anticipated expiration: 2031-10-12

Abstract

The utility model discloses a high-voltage breakdown resistant signal protection device which comprises a DI signal, a DI module isolator and a DI acquisition module, wherein the DI signal is transmitted to the DI acquisition module through the DI module isolator, 16 channels are arranged in the DI module isolator, each channel is provided with a photoelectric isolation module, an indicator lamp of the corresponding channel is lightened after the signal of each channel is activated, 0V terminals of the DI module isolator are grounded, and a 24V + terminal of the DI module isolator is provided with a 10A/1000V unidirectional conduction diode for preventing the high voltage of the DI signal from entering a 24V power supply loop so as to protect related equipment. Compared with the prior art, the utility model has the advantages that: the DI acquisition module is prevented from being broken down by high voltage, the engineering cost is reduced, the field debugging is facilitated, and the debugging efficiency can be greatly improved due to the fact that the channel signal activation indicating function is added.

Description

Signal protection device resistant to high voltage breakdown

Technical Field

The utility model relates to the technical field of environment and equipment monitoring systems, in particular to a DI (digital input signal) acquisition module of an environment and equipment monitoring system (BAS) in the rail transit industry, and particularly relates to a high-voltage breakdown resistant signal protection device.

Background

The environment and equipment monitoring system (BAS) comprehensively and effectively carries out automatic monitoring and management on station equipment such as a heating, ventilating and air conditioning system, a water supply and drainage system, an illumination system, an elevator system, an escalator system and the like, ensures that the equipment is in the optimal running state of safety, reliability, high efficiency and energy conservation, thereby providing a comfortable riding environment, better coordinating the running of the station equipment under the disaster states such as fire or blockage and the like, fully playing the due role of various equipment and ensuring the safety of passengers and the normal running of the equipment.

The BAS system needs to collect a large number of digital input signals; because the PLC technology in China is developed later, most DI acquisition modules of the BAS system are imported abroad at present, and the price is relatively high; for such precision equipment, measures are taken to prevent the input signal from entering the high voltage and breaking down the DI acquisition module.

The current disadvantages are as follows:

the DI acquisition modules used in BAS systems currently on the market have almost no function of preventing high voltage breakdown. It is often encountered in projects that the DI and DO signal lines are connected inversely, causing the DI signal to cross into the 220V high voltage, which in turn causes the entire acquisition module to burn out.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the technical defects and provide a high-voltage breakdown resistant signal protection device, which prevents a DI acquisition module from being broken down by high voltage and reduces the engineering cost.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the utility model provides a signal protection device of resistant high voltage breakdown, includes DI signal, DI module isolator, DI collection module, the DI signal passes to DI collection module through DI module isolator, be equipped with 16 passageways in the DI module isolator, every passageway all is furnished with the optoelectronic isolation module, and after every passageway signal activation, the pilot lamp of corresponding passageway will light, the 0V terminal of DI module isolator all has ground connection, and the 24V + terminal of DI module isolator is furnished with 10A 1000V's one-way diode that switches on for prevent that the high voltage of DI signal from scurrying into 24V power supply circuit, and then protect relevant equipment.

Compared with the prior art, the utility model has the advantages that:

DI signal isolation function: the DI module isolator has 16 channels in total, and each channel is provided with an optoelectronic isolation module; even if the DI signal has high voltage to flee into, because the effect of optoelectronic isolation module, can guarantee DI acquisition module safety operation.

Power signal isolation function: the 0V terminals of the DI module isolator are all grounded, and the 24V + terminal of the DI module isolator is provided with a 10A/1000V unidirectional conduction diode; the high voltage of the DI signal can be prevented from entering the 24V power supply loop, and related equipment can be protected.

The DI signal indicates the function: the DI module isolator is 16 passageways in total, and after the signal activation of each passageway, the pilot lamp of corresponding passageway will light, convenient field debugging, owing to increased passageway signal activation instruction function, can improve debugging efficiency greatly.

Drawings

Fig. 1 is an electrical schematic diagram of a high voltage breakdown tolerant signal protection device of the present invention.

Fig. 2 is an internal circuit diagram of a signal protection device of the present invention, which is resistant to high voltage breakdown.

Detailed Description

The signal protection device of the present invention, which is resistant to high voltage breakdown, is further described in detail with reference to the accompanying drawings.

With reference to the accompanying drawings, a high voltage breakdown resistant signal protection device comprises a DI signal, a DI module isolator and a DI acquisition module, wherein the DI signal is transmitted to the DI acquisition module through the DI module isolator, 16 channels are arranged in the DI module isolator, each channel is provided with a photoelectric isolation module, after the signal of each channel is activated, an indicator lamp of the corresponding channel is lightened, 0V terminals of the DI module isolator are grounded, and a 24V + terminal of the DI module isolator is provided with a 10A/1000V one-way conduction diode for preventing the high voltage of the DI signal from entering a 24V power supply loop and further protecting related equipment.

An electrical schematic diagram of a high voltage breakdown resistant signal protection device (see fig. 1 for details, illustrated with IOO channel):

when the external signal of the I00 input channel is normal: i00 input signal is closed, the photoelectric isolation module converts the optical signal into the electric signal, the IOO channel indicator lamp is lightened, and the DI acquisition module receives the I00 high-level signal.

When the external signal of the I00 input channel is abnormal (containing 220V high voltage): the input end of the I00 is provided with high voltage, the photoelectric isolation module cannot work (unidirectional conductivity of the light emitting diode), so that a high voltage signal is prevented from being transmitted to the DI acquisition module.

When the 24V power supply terminal contains 220V high voltage: the 24V terminal carries a high voltage-due to the action of the 10/1000V diode (unidirectional conduction of the diode) -to avoid the high voltage signal from passing to other 24V powered devices.

When the 0V power supply terminal contains 220V high voltage: since the 0V terminal is already grounded-the voltage is constrained to 0V-thereby avoiding high voltage signals from passing to other 24V powered devices.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A signal protection device resistant to high voltage breakdown, characterized in that: comprises a DI signal, a DI module isolator and a DI acquisition module, wherein the DI signal is transmitted to the DI acquisition module through the DI module isolator,

16 channels are arranged in the DI module isolator, each channel is provided with a photoelectric isolation module, after the signal of each channel is activated, the indicator lamp of the corresponding channel is lightened,

0V terminals of the DI module isolator are grounded, and a 24V + terminal of the DI module isolator is provided with a 10A/1000V unidirectional conduction diode for preventing high voltage of DI signals from entering a 24V power supply loop, so that related equipment is protected.