CN203250166U - Isolating device and programming unit having same - Google Patents

Abstract

The utility model discloses an isolating device and a programming unit having the same. The isolating device comprises a USB interface, a first TTL voltage regulator, a USB-to-TTL signal converter, an RJ45 interface, a 24V input interface, a product power supply voltage regulator, a second TTL voltage regulator, an isolator and a reset switch. The USB interface is used for connecting the isolating device to a host computer. The first TTL voltage regulator is used for regulating a USB interface voltage, and outputting a stable TTL voltage. The USB-to-TTL signal converter converts a USB signal into a TTL level signal. The RJ45 interface is used for connecting the isolating device to the programming unit, communicating with a product to be programmed and supplying power for the product. The 24V input interface is used for inputting a 24V voltage into the programming unit. The product power supply voltage regulator is used for regulating the input 24V voltage into a product power supply voltage for output. The second TTL voltage regulator is used for regulating the product power supply voltage into a TTL voltage. A first power side and a second power side receive the voltage output of the first TTL voltage regulator and the second TTL voltage regulator respectively, and the isolator performs bidirectional isolation and conversion on signals input/output from/to the USB-to-TTL signal converter and the RJ45 interface. The reset switch is turned on and off under the control of a DTR signal in the isolated and converted TTL signals, and outputs the product power supply voltage as a power supply signal to the RJ45 interface.

Description

Isolation device and programmer with the same

technical field

The utility model relates to an isolation device connected between a host computer and a programmer and a programmer with the isolation device. Specifically, it relates to an isolation device connected between a host computer and a programmer used in programming products in the field of industrial control and a programmer with the isolation device. the

Background technique

Usually, in the field of industrial control, it is necessary to program the firmware of the products in the field of industrial control on site. In the prior art, the power supply and the programming control signal between the host computer and the programmer are not isolated. When programming the firmware of the product through the host computer and the programmer on site, due to the potential difference between the host computer and the programmer Inconsistency may result in damage to the programmer performing programming or the product being programmed. the

Therefore, there is a need for an isolation device between the host computer and the programmer and a programmer with the isolation device, so as to program the above-mentioned products more reliably and safely. the

Utility model content

The purpose of this utility model is to provide an isolation device between the upper computer and the programmer as required above and a programmer with the isolation device, so as to program products more reliably and safely. the

According to one aspect of the present utility model, there is provided an isolation device between a host computer and a programmer, including the following components: a USB interface for connecting the isolation device to the host computer; a first TTL voltage regulator: for the USB interface The TTL voltage is stabilized and adjusted, and the stable TTL voltage is output; the USB signal to TTL232 signal converter converts the USB data signal into a corresponding TTL level 232 signal including TXD, RXD and DTR signals; the RJ45 interface isolates The device is connected to the programmer to communicate with the programmed product and provide power for it; the 24V input interface is used to introduce the external 24VDC power into the programmer; the product power supply voltage regulator is used to input the 24VDC input through the 24V input interface Regulate the product supply voltage, and output the product supply voltage; the second TTL voltage regulator adjusts the product supply voltage output by the product supply voltage regulator to TTL voltage output; the isolator, the first power supply side of the isolator receives from the first The TTL voltage output of the TTL voltage regulator, the second power supply side of the isolator 30 receives the TTL voltage output from the second TTL voltage regulator, and converts the TXD and RXD from the USB signal to the TTL232 signal converter and the RJ45 interface input/output Two-way isolation conversion with DTR signal, and reset switch, the DTR signal in the TTL level 232 signal that is isolated and converted by the isolator is used to control the on and off of the reset switch, so that the product power supply voltage output of the product power supply voltage regulator can be used as a power signal Provided to the RJ45 interface. the

Wherein, the isolation device further includes the following components: a first indicator, used to indicate whether the USB interface has been connected; a second indicator, used to display whether the 24VDC input via the 24V input interface has been connected. the

Wherein, the first indicator and the second indicator are realized by light emitting diodes. the

Among them, the USB interface is realized by selecting a USB-A socket. the

Among them, the USB signal to TTL232 signal converter is realized by using FT232RL chip. the

Among them, the product power supply voltage regulator selects the chip LM317 to realize. the

Among them, the isolator is realized by optocoupler device. the

According to an aspect of the present invention, there is provided a programmer including the isolation device as described above. the

According to the isolating device between the host computer and the programmer and the programmer with the isolating device of the utility model, the product can be programmed more reliably and safely. the

Description of drawings

The present invention will be better understood through the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. It should be clearly understood that the described example embodiments are for illustration and example only, and the invention is not limited thereto. The spirit and scope of the present invention are defined by the specific contents of the appended claims. A brief description of the accompanying drawings is described below, in which:

Fig. 1 shows a block diagram of an isolation device between a host computer and a programmer according to the present invention. the

Fig. 2 shows a schematic view of the front and rear panels of the programmer with the isolation device of Fig. 1 according to the present invention. the

Detailed ways

Now introduce in detail according to the isolating device between the upper computer of the present utility model and the programmer and the programmer with the isolating device with reference to the accompanying drawings. the

Fig. 1 shows a block diagram of an isolation device between a host computer and a programmer according to the present invention. the

As shown in Figure 1, the isolating device according to the present invention comprises the following components:

USB interface 1: used to connect the isolation device to the host computer. In the utility model, the USB interface 1 is realized by selecting a USB-A socket, and other USB sockets can also be selected to realize the USB interface 1;

The first TTL voltage regulator 11: regulates the TTL voltage (such as 5V voltage) of the USB interface 1, and outputs the stable TTL voltage to the first power supply side of the isolator 30;

USB signal to TTL232 signal converter 2: Convert USB data signal to corresponding TTL level 232 signal including TXD, RXD and DTR signals, for example, FT232RL chip can be used to realize USB signal to TTL232 signal converter 2;

Isolator 30: perform two-way isolation and conversion from the USB signal to the TTL232 signal converter 2 and the TXD, RXD and DTR signals input/output from the RJ45 interface 4 to the isolator 30. You can choose an isolation chip or an optocoupler. In the utility model Adopt optocoupler device to realize isolator 30;

Reset switch 3: use the DTR signal in the TTL level 232 signal isolated by the isolator 30 to control the on-off of the reset switch 3, and then realize the reset signal (such as 7VDC) as the power signal (that is, the product supply voltage signal) to the RJ45 Output of interface 4. The reset here is realized by briefly turning on and off the power of the product, which can reduce the number of connecting lines from the programmer to the product. The isolation device of the utility model cleverly uses the DTR signal of the RS232 signal to provide The product provides a reset signal;

RJ45 interface 4: Connect the isolation device to the programmer to communicate with the programmed product and provide power to it;

24V input interface 5: used to introduce the external 24VDC power supply into the programmer;

Product supply voltage regulator 6: adjust the 24VDC input through the 24V input interface 5 to the product supply voltage (such as 7V DC), output the product supply voltage to the reset switch 3, and reset the programmed product through the reset switch 3. For the power supply of the programmed product, in this utility model, the product power supply voltage regulator selects the chip LM317 to realize, so as long as the input voltage of LM317 is greater than 10V, the product power supply voltage can be generated normally;

The second TTL voltage regulator 21 : adjusts the product supply voltage output by the product supply voltage regulator 6 to a TTL voltage level, and is used to provide power to the second power supply side of the isolator 30 . the

The isolation device according to the present utility model can also include the following components: a first indicator 10: used to indicate whether the USB interface 1 has been connected; a second indicator 20, used to display whether the 24VDC input via the 24V input interface 5 has been connected . The first indicator 10 and the second indicator 20 can be realized by light emitting diodes, for example. the

The isolating device according to the present invention shown in FIG. 1 can be implemented integrally with a programmer for practical application. Refer to FIG. 2 for a schematic diagram of a programmer with the isolation device in FIG. 1 according to the present invention. the

Fig. 2 shows a schematic view of the front and rear panels of the programmer with the isolation device of Fig. 1 according to the present invention. In the panel on the left side of Fig. 2, the RJ45 interface 4, the 24V input interface 5 and the second indicator 20 of the programmer according to the present invention are shown. In the panel on the right side of FIG. 2 , the USB interface 1 and the second indicator 10 of the programmer according to the present invention are shown. the

The isolation device between the host computer and the programmer according to the utility model and the programmer with the isolation device ensure that the programmer or the programmed product is damaged due to the inconsistency of the potential during on-site programming, and the reliability is improved. and security. the

While there have been shown and described contemplated exemplary embodiments of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof as technology advances without departing from the present invention. The true scope of utility models. the

Claims (8)

1. the spacer assembly between a host computer and the programmable device is characterized in that comprising:

USB interface is used for spacer assembly is connected to host computer;

The one TTL voltage regulator: the TTL voltage to USB interface carries out the voltage stabilizing adjusting, and with stable TTL Voltage-output;

Usb signal is converted to the usb data signal corresponding Transistor-Transistor Logic level 232 signals that comprise TXD, RXD and DTR signal to the TTL232 signal converter;

The RJ45 interface is connected to programmable device with spacer assembly, in order to communicate with the product that is programmed and provide power supply for it;

The 24V input interface is used for outside 24VDC power supply is introduced in the programmable device;

Product supply voltage regulator is adjusted to the product supply voltage to the 24VDC by the input of 24V input interface, and the product supply voltage is exported;

The 2nd TTL voltage regulator, the product supply voltage that product supply voltage regulator is exported is adjusted to the TTL Voltage-output;

Isolator, the first mains side of isolator receives the TTL Voltage-output from a TTL voltage regulator, the second source side joint of isolator 30 is received the TTL Voltage-output from the 2nd TTL voltage regulator, will be from usb signal to the TTL232 signal converter and TXD, the RXD of the I/O of RJ45 interface and DTR signal carry out two-way isolation conversion, and

Reset switch is controlled the break-make of reset switch by the DTR signal in Transistor-Transistor Logic level 232 signals of isolator isolation conversion, in order to the product supply voltage output of product supply voltage regulator is provided to the RJ45 interface as power supply signal.

2. spacer assembly as claimed in claim 1 characterized by further comprising following assembly:

Whether the first indicator is used to refer to USB interface and connects;

The second indicator is used for showing whether the 24VDC via the input of 24V input interface accesses.

3. spacer assembly as claimed in claim 2 is characterized in that:

The first indicator, the second indicator are realized by light emitting diode.

4. spacer assembly as claimed in claim 1 is characterized in that:

USB interface is by selecting the USB-A socket to realize.

5. spacer assembly as claimed in claim 1 is characterized in that:

Usb signal selects the FT232RL chip to realize to the TTL232 signal converter.

6. spacer assembly as claimed in claim 1 is characterized in that:

Product supply voltage regulator selects chip LM317 to realize.

7. spacer assembly as claimed in claim 1 is characterized in that:

Isolator adopts optocoupler to realize.

8. one kind comprises the programmable device such as one of claim 1-7 described spacer assembly.

Images