CN202583796U

CN202583796U - Hot-pluggable multichannel analogue output module

Info

Publication number: CN202583796U
Application number: CN 201220235257
Authority: CN
Inventors: 李玮; 吴晓闯; 王翠玲; 李文泉; 宋慧娟; 孟郁金; 王玉宏; 王耀华; 田涛
Original assignee: SHANXI LIANHUA WEIYE TECHNOLOGY CO LTD
Current assignee: Beijing rockontrol Information Technology Co.,Ltd.; Rockontrol Technology Group Co ltd
Priority date: 2012-05-24
Filing date: 2012-05-24
Publication date: 2012-12-05
Anticipated expiration: 2022-05-24

Abstract

The utility model discloses a hot-pluggable multichannel analogue output module, belonging to the technical field of multichannel analogue output devices. The technical problem to be solved is to provide a PLC (Programmable Logic Controller) analogue output module with a multichannel analogue output function and a hot plug protection function. The technical scheme is as follows: the hot-pluggable PLC digital output module comprises a hot plug power supply module, an MCU (Microprogrammed Control Unit), an analogue output unit, a communication unit and a man-machine interaction unit, wherein the power supply port of the MCU unit is connected with the power supply output end of the hot plug power supply module, the input end of the analogue output unit is connected with the signal output end of the MCU, the communication port of the MCU is connected with the communication unit, and the MCU is connected with the man-machine interaction unit. The hot-pluggable multichannel analogue output module is suitable for the industrial control field.

Description

A kind of hot swappable multichannel analog amount output module

Technical field

A kind of hot swappable multichannel analog of the utility model amount output module belongs to multichannel analog amount output unit technical field.

Background technology

Hot plug is meant a non-circuit board that powers on is embedded in the system of the operation that powers on that this process has potential danger, might cause permanent damages to system or embedded main board, causes loss of data or makes any transient state system chaotic.

In the application of backboard formula control device, on the backboard between each module function independent, the insertion of a module or extract the outage that can cause whole device or re-power causes the interruption of system control function, brings hidden danger to producing with safety; Use conventional analogue amount output module; The output signal generally has only 1 the tunnel, the 2 road or 4 the tunnel; With 4 road analog output modules is example; If any 16 analog quantity output points of engineering project needs, then need use 4 analog output modules, to the bigger cost of processing needs of more analog quantity in the above-mentioned engineering project.

The utility model content

The utility model overcomes the deficiency that prior art exists, and technical matters to be solved is: a kind of PLC analog output module that possesses multi-analog output and band hot plug defencive function is provided.

For addressing the above problem; The technical scheme that the utility model adopted is: a kind of hot swappable multichannel analog amount output module; Comprise: hot connecting and disconnecting source module, MCU unit, analog quantity output unit, communication unit and man-machine interaction unit; The power port of said MCU unit links to each other with the power output end of hot connecting and disconnecting source module; The input end of said analog quantity output unit links to each other with the signal output part of MCU unit, and the PORT COM of said MCU unit is connected with communication unit, and the MCU unit is connected with man-machine interaction unit;

Said hot connecting and disconnecting source module includes current-limiting protection module, overvoltage protective module, hot-swapping controller module, Filtering Processing module and power transfer module; The output terminal of current-limiting protection module links to each other with the input end of power transfer module after being connected in series overvoltage protective module, hot-swapping controller module and Filtering Processing module successively, and the output terminal of said power transfer module is the power output end of hot connecting and disconnecting source module;

Said analog quantity output unit comprises: D/A change-over circuit, switch switching circuit, voltage treatment circuit and current processing circuit; The input end of said D/A change-over circuit is the input end of analog quantity output unit; Link to each other with the input end of voltage treatment circuit with the current processing circuit respectively after the output terminal serial connection switch switching circuit of D/A change-over circuit, the output terminal of said voltage treatment circuit and current processing circuit is the output terminal of analog quantity output unit.

The power output end of said power transfer module comprises a plurality of output port of power source of different electric pressures.

Said communication unit comprises: isolated can bus, usb bus, isolation RS232 bus and isolation RS 485 bus.

The utility model compared with prior art has following beneficial effect:

One, the utility model has reached uninterrupted control under the electriferous state through in multichannel analog amount output module, adopting hot plug power supply control technology, has realized the hot plug defencive function of multichannel analog amount output module;

Two, the communication unit in the utility model adopts complete electrical isolation mode, has improved security and anti-interference that device uses;

Three, the analog quantity output unit uses two 8 passage 16bit high precision DAC8718 digital to analog converters in the utility model, can realize that 16 tunnel simulating signals export simultaneously, has reduced the cost that uses analog output module in the engineering project;

Four, the analog output module in the utility model adopts the multi-layer PCB design, and interference free performance is high, and has the function extended attribute, on the basis that does not change the hardware platform structure, can realize the Different control strategy.

Description of drawings

Below in conjunction with accompanying drawing the embodiment of the utility model is done further detailed explanation:

Fig. 1 is the electrical block diagram of the utility model;

Among the figure: 1 is that hot connecting and disconnecting source module, 2 is that MCU unit, 3 is that analog quantity output unit, 4 is that communication unit, 5 is that man-machine interaction unit, 6 is that current limliting protection module, 7 is that overvoltage protective module, 8 is that hot-swapping controller module, 9 is that Filtering Processing module, 10 is that power transfer module, 11 is that D/A change-over circuit, 12 is that switch switching circuit, 13 is that voltage treatment circuit, 14 is the current processing circuit.

Embodiment

As shown in Figure 1; A kind of hot swappable multichannel analog of the utility model amount output module; Comprise: hot connecting and disconnecting source module 1, MCU unit 2, analog quantity output unit 3, communication unit 4 and man-machine interaction unit 5; The power port of said MCU unit 2 links to each other with the power output end of hot connecting and disconnecting source module 1, and the input end of said analog quantity output unit 3 links to each other with the signal output part of MCU unit 2, and the PORT COM of said MCU unit 2 is connected with communication unit 4; Said communication unit 4 comprises: isolated can bus, usb bus, isolation RS232 bus and isolation RS 485 bus, and MCU unit 2 is connected with man-machine interaction unit 5;

Said hot connecting and disconnecting source module 1 includes current-limiting protection module 6, overvoltage protective module 7, hot-swapping controller module 8, Filtering Processing module 9 and power transfer module 10; The output terminal of current-limiting protection module 6 is connected in series overvoltage protective module 7, hot-swapping controller module 8 and Filtering Processing module 9 backs successively and links to each other with the input end of power transfer module 10; The input end of said current-limiting protection module 6 can be provided with socket; Said socket can directly link to each other with power supply; The output terminal of said power transfer module 10 is the power output end of hot connecting and disconnecting source module 1, and the power output end of power transfer module 10 comprises a plurality of output port of power source of different electric pressures.

Said analog quantity output unit 3 comprises: D/A change-over circuit 11, switch switching circuit 12, voltage treatment circuit 13 and current processing circuit 14; The input end of said D/A change-over circuit 11 is the input end of analog quantity output unit 3; Link to each other with the input end of voltage treatment circuit 13 with current processing circuit 14 respectively after the output terminal serial connection switch switching circuit 12 of D/A change-over circuit 11, the output terminal of said voltage treatment circuit 13 and current processing circuit 14 is the output terminal of analog quantity output unit 3.

In the practical implementation process; The utility model can be connected through the backboard power supply slot of above-mentioned socket with backboard formula control device; Get the 24V direct current from the backboard slot; Above-mentioned hot connecting and disconnecting source module 1 carries out current limliting and overvoltage protection through the 24V direct current of its inner current-limiting protection module 6 and 7 pairs of inputs of overvoltage protective module; The utility model was produced in hot plug process when moment, peak current was with big voltage, can prevent that spike from getting into circuit and causing and permanently destroy with transience, the controller in the above-mentioned hot-swapping controller module 8 has programmable limits electric current, overcurrent protection, latch and function such as operation automatically; 24V direct current after hot-swapping controller module 8 is handled is again after 9 filtering of Filtering Processing module; Send into power transfer module 10, power transfer module 10 is the direct supply of each circuit and the needed different electric pressures of module with the 24V voltage transitions, is whole device power supply.

Above-mentioned MCU unit 2 is cores of the utility model; MCU unit 2 is except carrying out computing, comparison, the analysis each acquired signal; Also will satisfy the controlled variable of control strategy and calculate, real-time acquired signal is with the optimization of realization control strategy and the real-time monitoring of running status; Accomplish with the upper strata machine between data communication, the state that record controls moves and the logout when breaking down.

Switch switching circuit 12 in the above-mentioned analog quantity output unit 3 is used for selecting output voltage or electric current; When the needs output voltage signal; Switch is selected the voltage treatment circuit, and when the needs output current signal, switch is selected the current processing circuit; Switch switching circuit 12 has realized that the output form of each passage is optional, but the type of flexible configuration output signal; Voltage treatment circuit 13 comprises filtering circuit and amplifying circuit; Current processing circuit 14 comprises filtering circuit and voltage-current converter circuit, and carrying load ability reaches 300 Ω.

Above-mentioned man-machine interaction unit 5 can have 24 LED displays through the firm and hard existing interactive function of recessed lighting fitting, can show the information such as operation, warning, state indication of collection, the MCU unit 2 of observation signal.

Above-mentioned MCU unit 2 can be realized accomplishing exchanges data with host computer through communication unit 4; Communication unit 4 comprises isolated can bus, usb bus, isolation RS232 bus and isolation RS 485 bus; Can select in above-mentioned four kinds of host-host protocols any one when MCU unit 2 carries out exchanges data with host computer, when circuit design, take into full account the characteristics of interference source; Special design has been carried out in isolation and filtering; These telecommunication circuits have all adopted isolation technology, can effectively isolate interference, and system EMC index can design according to industrial A grade standard fully.

It is the MCU chip of STM32F107VC that above-mentioned MCU unit 2 can adopt model; It is the hot-swapping controller of TPS2491 that hot-swapping controller module 8 in the above-mentioned hot connecting and disconnecting source module 1 can adopt model; It is the digital to analog converter of DAC8718 that digital to analog converter in the analog quantity output unit 3 can adopt model; The utility model can adopt the multi-layer PCB design, improves interference free performance.

Claims

1. hot swappable multichannel analog amount output module; It is characterized in that: comprising: hot connecting and disconnecting source module (1), MCU unit (2), analog quantity output unit (3), communication unit (4) and man-machine interaction unit (5); The power port of said MCU unit (2) links to each other with the power output end of hot connecting and disconnecting source module (1); The input end of said analog quantity output unit (3) links to each other with the signal output part of MCU unit (2); The PORT COM of said MCU unit (2) is connected with communication unit (4), and MCU unit (2) are connected with man-machine interaction unit (5);

Said hot connecting and disconnecting source module (1) includes current-limiting protection module (6), overvoltage protective module (7), hot-swapping controller module (8), Filtering Processing module (9) and power transfer module (10); The output terminal of current-limiting protection module (6) is connected in series overvoltage protective module (7), hot-swapping controller module (8) and Filtering Processing module (9) back successively and links to each other with the input end of power transfer module (10), and the output terminal of said power transfer module (10) is the power output end of hot connecting and disconnecting source module (1);

Said analog quantity output unit (3) comprising: D/A change-over circuit (11), switch switching circuit (12), voltage treatment circuit (13) and current processing circuit (14); The input end of said D/A change-over circuit (11) is the input end of analog quantity output unit (3); Link to each other with the input end of voltage treatment circuit (13) with current processing circuit (14) respectively after the output terminal serial connection switch switching circuit (12) of D/A change-over circuit (11), the output terminal of said voltage treatment circuit (13) and current processing circuit (14) is the output terminal of analog quantity output unit (3).

2. a kind of hot swappable multichannel analog amount output module according to claim 1, it is characterized in that: the power output end of said power transfer module (10) comprises a plurality of output port of power source of different electric pressures.

3. a kind of hot swappable multichannel analog amount output module according to claim 2, it is characterized in that: said communication unit (4) comprising: isolated can bus, usb bus, isolation RS232 bus and isolation RS 485 bus.