CN202033655U

CN202033655U - Four-channel analogue value output device based on electric link bus

Info

Publication number: CN202033655U
Application number: CN2011201554181U
Authority: CN
Inventors: 吴亮
Original assignee: BEIJING HAOTIAN RONGZHI ELECTRICAL TECHNOLOGY Co Ltd
Current assignee: BEIJING HAOTIAN RONGZHI ELECTRICAL TECHNOLOGY Co Ltd
Priority date: 2011-05-16
Filing date: 2011-05-16
Publication date: 2011-11-09
Anticipated expiration: 2021-05-16

Abstract

The utility model relates to a four-channel analogue value output device based on an electric link bus. The device comprises a bus interface module, a master control chip (MC9S08AW32), a 10-digit D/A (Digital/Analogue) conversion circuit, a four-channel analogue value output circuit and a power supply conversion circuit, wherein the bus interface module is used for communicating with a system bus, receiving communication signals from the bus, sending the communication signals to the master control chip and sending response signals of the master control chip to a bus network; the master control chip is used for controlling the four-channel analogue value output circuit according to a command content; the 10-digit D/A conversion circuit is used for converting digital signals into analogue signals; the four-channel analogue value output circuit can choose one from three modes including 5V, 10V and 4-20mA; and the power supply conversion circuit is used for converting DC 24V power supply accessed from the external into bus power supply and data power supply needed by the system bus, and working power supply of chips. The analogue value output device provided by the utility model has more output signal modes, more channels, simple structure, simplicity and convenience in control, and convenience in maintenance.

Description

Four road analogue quantity output devices based on electric thing connection bus

Technical field

The utility model relates to a kind of four road analogue quantity output devices, especially a kind of four road analogue quantity output devices based on electric thing connection bus that are used for electric automatization control field.

Background technology

Electric thing connection bus (Electric Link Bus) is a kind of field bus technique.It integrates equipment such as the central air conditioning equipment in the building, electric switch equipment, lighting equipment, energy management, video monitoring, security protection, environmental monitoring, by unified network bus structure and control platform, realize Centralized Monitoring and management to these equipment.

At present, the output signal of existing analogue quantity output device generally all is the 4-20mA pattern in electric automatization control field, and output channel is fewer, can not satisfy actual demand.

Therefore, if electric thing connection bus can be applied to analogue quantity output device and bring into play its advantage, then can satisfy the demand of people to a great extent for this kind equipment output mode and output channel.

The utility model content

The purpose of this utility model is to provide a kind of four road analogue quantity output devices based on electric thing connection bus to realize multi-mode, the output of multichannel analog quantity, thereby solves this problem that series products output mode is single, passage is few in the prior art.

The technical solution of the utility model is achieved in that this four road analogue quantity output devices based on electric thing connection bus, mainly comprises bus interface module, main control chip (MC9S08AW32), 10 D/A change-over circuits and four road analogue quantity output circuits.

Wherein, bus interface module is connected with system bus network and main control chip communication; Main control chip is connected with 10 D/A change-over circuits and four road analogue quantity output circuit communications successively; Power-switching circuit is electrically connected with bus network, bus interface module and main control chip respectively.

Described bus interface module is responsible for and the system bus communication, receives from the communication signal of bus and gives main control chip (MC9S08AW32), and the response signal of main control chip (MC9S08AW32) is sent on the bus network.

Described main control chip (MC9S08AW32) receives the communication command from bus, according to command context four road analogue quantity output circuits is controlled.

Described 10 D/A change-over circuits are responsible for digital signal is converted to simulating signal.The main digital signal that main control chip is sent is converted to directly proportional voltage or current signal.

Described four road analogue quantity output circuits can independently be controlled output four road analog quantity voltages or current signal, and the signal setting can be selected 5V, 10V, three kinds of patterns of 4-20mA.

Described power-switching circuit, the direct current 24V power source conversion of being responsible for the outside is inserted is needed bus power source of system bus and data power supply, and the working power of each chip.

The beneficial effects of the utility model are: come the curtage signal of output loop is controlled by electric thing connection bus platform, and by 10 D/A ALT-CH alternate channels in the module, convert the curtage signal of corresponding ratio to, output mode signal is many, passage is many.In addition, by electric thing connection bus will control integrate not only simple in structure with the power supply supply and also control easy, maintenance is convenient.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a schematic block circuit diagram of the present utility model

Fig. 2 is bus interface module pin definitions figure of the present utility model

Fig. 3 is the application drawing that bus interface module of the present utility model is connected with main control chip

Among the figure

1 bus network

2 power-switching circuits

3 bus interface modules

4 main control chips

5 10 D/A change-over circuits

6 four road analogue quantity output circuits.

Embodiment

Below, describe preferred embodiment of the present utility model in detail with reference to accompanying drawing.Need to prove before this, employed term or word can not limited interpretation be common implication or the implication in the dictionary in this specification and claims book, and should be based in order to illustrate that in the best way principle that its practical novel inventor can suitably define the notion of term is interpreted as meeting the implication and the notion of the utility model technological thought.Thereupon, the structure of representing in embodiment that this instructions is put down in writing and the accompanying drawing is one of the utility model most preferred embodiment, can not represent technological thought of the present utility model fully, therefore should be understood that for the utility model, to have various equivalents and the variation that to replace.

As Fig. 1, shown in Figure 3, four road analogue quantity output devices based on electric thing connection bus of the present utility model mainly comprise

bus interface module

3,4,10 D/A change-over circuits 5 of main control chip and four road analogue quantity output circuits 6.

Wherein, bus interface module 3 is responsible for carrying out communication with bus network 1, and the communication signal biography that receives from bus network 1 sends to main control chip 4, and the response signal of main control chip 4 is sent on the bus network 1.

The microprocessor MC9S08AW32 that main control chip 4 adopts Freescale Semiconductor (FREESCALE) to produce, the communication command that it receives from bus network 1 by bus interface module 3, and bid value resolved convert the numerical value that 10 D/A change-over circuits 5 can be handled to, and control 10 D/A change-over circuits, 5 output correspondent voltage or current signal to four road analogue quantity output circuits 6.This output circuit can independently be controlled output four road analog quantity voltages or current signal, and the signal setting can be selected 5V, 10V, three kinds of patterns of 4-20mA.

Simultaneously, direct supply of the present utility model is provided by bus network 1, direct current 24V power supply through power-switching circuit 2 be converted to+supply with main control chip 4 behind the 5V power supply and bus interface module 3 uses.

By electric thing connection bus will control integrate not only simple in structure with the power supply supply and also control easy, maintenance is convenient.

As Fig. 2, shown in Figure 3, bus interface module 3 is being born the communication function of this device and bus network 1, and each pin definitions of this module is as follows:

1-TE: send Enable Pin, high level is effective;

2-TXD: data sending terminal;

3-RXD: data receiver;

4-GND: power supply ground;

5-BUSY: bus busy condition indication end, high level represent that bus is busy, and low level is represented the bus free time;

6-NC: do not have connection;

7-R/T-S: bus data reception/transmitting terminal, 0 ~ 24V level;

8-VCC: positive source, 5V.

Be described and illustrate with reference to embodiment although it should be noted that the utility model, and provided the concrete structure that joins four road analogue quantity output devices of bus based on electric thing.But and do not mean that the utility model is limited to the embodiment of these descriptions, those skilled in the art can therefrom derive many different variants, they all will be covered in the true spirit and scope of the utility model claim.

Claims

1. four road analogue quantity output devices based on electric thing connection bus comprise power-switching circuit (2), bus interface module (3), main control chip (4), 10 D/A change-over circuits (5) and four road analogue quantity output circuits (6), it is characterized in that:

Described bus interface module (3) is connected with system bus network (1) and main control chip (4) communication, the communication signal that will be received from bus network (1) sends to main control chip (4), and the response signal of main control chip (4) is sent on the bus network (1);

Described main control chip (4) is connected with 10 D/A change-over circuits (5) and four road analogue quantity output circuits (6) communication successively, according to the communication command that is received from bus four road analogue quantity output circuits (6) is controlled;

Described 10 D/A change-over circuits (5), the digital signal of being responsible for main control chip (4) is sent is converted to directly proportional voltage or current signal;

Described four road analogue quantity output circuits (6) have 5V, 10V, three kinds of output modes of 4-20mA;

Described power-switching circuit (2) is electrically connected with bus network (1), bus interface module (3) and main control chip (4) respectively, the direct current 24V power source conversion of being responsible for the outside is inserted is needed bus power source of system bus and data power supply, and the working power of each chip.

2. four road analogue quantity output devices based on electric thing connection bus according to claim 1 is characterized in that: the microprocessor MC9S08AW32 that described main control chip (4) adopts Freescale Semiconductor to produce.