Digital display instrument of the three types

Digital display instrument is a kind of common measuring instruments, has a certain application in multiple industries. The types of digital display instrument is more, the main PLC digital display table, PC digital display table, three main types of control digital display table. Today project is mainly to introduce three main types of digital display instrument for everybody, hope you can help to you.

( A) The PLC digital display table

the PLC digital display table is can communicate with the PLC digital display table, provided by the PLC data and very stable, it is widely used in industrial production. Since 1968, when American GM ( General motors) After using the first PLC, the PLC digital display table facilities also gradually developed, and a series of PLC, the PLC digital display table technology is already very mature, the PLC and the table can be completed through two line of data exchange. PLC can be replaced by a single chip microcomputer, directly into the digital display table, so the size smaller, its utility is continuously expanding.

it is divided into: 1. With RS232 or RS485 communication requires special communication interface ( At present the main communication way, defect is too occupied interface)

2. Two line ( The latest way of communication, save interface and stable, save resources)

3. BCD code communication ( Now do not use the way of communication, the disadvantage is that too much) to transfer data

( 2) PC display table

digital display table links with a PC, PC through series of parallel communication to control digital display table shows, etc.

( 3) Control digital display table

the digital display table can not only display the data, to control the object of monitoring can also

more high quality thermocouple sensor from

key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure thermocouple sensor, digital temperature thermocouple sensor