>>>>>型號:Triconex 3625C1 數(shù)字輸出模塊 安全可靠性
【功能描述】
在PLC控制系統(tǒng)中，電源占有極重要的地位。電網(wǎng)干擾串入PLC控制系統(tǒng)主要通過PLC系統(tǒng)的供電電源（如電源、I/O電源等）、變送器供電電源和與PLC系統(tǒng)具有直接電氣連接的儀表供電電源等耦合進入的?，F(xiàn)在，對于PLC系統(tǒng)供電的電源，一般都采用隔離性能較好電源，而對于變送器供電的電源和PLC系統(tǒng)有直接電氣連接的儀表的供電電源，并沒受到足夠的重視，雖然采取了一定的隔離措施，但普遍還不夠，主要是使用的隔離變壓器分布參數(shù)大，抑制干擾能力差，經(jīng)電源耦合而串入共模干擾、差模干擾。所以，對于變送器和共用信號儀表供電應選擇分布電容小、抑制帶大（如采用多次隔離和屏蔽及漏感技術(shù)）的配電器，以減少PLC系統(tǒng)的干擾。
位保證電網(wǎng)饋點不中斷，可采用在線式不間斷供電電源（UPS）供電，提高供電的安全可靠性。并且UPS還具有較強的干擾隔離性能，是一種PLC控制系統(tǒng)的理想電源。
為了減少動力電纜輻射電磁干擾，尤其是變頻裝置饋電電纜。筆者在某工程中，采用了銅帶鎧裝屏蔽電力電纜，從而降低了動力線生產(chǎn)的電磁干擾，該工程投產(chǎn)后取得了滿意的效果。
不同類型的信號分別由不同電纜傳輸，信號電纜應按傳輸信號種類分層敖設，嚴禁用同一電纜的不同導線同時傳送動力電源和信號，避免信號線與動力電纜靠近平行敖設，以減少電磁干擾。
>>>>>型號:Triconex 3625C1 數(shù)字輸出模塊 安全可靠性
【英文介紹】
In the PLC control system, the power supply occupies a very important position. Power grid interference into the PLC control system mainly through the PLC system's power supply (such as power supply, I/O power supply, etc.), the transmitter power supply and the PLC system with a direct electrical connection of the instrument power supply into the coupling. Now, for the PLC system power supply, generally use good isolation performance power supply, and for the transmitter power supply and PLC system has a direct electrical connection of the instrument power supply, and has not received enough attention, although a certain isolation measures have been taken, but generally not enough, mainly the use of isolation transformer distribution parameters, inhibit interference ability is poor, Common mode interference and differential mode interference are introduced through power coupling. Therefore, for the transmitter and shared signal instrument power supply should choose a small distribution capacitance, large suppression band (such as the use of multiple isolation and shielding and leakage technology) distributor to reduce the interference of the PLC system.
To ensure that the power grid feed point is not interrupted, the online uninterruptible power supply (UPS) can be used to supply power to improve the safety and reliability of power supply. And UPS also has strong interference isolation performance, is an ideal power supply for PLC control system.
In order to reduce the power cable radiation electromagnetic interference, especially the frequency conversion device feed cable. In a project, the author used copper tape armouring shielded power cable to reduce the electromagnetic interference of power line production, and the project has achieved satisfactory results after being put into operation.
>>>>>型號:Triconex 3625C1 數(shù)字輸出模塊 安全可靠性
