8200-185

8200-185

8200-185

數(shù)字量信號(hào)連接應(yīng)注意的問題

變頻器的輸入信號(hào)中包括對(duì)運(yùn)行/ 停止、正轉(zhuǎn)/ 反轉(zhuǎn)、點(diǎn)動(dòng)等運(yùn)行狀態(tài)進(jìn)行操作的數(shù)字量輸入信號(hào)（開關(guān)型指令信號(hào)），這些信號(hào)常來自PLC 的數(shù)字量輸出信號(hào)。PLC 通常利用其內(nèi)部的繼電器接點(diǎn)（繼電器輸出型P L C ）或具有開關(guān)特性的元器件（晶體管輸出型PLC）與變頻器相連，得到運(yùn)行狀態(tài)指令，如圖1 和圖2 所示。在進(jìn)行數(shù)字量信號(hào)的連接時(shí)應(yīng)注意：

（1）使用繼電器輸出型P L C 與變頻器相連時(shí)，應(yīng)注意接觸不良常帶來變頻器誤動(dòng)作，因此在實(shí)際接線中要注意連接可靠。

（2）使用晶體管輸出型P L C 與變頻器相連時(shí)，應(yīng)注意晶體管本身的電壓的高低、電流的大小等限制條件在其范圍內(nèi)，保證系統(tǒng)的可靠性。

（3）設(shè)計(jì)變頻器的輸入信號(hào)電路時(shí)，應(yīng)盡量避免采用繼電器等感性負(fù)載，因繼電器開閉產(chǎn)生的浪涌電流可能引起變頻器的誤動(dòng)作。

（4）當(dāng)P L C 輸出的開關(guān)信號(hào)進(jìn)入變頻器時(shí)，有時(shí)會(huì)發(fā)生外部電源和變頻器控制電源之間的串?dāng)_，應(yīng)注意對(duì)P L C和變頻器分開接地，避免兩者使用共同的接地線。

6SL3120-1TE24-5AC0    

6SL3120-1TE23-0AC0    

6SN1123-1AA01-0FA1   

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6GK7 343-1EX21-0XE0   1

6ES7 341-1CH01-0AE0   1

NES5411-CB30  1

20-750-ENETR, 5-10個(gè) 面價(jià)3674

2198-S086-ERS3, 10-15個(gè) 面價(jià)29568

2198-S086-ERS4，10-15個(gè) 面價(jià)34969

SR2A101BD   1

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6SL3210-1PIE18-0UL0 1 套 

6SL3210-1PE18-0UL0

7KM9300-0AM00-0AA0

ATV71HC13N4

伍德沃德PN：8200-185數(shù)量1--------

671-5AE01-0AX0數(shù)量1

TDID-201/107/435/21   10

6ES5728-8MA11   1 pcs

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6ES5728-8MA11 2

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7MH7177- 2BB10，  1

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6SL3210-1PE13-2UL1-PM240-2   2

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ACTUS POWER NPSA-102MU-E9BS  NPSA102MUE9BS

ACCURAY 086161-002  086161002

ACCU SORT AV3700  AV3700