放大器R901142355
放大器R901142355
放大器R901142355
模擬量信號(hào)連接應(yīng)注意的問(wèn)題變頻器中的模擬量輸入信號(hào),通常指0~10V/5V 的電壓信號(hào)或0/4~20 mA的電流信號(hào);這些模擬量輸入信號(hào)可通過(guò)接線(xiàn)端子由外部給定,當(dāng)變頻器與PLC連接時(shí),這些模擬量輸入信號(hào)也可來(lái)自PLC的模擬量輸出信號(hào),如圖3 所示。在進(jìn)行模擬量的連接時(shí)應(yīng)注意:
(1)阻抗匹配。根據(jù)變頻器的輸入阻抗選擇PLC的輸出模塊,實(shí)現(xiàn)兩者的阻抗匹配。
(2)電壓范圍。當(dāng)變頻器和PLC的電壓信號(hào)范圍不同時(shí)(如變頻器的輸入信號(hào)為0~10V,而PLC的輸出電壓信號(hào)范圍為0~5V 時(shí);或PLC的一側(cè)的輸出信號(hào)電壓范圍為0~10V而變頻器的輸入電壓信號(hào)范圍為0~5V時(shí)),需采用串聯(lián)電阻的方式進(jìn)行分壓,以保證兩者在正常電壓范圍內(nèi)
工作,避免電壓過(guò)限可能損壞器件。
(3)采用屏蔽電纜或絞合電纜。對(duì)于變頻器和PLC而言,弱電控制信號(hào)(電壓0~5V/10V、電流0/4~20mA等)易受到外界強(qiáng)信號(hào)的干擾,對(duì)控制信號(hào)采取適當(dāng)?shù)钠帘未胧?。常用的方式就是采用屏蔽電纜進(jìn)行屏蔽;對(duì)于長(zhǎng)距離的控制回路宜采用絞合電纜,絞合電纜的絞合間距盡可能小。
(4)主、控電纜分開(kāi)布線(xiàn)。實(shí)際連線(xiàn)時(shí),注意主、控電纜分開(kāi)布線(xiàn),且相隔的距離。以保證主電路側(cè)的干擾及噪音影響不到控制電路。
BENTLY NEVADA 330180-91-CN - 11
Bently Nevada 149986-01 - 1
800K003-2 1
3617302-1037 1
SGM7J-04AFC6E 1
3ZX1012-0RT04-1AA1 1
伍德沃德 電動(dòng)執(zhí)行器控制器TG-17E,要4000-6000 RPM 1臺(tái)
6ES7443-1EX30-0XE0 1
PP883 1
3BSE092979R1
UA D155 A0111 1---------------
140CPU67261 查不到
140CPU67260 查不到
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1SFA898107R7000
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YASKAWA ELECTRIC USA-MED-30MA2SE USAMED30MA2SE
YASKAWA ELECTRIC CIMR-P5U20550F CIMRP5U20550F
WESTINGHOUSE Y60M24T30N Y60M24T30N
WESTINGHOUSE PC-700A-10-103003 PC700A10103003
ULTRASONIC GENERATORS SGM3512PB-1 SGM3512PB1
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SYMAX 8030-CRM-565 8030CRM565
STROMBERG SAFUS75F400 SAFUS75F400
SQUARE D S174A S174A
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