描述

SG2K-1T

PLC本身的抗干擾能力一般都很強(qiáng)。通常，只能將PLC的電源與系統(tǒng)的動(dòng)力設(shè)備電源分開(kāi)配線，對(duì)于電源線來(lái)的干擾，一般都有足夠強(qiáng)的抑制能力。但是， 如果遇上特殊情況，電源干擾特別嚴(yán)重，可加接一個(gè)帶屏蔽層的隔離變壓器以減少設(shè)備與地之間的干擾，提高系統(tǒng)的可*性。如果一個(gè)系統(tǒng)中含有擴(kuò)展單元，則其電 源必須與基本單元共用一個(gè)開(kāi)關(guān)控制，也就是說(shuō)，它們的上電與斷電必須同時(shí)進(jìn)行。良好的接地是保證PLC安全可*運(yùn)行的重要條件。接地的目的通常有兩個(gè)，其一為了安全，其二是為了抑制干擾。完善的接地系統(tǒng)是PLC控制系統(tǒng)抗干擾的重要措施之一。接地在消除干擾上起很大的作用。這 里的接地是指決定系統(tǒng)電位的地，而不是信號(hào)系統(tǒng)歸路的接地。在PLC控制系統(tǒng)中有許多懸浮的金屬架，它們是懼空中干擾的空中線，需要有決定電位的地線。交 流地是PLC控制系統(tǒng)供電所必需的，它通過(guò)變壓器中心點(diǎn)構(gòu)成供電兩條回路之一。這條回路上的電流、各種諧波電流等是個(gè)嚴(yán)重的干擾源。因此交流地線、直流地 線、模擬地和數(shù)字地等必須分開(kāi)。數(shù)字地和模擬地的共點(diǎn)地最好置懸浮方式。地線各點(diǎn)之間的電位差盡可能小，盡量加粗地線，有條件可采用環(huán)形地線。系統(tǒng)地端子 (LG)是抗干擾的中性端子，通常不需要接地，可是，當(dāng)電磁干擾比較嚴(yán)重時(shí)，這個(gè)端子需與接大地的端子(GR)連接。

產(chǎn)品承諾：
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨，
保?證售后服務(wù)質(zhì)量，
優(yōu)勢(shì)價(jià)格，大量現(xiàn)貨。

主營(yíng)DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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