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140ACI04000---140ACI04000

140ACI04000---140ACI04000

1、工作環(huán)境
　　(1)溫度：PLC要求環(huán)境溫度在0～55℃，安裝時(shí)不能放在發(fā)熱量大的元件下面，四周通風(fēng)散熱的空間應(yīng)足夠大。
　　(2)濕度：為了保證PLC的絕緣性能，空氣的相對(duì)濕度應(yīng)小于85％(無凝露)。
　　(3)震動(dòng)：應(yīng)使PLC遠(yuǎn)離強(qiáng)烈的震動(dòng)源，防止振動(dòng)頻率為10～55Hz的頻繁或連續(xù)振動(dòng)。當(dāng)使用環(huán)境不可避免震動(dòng)時(shí)，必須采取減震措施，如采用減震膠。

：張亮（工程師）    專線：
24小時(shí)移動(dòng)專線：         【】

　　(4)空氣：避免有腐蝕和易燃的氣體，例如化學(xué)的酸堿等。對(duì)于空氣中有較多粉塵或腐蝕性氣體的環(huán)境，可將PLC安裝在封閉性較好的控制室或控制柜中。例如電廠的干排渣、干除灰等，在基建后期增加了封閉小屋。
　　(5)電源：PLC對(duì)于電源線帶來的干擾具有一定的抵制能力。在可靠性要求很高或電源干擾特別嚴(yán)重的環(huán)境中，可以安裝一臺(tái)帶屏蔽層的隔離變壓器，以減少設(shè)備與地之間的干擾。一般PLC都由直流24V輸出提供給輸入端，當(dāng)輸入端使用外接直流電源時(shí)，應(yīng)選用直流穩(wěn)壓電源。因?yàn)槠胀ǖ恼鳛V波電源，由于紋波的影響，容易使PLC接收到錯(cuò)誤信息。

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