1.7 將電磁干擾問題(EMC) 影響減為最小的措施
通常，好的安裝經驗可以確保控制器安全和無故障運行。然而，如果遇到問題，請參考以下的建議及相關措
施。
1.7.1 確保電柜中的所有設備接地良好
使用短和粗的接地線連接到公共接地點或接地母排上。特別重要的是，連接到變頻器的任何控制設備（比如
一臺 PLC）要與其共地，同樣也要使用短和粗的導線接地。最好采用扁平導體（例如金屬網），因其在高頻
時阻抗較低。電機電纜的地線應直接連接到相應變頻器的接地端子（PE）。
1.7.2 控制電纜最好使用屏蔽電纜
一般來說，控制電纜的屏蔽層應直接在變頻器的內部接地，另一側通過一個高頻小電容（例如3.3nF/3000V）
接地。當屏蔽層兩端的差模電壓不高和連接到同一地線上時，也可以將屏蔽層的兩端直接接地。信號線和它
的返回線絞合在一起，能減小感性耦合引起的干擾。絞合越靠近端子越好。模擬信號的傳輸線應使用雙屏蔽
的雙絞線。不同的模擬信號線應該獨立走線，有各自的屏蔽層，以減少線間的耦合。不要把不同的模擬信號
置于同一個公共返回線。低壓數字信號線最好使用雙屏蔽的雙絞線，也可以使用單屏蔽的雙絞線。
上海施承電氣自動化有限公司
聯系人：黃經理
手機：135-6425-5051 QQ：2271-387-194
電話：021-3166-2619 傳真：021-6781-7055
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6SN1118-0DJ21-0AA1
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6SN1118-0DJ23-0AA1
6SN1118-0DJ23-0AA2
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6SN1118-0DK21-0AA1
6SN1118-0DK21-0AA2
6SN1118-0DK23-0AA0
6SN1118-0DK23-0AA1
6SN1118-0DK23-0AA2
6SN1118-0DM11-0AA1
6SN1118-0DM13-0AA1
6SN1118-0DM21-0AA0
6SN1118-0DM23-0AA0
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6SN1118-0DM31-0AA1
6SN1118-0DM31-0AA2
6SN1118-0DM33-0AA0
6SN1118-0DM33-0AA1
6SN1118-0DM33-0AA2
6SN1118-0NH00-0AA2
6SN1118-0NH00-0BA2
6SN1118-0NH01-0AA0
6SN1118-0NH01-0AA1
6SN1118-0NH10-0AA0
6SN1118-0NH10-0AA2
6SN1118-0NH11-0AA0
6SN1118-0NH11-0AA1
6SN1118-0NJ00-0AA0
6SN1118-0NJ00-0AA1
6SN1118-0NJ00-0AA2
6SN1118-0NJ01-0AA0
6SN1118-0NJ01-0AA1
6SN1118-0NK00-0AA0
6SN1118-0NK00-0AA1
6SN1118-0NK00-0AA2
6SN1118-0NK01-0AA0
6SN1118-0NK01-0AA1
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6SN1118-1NH00-0AA1
6SN1118-1NH00-0AA2
6SN1118-1NH01-0AA0
6SN1118-1NH01-0AA1
6SN1118-1NJ00-0AA0
6SN1118-1NJ00-0AA1
6SN1118-1NJ00-0AA2
6SN1118-1NJ01-0AA0
6SN1118-1NJ01-0AA1
6SN1118-1NK00-0AA0
6SN1118-1NK00-0AA1
6SN1118-1NK00-0AA2
6SN1118-1NK01-0AA0
6SN1118-1NK01-0AA1
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6SN1121-0BA11-0AA1
6SN1121-0BA12-0AA0
6SN1121-0BA13-0AA0
6SN1121-0DA11-0AA0
6SN1121-0DA13-0AA0
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6SN1123-1AA00-0KA0
6SN1123-1AA00-0KA1
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6SN1123-1AA00-0LA1
6SN1123-1AA00-0LA2
6SN1123-1AA00-0LA3
6SN1123-1AA01-0FA0
6SN1123-1AA01-0FA1
6SN1123-1AA02-0FA0
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6SN1123-1AB00-0HA2
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6SN1124-1AA00-0AA2
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6SN1146-1BB00-0EA1
6SN1146-1BB00-0FA1
6SN1146-1BB01-0BA2
6SN1146-1BB02-0CA2
6SN1147-1BB00-0CA0
6SN1147-1BB00-0DA0
6SN1147-1BB00-0FA0
6SN1145-1AA00-0AA0
6SN1145-1AA00-0CA0
6SN1145-1AA01-0AA0
6SN1145-1AA01-0AA1
6SN1145-1AB00-0CA0
6SN1145-1BA00-0BA0
6SN1145-1BA00-0CA0
6SN1145-1BA00-0DA0
6SN1145-1BA01-0BA0
6SN1145-1BA01-0BA1
6SN1145-1BA01-0DA0
6SN1145-1BA01-0DA1
6SN1145-1BA02-0CA0
6SN1145-1BA02-0CA1
6SN1145-1BB00-0DA0
6SN1145-1BB00-0DA1
6SN1145-1BB00-0EA0
6SN1145-1BB00-0EA1
6SN1145-1BB00-0FA0
6SN1145-1BB00-0FA1
6SN1146-1AB00-0AA0
6SN1146-1AB00-0BA0
6SN1146-1AB00-0BA1
6SN1146-1AB00-0CA0
6SN1146-1AB01-0AA0
6SN1146-1BB00-0BA0
6SN1146-1BB00-0CA0
6SN1146-1BB00-0DA0
6SN1146-1BB00-0DA1
6SN1146-1BB00-0EA0
6SN1146-1BB00-0EA1
6SN1146-1BB00-0FA0
6SN1146-1BB00-0FA1
6SN1146-1BB01-0BA0
6SN1146-1BB01-0BA1
6SN1146-1BB02-0CA0
6SN1146-1BB02-0CA1
1.7.3 布線
電機電纜應獨立于其它電纜走線，其最小距離為500mm。同時應避免電機電纜與其它電纜長距離平行走線，
這樣才能減少控制器輸出電壓快速變化而產生的電磁干擾。如果控制電纜和電源電纜交叉，應盡可能使它們
按90度角交叉。同時必須用合適的夾子將電機電纜和控制電纜的屏蔽層固定到安裝板上。
1.8 散熱問題
• 電柜里的發熱源，如驅動模塊的四周要留有散熱空間。
• 電柜與外部的通風要保持良好，有條件的要安空調。
