DS200GSIAG1CGD 工控控制卡件_廈門阿米控技術有限公司

產品標題: DS200GSIAG1CGD 工控控制卡件模塊/熱電偶輸入

型號： DS200GSIAG1CGD

品牌： GE

產品詳情資料：

DS200GSIAG1CGD端子模塊使用方法教程工控DCS係統自動化設備

在469處接地時，只有一根回流導線需要接地，因為它們內部硬接線在一起。通過這種方式接地，RTD讀數不會出現誤差。如果RTD回路引線連接在一起並在電機處接地，則只能將一條RTD回路引線引回469。有關接線示例，請參見下圖。在469上運行多條RTD回路導線會導致嚴重錯誤，因為已經為回路電流創建了兩條或多條並聯路徑。使用此接線方案會導致讀數錯誤，與前面描述的REDUCED RTD LEAD NUMBER（減少RTD引線編號）應用程序中的讀數相同。

產品英文詳情資料：

When grounding at the 469, only one Return lead need be grounded as they are hard-wired together internally. No error is introduced into the RTD reading by grounding in this manner. If the RTD Return leads are tied together and grounded at the motor, only one RTD Return lead can be run back to the 469. See the figure below for a wiring example. Running more than one RTD Return lead to the 469 causes significant errors as two or more parallel paths for the return current have been created. Use of this wiring scheme causes errors in readings equivalent to that in the REDUCED RTD LEAD NUMBER application described earlier.

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