BENTLY 135489-03模塊卡件
BENTLY 135489-03模塊卡件中文資料：
BENTLY 135489-03模塊卡件屏蔽的正確接地也很重要。為了最大限度地抑制電氣噪聲，電纜屏蔽只能在電纜的一端接地。對于輸入模塊，將噪聲最大的一端接地（通常位于現(xiàn)場設備端）。對于輸出模塊，在模塊端接地。有關更多屏蔽接地信息，請參閱GFK-0898，Series 90-30 PLC I/O Module Specification。模擬輸入模塊接線方法糾正電氣噪聲問題有時是一種反復嘗試的例行程序。BENTLY 135489-03然而，一般來說，最好將電纜屏蔽層接地，使其盡可能靠近噪聲源，通常在設備端。在排除噪聲問題時，有時試驗屏蔽接地點位置是有益的。記住，電纜屏蔽只能在一端接地。此外，最好盡量縮短剝線電纜引線的長度，以盡量減少暴露在噪聲環(huán)境中的非屏蔽導體的長度。有關更多詳細信息，請參閱GFK-0898系列90-30 PLC I/O模塊規(guī)格手冊。BENTLY 135489-03
英文資料
Proper grounding of the shield is also important. For maximum electrical noise suppression, the cable shield should only be grounded at one end of the cable. For Input modules, ground the end that is in the noisiest environment (which often is at the field device end). For Output modules, ground at the module end. See GFK-0898, Series 90-30 PLC I/O Module Specifications, for more shield grounding information. Analog Input Module Wiring Methods Correcting electrical noise problems can sometimes be a trial-and-error routine. However, in general, it is generally best to ground the cable shield as close to the source of the noise as possible, which is usually at the device end. In troubleshooting noise problems, sometimes it is beneficial to experiment with the shield grounding point location. Remember, the cable shield should be grounded at one end only. Also, it is best to keep the length of stripped cable leads as short as possible to minimize the length of unshielded conductors that will be exposed to the noisy environment. See the Series 90-30 PLC I/O Module Specifications Manual, GFK-0898 for additional details.BENTLY 135489-03
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