ABB NBRA-656C斩波器
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ABB NBRA-656C斩波器模块镜头盖。位于模块顶部前部，它覆盖LED（发光二极管）OK状态灯。该指示灯指示模块的基本状态。正常操作时，OK LED应亮起。强烈建议模拟模块输入或输出信号连接采用绞合屏蔽仪表电缆的接线方法。屏蔽的正确接地也很重要。为了最大限度地抑制电气噪声，电缆屏蔽只能在电缆的一端接地。对于输入模块，将噪声最大的一端接地（通常位于现场设备端）。ABB NBRA-656C对于输出模块，在模块端接地。有关更多屏蔽接地信息，请参阅GFK-0898，Series 90-30 PLC I/O模块规范。模拟输入模块接线方法纠正电气噪声问题有时可能是一种反复尝试的例行程序。然而，一般来说，最好将电缆屏蔽层接地，使其尽可能靠近噪声源，通常在设备端。在排除噪声问题时，有时试验屏蔽接地点位置是有益的。ABB NBRA-656C
Module Lens Cap. Located on the top front of the module, it covers the LED (Light Emitting Diode) OK status light. This light indicates the basic status of the module. For normal operation, the OK LED should be on.Wiring Methods for Analog Modules Twisted, shielded instrumentation cable is strongly recommended for analog module input or output signal connections. 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, ABB NBRA-656Cground 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.ABB NBRA-656C
品牌：ABB
型号：ABB NBRA-656C
产品说明：斩波器
特点：模块/卡件，控制器，触摸屏，伺服驱动器
优势：供应进口原装正品，专业停产配件。
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