Shielding
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The shielding terminals (SHLD) should only be used for cables types with shielding (for example, Belden 9829). If shielding is required (that is, sites with high electric field interference): connect the cable shield to the SHLD terminals on the controller and all networked expanders. If the shield needs to be connected to earth then a cable needs to be connected from the SHLD terminal on the controller to the chassis earth stud. Do NOT earth the SHLD terminal on any of the expanders. |
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NOTICE: For star and multi-drop wiring It is not recommended to use shielded cables due to disadvantageous electrical characteristics (higher capacitance) in star and multi-drop wiring configuration. However, if shielding is required (that is, sites with high electric field interference) a new wiring in proper spur or loop configuration with appropriate installation cable configuration has to be done. |