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6.3 Controller earthing
控制器接地
Proper earthing of the controller requires an earthed mounting plate or metal frame. Additional earthing measures are only required if the mounting surface or frame material cannot be earthed. In this case, a short earthing conductor must be connected to the lower left/right fastening screw of the CPU module. l
控制器的正确接地需要一个接地安装板或金属框架。只有当安装表面或框架材料无法接地时，才需要额外的接地措施。在这种情况下，必须连接到 CPU 模块的左下/右紧固螺丝的短接地导体。
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The controller is earthed through the DIN rail or both lower fastening screws. Use
yellow chromated steel DIN rails to ensure proper earthing
控制器通过 DIN 导轨或两个较低的紧固螺丝接地.使用铬酸盐黄色DIN钢轨，确保正确接地
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6.4 Cable routing
电缆路由
- Ensure proper cable routing during wiring
- 布线时确保正确的电缆路由。
- Sort the cables in different cable groups (power current cables, power supply cables, signal cables and data cables).
- 将线缆分为不同的线缆组(电源线、电源线、信号线、数据线)进行分类。
- Make sure to lay signal and data cables separately from power current cables, i.e. in separate conduits or cable bundles. The distance should be at least 20 cm
- 确保信号和数据电缆与电流电缆分开敷设，即分开敷设管道或电缆束。距离至少为20厘米
- Signal and data cables should be installed close to earthed surfaces
- 信号和数据电缆应安装在靠近地线的地方
6.5 Cable shields
电缆屏蔽
- Use only shielded data cables. The shield must be earthed on both sides. Make sure that no compensating currents pass through the cable shield. A current-carrying equipotential bonding line can be used for this purpose
- 仅使用屏蔽数据电缆。屏蔽层必须在两侧接地。确保没有补偿电流通过电缆屏蔽。可使用载流等电位粘接线来实现此目的
- If a cable shield is earthed on one side, it only provides protection against capacitive coupling and low-frequency interference (50/60 Hz ripple voltage).
- 如果电缆屏蔽在一侧接地，它只能提供电容耦合和低频干扰(50/60 Hz纹波电压)的保护。
- Only use braided-shield cables. Foil shields exhibit low mechanical stability as well as poor contact and HF properties
- 只使用编织屏蔽电缆。箔屏蔽表现出较低的机械稳定性以及较差的接触和HF性能。
- Only metallic or metal-coated connectors must be used for shielded data cables.
- 屏蔽数据电缆只能使用金属或金属涂层连接器。
- Use only shielded cables for analog signals. Earth the shield on one end only for the transmission of small signals
- 模拟信号只能使用屏蔽电缆。单端屏蔽接地只用于传输小信号。
- Earth the cable shield using a clamp directly at the entry into the switch cabinet. Guide the shield up to the module without any interruption。
- 使用夹子直接在进开关柜处做电缆屏蔽层接地。
- There must be a low-impedance connection between the PE bar and the shield bar.
- PE排和屏蔽排之间必须有低阻抗连接。
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