57360001-KE PLC系统模块
适用规范进行安装和连接
为了实现更好的EMC保护•最初，主要使用供应商提供的原始布线。•使用屏蔽电缆进行RS232通信。•RS422和RS485使用双绞线和屏蔽电缆。•使用总线类型的电缆；以太网、Profibus、CC-Link、CAN、Device Net等•根据相关总线标准的适用规范进行安装和连接。•以太网使用屏蔽电缆，最好使用箔+编织屏蔽。•D-sub盖应进行屏蔽，并且屏蔽应与电缆引入处的盖360°连接。第7节实现更好EMC保护的其他安装提示57360001-KE DSMB175 47•连接两端的屏蔽。距离越长，接地电位可能会不同。在这种情况下，屏蔽应仅在一端连接。一个好的替代方案是通过0.1 uF/250 V塑料电容器将屏蔽的另一端连接到地。然后，两端以HF方式接地，但仅以LF方式在一端接地，从而避免了50 Hz接地回路。•使用EMC电缆压盖或普通塑料电缆压盖，拆下外护套，并使用360°金属电缆夹将屏蔽连接到安装板。5352屏蔽电缆接地平面1接地平面2接地板另一建筑物中的接地板0.1 uF/250 V不相同电位5353金属机柜金属机柜端子或连接器端子或连接器EMC电缆密封套塑料电缆密封套屏蔽电缆钢制短距离环境温度部分7其他安装提示 57360001-KE DSMB175 •将一个电缆干线/电缆管道中的24V DC和通信电缆，另一个电缆管道中230/380V AC。如果电缆需要交叉，则仅以90°交叉。
避免将更强的24 V DC输出电缆与通信电缆结合。•扣在屏蔽电缆上的铁氧体磁芯可以消除轻微干扰。将大型铁氧体片卡在非屏蔽电缆上，并且导线绕线芯移动2-4倍，效率约为5-25倍。环境温度操作员面板的最高环境温度在规范中提供。环境温度是指设备机柜中冷却面板电子设备的温度。5354顶部50°内部中间45°内部底部40°内部操作面板30°C外部电源功率气流轴流风扇120x120 mm第7节其他安装提示环境温度57360001-KE DSMB175 49在大多数情况下，操作面板的环境温度明显高于设备机柜的环境温度。如果机柜很高，并且有许多发热装置，机柜顶部的温度将大大高于预期的理论温度升高。所有电子器件都对热敏感。随着温度升高8-10°C，电解电容器的寿命缩短一半。15-20°C的温度升高会导致四分之一的寿命等。Rittal有一个很好的程序来估计机柜内的预期平均温度，以及一个大型程序来控制设备机柜内的温度。搪瓷涂层钢制机柜的辐射热值为5.5 W/m2和°C。在机柜内安装风扇将使温度均匀，而移动空气比静止空气提供更好的冷却效果。合适的风扇是120 x 120 mm轴流风扇，可提供24 V DC、115 V AC和230 V AC。
Installation and connection according to applicable specifications
For better EMC protection • Initially, the original cabling provided by the supplier is mainly used. • Use shielded cable for RS232 communication. • RS422 and RS485 use twisted pair and shielded cable. • Use bus type cables; Ethernet, Profibus, CC Link, CAN, Device Net, etc. • Install and connect according to applicable specifications of relevant bus standards. • Ethernet uses shielded cable, preferably foil+braided shield. • The D-sub cover shall be shielded and the shield shall be connected 360 ° to the cover at the cable entry. Section 7 Other Installation Tips for Better EMC Protection 57360001-KE DSMB175 47 • Shielding at both ends of the connection. The longer the distance, the different ground potentials may occur. In this case, the shield should be connected at one end only. A good alternative is to connect the other end of the shield to ground through a 0.1 uF/250 V plastic capacitor. Then, both ends are grounded in HF mode, but only in LF mode at one end, thus avoiding a 50 Hz grounding loop. • Use EMC cable gland or ordinary plastic cable gland to remove the outer sheath, and use 360 ° metal cable clamp to connect the shield to the mounting plate. 5352 Shielded cable grounding plane 1 Grounding plane 2 Grounding plate 0.1 uF/250 V different potential in another building 5353 Metal cabinet Metal cabinet terminal or connector terminal or connector EMC cable gland Plastic cable gland Shielded cable Steel short distance ambient temperature part 7 Other installation tips 57360001-KE DSMB175 • Connect 24V DC and communication cable in a cable trunk/cable duct, 230/380V AC in the other raceway. If cables need to be crossed, only cross at 90 °.
Avoid combining stronger 24 V DC output cables with communication cables. • The ferrite core fastened on the shielded cable can eliminate slight interference. The large ferrite sheet is clamped on the unshielded cable, and the conductor moves 2-4 times around the core, and the efficiency is about 5-25 times. Ambient Temperature The maximum ambient temperature of the operator panel is provided in the specification. The ambient temperature refers to the temperature of the electronic equipment cooling the panel in the equipment cabinet. 5354 top 50 ° internal middle 45 ° internal bottom 40 ° internal operation panel 30 ° C external power supply air flow axial fan 120x120 mm Section 7 Other installation tips Ambient temperature 57360001-KE DSMB175 49 In most cases, the ambient temperature of the operation panel is significantly higher than the ambient temperature of the equipment cabinet. If the cabinet is very high and there are many heating devices, the temperature at the top of the cabinet will be much higher than the expected theoretical temperature rise. All electronic devices are sensitive to heat. As the temperature rises by 8-10 ° C, the life of the electrolytic capacitor is shortened by half. A temperature rise of 15-20 ° C will result in a quarter of the life, etc. Rittal has a good program to estimate the expected average temperature in the cabinet, and a large program to control the temperature in the equipment cabinet. The radiant heat value of enamel coated steel cabinet is 5.5 W/m2 and ° C. Installing a fan in the cabinet will equalize the temperature, and moving air provides better cooling than static air. Suitable fans are 120 x 120 mm axial fans, which can provide 24 V DC, 115 V AC and 230 V AC.
