DSMB151 PLC控制模块
操作面板接地
1。操作面板的安装夹不能在面板和设备机柜之间提供安全的接地连接。2.在操作面板的快速连接底座和面板底盘之间连接一根2.5 mm2的电线。3.在面板底盘和车门上最近的接地点之间连接6或4 mm2电线或接地编织物。4.在门和设备机柜之间连接一个牢固但短的接地编织物。5.将电缆拧到24 V DC馈线上。门操作面板铁氧体磁芯机柜电源24 V DC中的安装板第7节其他安装提示面板3BSE043449R501 45 6中的以太网连接。铁氧体铁芯可抑制对24 V馈电的干扰。围绕铁氧体磁芯的2匝提供了1匝的4倍抑制。围绕铁氧体磁芯的3匝提供了1匝的9倍抑制。面板1中的以太网连接。在一些以太网工业设备中，RJ45触点的屏蔽通过电容器连接到机箱。接地线应短，导线应具有大面积。一根细长的接地线在高频下具有很高的阻抗（电阻），不会将干扰引导到地面。同一面积的多线导体优于单线导体。同样面积的编织导线更好。最好是一个短而厚的接地编织物。工业以太网RJ45 RJ45、RJ45和RJ45操作员面板操作员面板操作面板屏蔽短且无屏蔽0.1 uF 250 V以实现更好的EMC保护其他安装提示46 3BSE043449R501 2.操作员面板的以太网屏蔽直接连接到机箱。检查另一个以太网单元的屏蔽是否直接接地或通过电容器接地。在许多情况下，在两端将屏蔽以太网电缆连接到机箱是不合适的。可能会出现嗡嗡声或接地回路。非屏蔽布线甚至可能导致更少的通信错误。一个好的解决方案可能是使用屏蔽以太网电缆，但只在一端连接屏蔽。3.一种选择是打破屏蔽。4.更优雅的方法是用一根非屏蔽以太网电缆扩展屏蔽以太网电缆。5.您可以通过外部0.1 uF/250 V塑料电容器将屏蔽接地。这将把高频瞬态连接到地上。
Operation panel grounding
1。 The installation clip of the operation panel cannot provide a safe grounding connection between the panel and the equipment cabinet. 2. Connect a 2.5 mm2 wire between the quick connection base of the operation panel and the panel chassis. 3. Connect 6 or 4 mm2 wires or grounding braids between the panel chassis and the nearest grounding point on the door. 4. Connect a firm but short grounding braid between the door and the equipment cabinet. 5. Screw the cable onto the 24 V DC feeder. Door operation panel Mounting plate in ferrite core cabinet power supply 24 V DC Section 7 Ethernet connection in other installation prompt panel 3BSE043449R501 45 6. Ferrite cores suppress interference with the 24 V feed. Two turns around the ferrite core provide four times the inhibition of one turn. Three turns around the ferrite core provide nine times the suppression of one turn. Ethernet connection in panel 1. In some Ethernet industrial equipment, the shielding of RJ45 contacts is connected to the chassis through capacitors. The grounding wire shall be short and the conductor shall have a large area. A long and thin grounding wire has a high impedance (resistance) at high frequencies and will not lead interference to the ground. Multi wire conductors of the same area are superior to single wire conductors. Braided wires of the same area are better. A short and thick grounding braid is preferred. Industrial Ethernet RJ45 RJ45, RJ45, and RJ45 operator panel Operator panel Operator panel shield is short and unshielded 0.1 uF 250 V to achieve better EMC protection Other installation tips 46 3BSE043449R501 2. The Ethernet shield of the operator panel is directly connected to the chassis. Check whether the shield of another Ethernet unit is grounded directly or through a capacitor. In many cases, it is not appropriate to connect shielded Ethernet cables to the chassis at both ends. A buzz or a ground loop may occur. Unshielded cabling may even result in fewer communication errors. A good solution might be to use a shielded Ethernet cable, but connect the shield only at one end. 3. One option is to break the shielding. 4. A more elegant method is to extend the shielded Ethernet cable with an unshielded Ethernet cable. 5. You can ground the shield through an external 0.1 uF/250 V plastic capacitor. This will connect the high frequency transient to ground.
