產(chǎn)品內容介紹
2711-T10G20觸摸屏
電纜布線(xiàn)注意事項連接到FA-M3的信號電纜攜帶諧波成分。信號電纜的作用就像天線(xiàn)，將這些諧波成分作為噪聲發(fā)射到外部空間，同時(shí)從外部空間接收噪聲。因此，有必要使用屏蔽信號電纜。FA-M3的EMC一致性測試使用屏蔽電纜和FG夾具進(jìn)行。下面總結了電纜布線(xiàn)過(guò)程中應注意的事項。圖A3.38以圖形方式對此進(jìn)行了說(shuō)明在連接到此設備的信號電纜中，從面板外殼引出的電纜應進(jìn)行屏蔽。引出面板外殼（例如連接到集線(xiàn)器）的10BASE-T和100BASE-TX電纜段應屏蔽。設計系統時(shí)，應使面板外殼的開(kāi)口盡可能小，以盡量減少面板外殼內產(chǎn)生的噪音泄漏。建議電纜開(kāi)口的直徑應小于100 mm，通風(fēng)開(kāi)口的直徑應該小于125 mm。拆除屏蔽電纜上的部分屏蔽，露出電線(xiàn)，并用FG夾具將其接地至面板外殼的金屬板。當使用排流線(xiàn)以抽頭方式連接到金屬板時(shí)，它不能確保低阻抗抗諧波噪聲，也不能提供足夠的接地效應（噪聲屏蔽效應）。電源模塊（F3PU30-0S和F3PU36-0S）和YHLS從機（TAH系列）的電源電纜應配備鐵氧體磁芯，以防止干擾發(fā)射。
采取以下糾正措施
布線(xiàn)電纜時(shí)，如有必要。-使接線(xiàn)電纜盡可能短。這樣可以最大限度地減少電纜的噪音發(fā)射和電纜上的噪音接收在易受噪聲影響的信號電纜周?chē)惭b鐵氧體磁芯，以減少噪聲的影響。鐵氧體芯應安裝在面板外殼的電纜出口附近布線(xiàn)易受噪聲影響的電纜時(shí)，應將其與噪聲源電纜隔離。在布線(xiàn)電纜時(shí)，有幾種方法可以實(shí)現隔離按距離隔離（電纜布線(xiàn)距離動(dòng)力電纜至少20 cm，距離其他電纜組至少10 cm）在電纜之間放置接地金屬板。-將每個(gè)電纜組穿過(guò)接地金屬導管或屏蔽管在電纜上插入過(guò)濾器時(shí)，確保過(guò)濾器前后的接線(xiàn)距離足夠遠。否則，噪聲可能會(huì )轉移到其他電纜段，并降低濾波器的有效性。特別注意以下區域：-電源電纜中插入的噪聲濾波器-信號電纜周?chē)惭b的鐵氧體芯-信號電纜中插入降噪電路（浪涌保護器電路、避雷器電路等）YHLS從設備（TAH系列）24V DC電源的注意事項-為T(mén)AH系列使用專(zhuān)用24V DC供電。避免與其他設備共用電源電源應包含內部噪聲過(guò)濾器電源電纜上應安裝鐵氧體磁芯。
Considerations on Cable Routing
Signal cables that are connected to the FA-M3 carry harmonic components. The signal cable acts like an antenna and emits these harmonic components as noise to the external space and at the same time receives the noise from the external space. Therefore, it is necessary to use shielded signal cables. The EMC conformance test of the FA-M3 is conducted using shielded cables and FG clamps. The considerations that should be observed during cable routing are summarized below. Figure A3.38 illustrates this graphically. - Of the signal cables connected to this equipment, those that lead out of the panel enclosure should be shielded. 10BASE-T and 100BASE-TX cable sections that lead out of the panel enclosure (say, to connect to a HUB) should be shielded. Design the system so that the opening of the panel enclosure is as small as possible to minimize possible leakage of noise generated within the panel enclosure. It is recommended that the diameter of the opening for the cable should be less than 100 mm and that of the opening for ventilation should be less than 125 mm Remove part of the shield on a shielded cable to expose the wire and ground it to the metal plate of the panel enclosure with an FG clamp. When connected to the metal plate in a pig-tail way using a drain wire, it cannot ensure low impedance against harmonic noise and cannot provide sufficient grounding effect (noise shield effect).Power supply cables of power supply modules (F3PU30-0S and F3PU36-0S) and YHLS Slave Units (TAH Series) should be fitted with ferrite cores to prevent interference emission.
Adopt the following corrective actions
if necessary when routing the cables. - Make the wiring cable as short as possible. This minimizes noise emission from the cable and noise receipt on the cable. - Fit a ferrite core around signal cables susceptible to noise to reduce the effect of the noise. Ferrite core should be fitted near the cable outlet of the panel enclosure. - When routing cables that are susceptible to noise, isolate them from cables that are noise sources.There are several ways to achieve isolation when routing the cables. - Isolation by distance (Route cables at least 20 cm away from power-motive cables and at least 10 cm away from other cable groups). - Place a grounded metal plate between the cables. - Route each cable group through a grounded metal conduit or a shielded tube. - When inserting a filter on a cable, make sure that wiring before and after the filter is sufficiently far apart. Otherwise, noise may transfer to other cable sections and reduce the effectiveness of the filter. Pay special attention to the following areas: - Noise filter inserted in the power supply cable - Ferrite core fitted around signal cables - Noise reduction circuits (surge protector circuit, arrestor circuit, etc.) inserted into signal cables
Considerations for 24V DC Power Supply to YHLS Slave Units (TAH Series) - Use a dedicated 24V DC power supply for the TAH series. Avoid sharing power with other equipment. - The power supply should incorporate an internal noise filter. - A ferrite core should be fitted on the power cable.
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