產品詳情資料
PLC及各單元布置與CPU單元相鄰的單元,是特殊單元和輸入單元等幹擾產生少的單元。外部電路的電磁接觸器及電器類,其線圈及接點即幹擾發生源,因此應與PLC分開配置。(大致在100mm以上)此外模塊是PLC係統的主要部件,需經常進行調試維護,應安裝在方便操作的位置。安裝模塊時自左向右排布,便於擴展。信號線較多,通常***80mm寬的線槽,機架上端與線槽的凈距在30mm左右,機架下端與線槽的凈距在80mm左右。PLC和變頻器線的接法原則為防止plc和變頻器之間的控制信號線受空間電磁場的幹擾,可在這些控制信號線的外層接線,以提高係統的抗幹擾能力。此種接線要注意,對的接地點只能選取一點。不管是在PLC一邊,還是在變頻器的一邊。一般選在信號接收端,即變頻器一邊。這樣,可提高係統的抗幹擾能力。如果線在兩端都接地,會使線上有電流流過,不但不能提高係統的抗幹擾的能力,反而會加重外界對PLC的幹擾。PLC櫃型的選擇適用於裝PLC的櫃型,通常***固定櫃,且門板為整門的櫃型,如KB櫃、九折櫃和十六折櫃等,不宜選GGD櫃、固定分割櫃、抽屜櫃。因為PLC櫃內元件基本上為整板安裝,如果採用了櫃門分割的櫃型,不便於安裝和調試。對於GGD櫃如果***時,需做一下非標設計,將儀表門、前門和下通風門合並成一個整門,且櫃體框架上取消前後橫梁,以便於安裝和維護
英文產品詳細信息
The PLC and its units are arranged adjacent to the CPU unit, which are units with less interference caused by special units and input units. The coils and contacts of electromagnetic contactors and electrical appliances in external circuits are the sources of interference, so they should be configured separately from the PLC. In addition, the module is the main component of the PLC system and requires frequent debugging and maintenance. It should be installed in a convenient location for operation. When installing modules, they are arranged from left to right for easy expansion. There are many signal lines, usually with a * * * 80mm wide slot. The clear distance between the upper end of the rack and the slot is about 30mm, and the clear distance between the lower end of the rack and the slot is about 80mm. The principle of connecting PLC and frequency converter cables is to prevent the control signal lines between PLC and frequency converter from being interfered by spatial electromagnetic fields. The outer layer of these control signal lines can be connected to improve the anti-interference ability of the system. Attention must be paid to this type of wiring, and only one point can be selected for the correct grounding point. Whether on the PLC side or on the frequency converter side. Generally, it is selected at the signal receiving end, which is on the side of the frequency converter. This can improve the system's anti-interference ability. If the line is grounded at both ends, there will be current flowing through the line, which not only cannot improve the system's anti-interference ability, but also exacerbates external interference with the PLC. The selection of PLC cabinet type is applicable to the cabinet type installed with PLC, usually fixed cabinet, and the door panel is a whole door cabinet type, such as KB cabinet, 9-fold cabinet, and 16-fold cabinet. It is not suitable to choose GGD cabinet, fixed partition cabinet, or drawer cabinet. Because the components inside the PLC cabinet are basically installed as a whole board, if a cabinet type with a split cabinet door is used, it is not convenient for installation and debugging. If it is necessary to * * * * for GGD cabinets, a non-standard design needs to be made by merging the instrument door, front door, and lower ventilation door into a single door, and removing the front and rear crossbeams from the cabinet frame for easy installation and maintenance
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