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6FC5303-0AP03-0AA0控制面板
6FC5303-0AP03-0AA0控制面板
6FC5303-0AP03-0AA0控制面板
变频器运行时对PLC干扰应注意的问题
变频器运行时会对周围电气设备(包括PLC)产生较强的电磁干扰,同时变频器主电路断路器等开关器件动作时也会影响PLC的正常工作。为防止变频器运行时对PLC干扰,变频器与PLC相连接时应该注意以下几点:
(1)对PLC本身应按规定的接线标准和接地条件进行接地,而且应注意避免和变频器使用共同的接地线,且在接地时使二者尽可能分开。
(2)当电源电压波动大,谐波成分多时,为抑制谐波干扰,应在PLC的电源模块及输入/ 输出模块的电源线上接入噪音滤波器或者隔离变压器。如果干扰仍严重,应考虑在变频器主回路中接入电抗器、变压器和噪音滤波器等措施。
(3)变频器和PLC安装在同一电控柜时,应尽可能使与变频器有关的电缆和与PLC有关的电缆分开安装,尤其是连接变频器的强电电缆与连接PLC的弱电电缆更要分开安装。
4 结束语
变频器和PLC间连接问题,涉及到数字量信号连接、模拟量信号连接以及避免干扰应注意的问题;在实际应用中,两者间的连接还涉及到用弱电信号控制强电的问题。因此,应引起重视,避免干扰造成变频器、PLC的误动作;避免连接不当造成PLC或变频器的损坏。
如果购买单位的在质保日期一年内发现有质量缺陷的,可以进行一个免费维修或更换。
1SAM160000R1009 EA 4
1ASM160000R1012 EA 6
ISAM160000R1010 EA 2
ISAM160000R1011 EA 4
100-D630 Series B 24 VDC 2
PROTECH203 1
TPC1061Td 1
NP5-SQ001 1
142942891 1
MD204L 1
MT506T 1
VME420-D-2 2
TPC-1071H-D3AE 1
1900 0710 52 1
1900 0710 62 1
1900 0711 51 1
1900071292 1
E84AVSCE7512SB0 1
TD400C V2.0 1
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01720025 3
01720045
ROCKWELL
型号:4003245109
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UFP11A-00
ESX10-TA-100
4WE6J62/EG24N9K4
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SUMITOMO
TC-FX
RNYM03-1210-5
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Schneider Electric ELAU MC-4/11/10/400 MLC520R40-1350 68002413 Leuze
Electronic 1
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