PXC36-EF.A
PXC36-EF.A
PXC36-EF.A
4、 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P L C )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P L C 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P L C 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P L C 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。
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Enlarge
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12-23-------------
6GK1906-0EA00 1
6GK1906-0EB00 1
JAPMC-MC2310-E 10
JEPMC-OP2300 6
6ES7332-5RD00-0AB0 3个
IC754VSI06STD-AB 1
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SGD7S-7R6A00A 1个
6SL3362-0AF00-0AA1 2台
K2E225-AB92-09
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6ES7647-6BE05-0BX0 1
C98043-A1200-L 数量1
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1VCF349758S0909 1
MCM169S3100 4
MCS169S3016 10
MCS169S3025 1
MCS169S3050 1
RC3/MM9 1
RC4/MM9 1
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MICROLOGIC 5.0A
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KAB-100-1022 4根
KAB-100-1023 4件
KAB-100-1014 2件
KAB-100-2000A 3件
KAB-100-1026 5件
KAB-100-1010 2件
KAB-100-7006 6件
KAB-100-7007 4件
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140CRP93100 面价 11466.05
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1VCF349752S0909 50
1VCF349757S0909 50
A06B-0078-B103 电机(带编码器),一台
ABB 3HAC046642-001 1
ABB 3HAC14209-3 1
6FC5603-0AC12-1AA0 2
6SN1123-1AA00-0CA2 1
6FX2001-2EF00 ID.NR.521 285-10 1
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EVF9325-EVV004 1
ML7984A4009 HONEYWELL 1
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变频器ACS510-01-09A4-4+B0554KWAC380V 1
变频器ACS510-01-017A-47.5KWAC380V 1
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变频器(H1000)通讯卡 ETC740250-SZ104 1
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6ES7972-0AA01-0XA0
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MP30DP
6SE7035-1EJ84-1JC1 2只 这个型号可以报二手的
6SE7024-7TD84-1HF5 2只
6DD1600-0BA3
6DD1640-0AH0 各1
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140CPS11420 1 7634.44
140CRA93200 1 17199
140DAI74000 1 5232
140DA084210 1 无面价
140CRP93100 1 12521
6GK1562-2AA00 2
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ACS510-01-195A-4 2
ACS510-01-157A-4 2
ACS510-01-125A-4 2
ACS510-01-038A-4 2
ACS510-01-017A-4 4
ACS550-01-045A-4 3
ACS550-01-023A-4 1
ACS550-01-015A-4 1