DFR/31R-PPA12K68
日期：2018-8-18 2.3 来自系统内部的干扰
主要由系统内部元器件及电路间的相互电磁辐射产生，如逻辑电路相互辐射及其对模拟电路的影响，模拟地与逻辑地的相互影响及元器件间的相互不匹配使用等。这都属于制造厂对系统内部进行电磁兼容设计的内容，比较复杂，作为应用部门是无法改变，可不必过多考虑，但要选择具有较多应用实绩或经过考验的系统
3 工程实施中主要抗干扰措施
为了保证系统在工业电磁环境中免受或减少内外电磁干扰，必须从设计阶段开始便采取三个方面抑制措施：抑制干扰源；切断或衰减电磁干扰的传播途径；提高装置和系统的抗干扰能力。这三点就是抑制电磁干扰的基本原则。
控制系统的抗干扰是一个系统工程，要求制造单位设计生产出具有较强抗干扰能力的产品，且有赖于使用部门在工程设计、安装施工和运行维护中予以全面考虑，并结合具有情况进行综合设计，才能保证系统的电磁兼容性和运行可靠性。主要考虑来自系统外部的几种如果抑制措施。主要内容包括：对系统及外引线进行屏蔽以防空间辐射电磁干扰；对外引线进行加装隔离器，特别是原理动力电缆，分层布置，以防通过外引线引入传导电磁干扰；正确设计接地点和接地装置，完善接地系统。另外还必须利用软件手段，进一步提高系统的安全可靠性。
3.1 采用性能优良的电源，抑制电网引入的干扰
在控制系统中，电源占有极重要的地位。电网干扰串入控制系统主要通过PLC系统的供电电源（如CPU 电源、I/O 电源等）、变送器供电电源和与PLC系统具有直接电气连接的仪表供电电源等耦合进入的。现在，对于 PLC 系统供电的电源，一般都采用隔离性能较好电源，而对于变送器供电的电源和 PLC 系统有直接电气连接的仪表的供电电源，并没受到足够的重视，虽然采取了一定的隔离措施，但普遍还不够，主要是使用的隔离变压器分布参数大，抑制干扰能力差，经电源耦合而串入共模干扰、差模干扰。所以，对于变送器和共用信号仪表供电应选择分布电容小、抑制带（如：使用北京平和公司隔离配电器），可以减少 PLC 系统的干扰。此外，位保证电网馈点不中断，可采用在线式不间断供电电源（UPS）供电，提高供电的安全可靠性。并且UPS 还具有较强的干扰隔离性能，是一种PLC控制系统的理想电源。
3.2 电缆敷设
为了减少动力电缆辐射电磁干扰，尤其是变频装置馈电电缆。笔者在某工程中，采用了铜带铠装屏蔽电力电缆，从而降低了动力线生产的电磁干扰，该工程投产后取得了满意的效果。不同类型的信号及控制电缆分别由不同电缆传输，信号电缆应按传输信号种类与动力电缆分层敖设，严禁用同一电缆的不同导线同时传送动力电源和信号，避免信号线与动力电缆靠近平行敖设，以减少电磁干扰。另外对于信号电缆及控制电缆应采用屏蔽电缆
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SWITCH, PUSHBUTTON, 1.2A, 600V, SCREW NWK PN: XB4BW35G5
Schneider Electric Modicon AS-B243-110 A/D Convert 10VDC Module
PHOTO ELECTRIC SENSOR 40M NPN/PNP - XUX0AKSAT16 (Fnl)
SCHNEIDER ELECTRIC LC2D12T7 Contactor
Schneider Electric Magelis GTO Touch Panel 3.5" - REPAIR SERVICE
Telemecanique ABL8RPM24200 24vDC Schneider Electric AC to DC Converter Drive
SCHNEIDER ELECTRIC MGP0164X TM16D NSX100F 16A FOUR POLE MCCB
Schneider Electric MGP1604X MCCB 160Amp 4-Pole Circuit Breaker NSX160F TM160D
PRESSURE SWITCH SPDT 10BAR - XMLA010A2S11 (Fnl)
SCHNEIDER 160 AMP MCCB 3 POLE 3 PHASE MGP1603X NSX TO CLEAR
MCB DISTRIBUTION BOARD 24 WAY TP/N COMES WITH 125 AMP INCOMER 3 PHASE
1 NEW at MostElectric: TM2AMI2HT SCHNEIDER MODICON SQUARE D
MECHANICAL LUG NWK PN: AL250JD
ACTUATOR, XB5 NON-ILLUMINATED PUSHBUTTON SWITCH NWK PN: ZB5AS864
NEW SCHNEIDER ELECTRIC IT USA Ups Replacement Battery Rbc34
SCHNEIDER MCB BOARD SQUARE-D 6 WAY TRIPLE POLE + NEUTRAL BOARD W/ 125A MS+2 MCBS
SCHNEIDER ELECTRIC Variable Frequency Drive,1 HP,230VAC, ATV12H075M3
Polypact Fixed/dir3p + Link 04403 Schneider Electric
PHOTO-ELECTRIC SENSOR 1M - XUK8AKSNM12 (Fnl)
SCHNEIDER ELECTRIC TELEMECANIQUE TSXRKY8EX EXTENSION RACK 8SLOT (1-YR WARRANTY)
SCHNEIDER MERLIN GERIN 30441 TM125D 4P/3R NS125 [LV430441]
SCHNEIDER ELECTRIC XVC4M25S Tower Light,40mm,Red/Orange,Support Tube
TELEMECANIQUE SCHNEIDER ELECTRIC XPS-AR SAFETY RELAY XPSAR311144P
APC by Schneider Electric - SYPD11 - Symmetra RM & LX Backplate Kit
AEG Modicon Schneider Electric PLC CPU a120 alu201l pc-alu-201l BNIB
Schneider Electric atv31c075m2zh28/Altivar 31 Inverter
Schneider Electric E/A modules Relay, tsxdmz28dr
Schneider Electric 4 Analogue Multi Swing modules, tsxaey414
Schneider Electric cpu340-10 Modbus GMX, bmxp341000
Schneider electric/telemecanique lc1d80004 Cont 80a 4p 120v 50/60hz
SCHNEIDER ELECTRIC Rotating Mirror,Red,120VAC, XVR13G04L, Red
SCHNEIDER ELECTRIC Variable Frequency Drive,3/4 HP,230VAC, ATV12H055M2
Schneider Electric-Barber Colman 3/4" Sweat Union Mixing 7.5Cv OEM VB-7314-0-4-6
CIRCUIT BREAKER, THERMAL MAGNETIC, 1P, 30A NWK PN: 60115
Schneider Electric PLC 140DAI34000 NEW
SCHNEIDER ELECTRIC MODICON BMXXBP1200 BMX-XBP-1200
Schneider Electric VS-7313-814-4-2 Valve Assembly 3-Way 1/2" Actuator MS51-7103
Schneider Electric VS-7313-814-4-8 Valve Assembly 3-Way 1" Smart X Actuator MS51
Schneider Electric 3KW 380-500 VAC Drive ATV28HU54N4 *Cracked Case*
1 NEW at MostElectric: XBTN401 MAGELIS SCHNEIDER SQUARE D
1 pcs Module: safety relay; Mounting: DIN; Safety cat:4; -10÷55°C; IP20
SELECTOR SWITCH, SPST-NO, 2POS, 90DEG NWK PN: XB4BG61.
CIRCUIT BREAKER, 1 POLE, 2A, DIN RAIL NWK PN: 60120
CIRCUIT BREAKER, THERMAL MAGNETIC, 1P, 2A NWK PN: 60103
SWITCH, KEY OPERATED, 1NO, 1.2A, 600V NWK PN: XB4BG41.
CIRCUIT BREAKER, THERMAL MAGNETIC, 1P, 5A NWK PN: 60106
SCHNEIDER ELECTRIC IT USA - AP7540
APC by Schneider Electric AP7540 Basic Rack PDU
Schneider Electric XMLA 500d2s12 switch 30 – 500bar, electromechanical 50...
APC by Schneider Electric J25B Line Conditioner - AC Surge, Spike, AC Noise prot
ULTRASONIC SENSOR 1M 15-24VDC - XX9V3A1C2M12 (Fnl)
SW SINGLE FOOT 3A 240V SCREW - XPEM111 (Fnl)
Merlin gerin LC2D32M7 Schneider Electric Spa - MOTOR REVERSER 32A 220VA
SCHNEIDER ELECTRIC LC1D115G7 IEC Magnetic Contactors , 120 VAC , Non-Reversing
APC BY SCHNEIDER ELECTRIC AP7540 Basic Rack PDU
Safety Monitoring Relay, Schneider Electric, XPSDMB1132P
IEC Magnetic Contactors, Schneider Electric, LC1D65ABD
SCHNEIDER SR3MBU01BD Modbus slave communication module SR3 24 VDC SMART RELAY
SCHNEIDER XACA08H7 **REP**
RELAY SAFETY 3PST-NO 24VDC 1.5A - XPSAC5121 (Fnl)
G Series Full Port 33m 08224 Schneider Electric
APC BY SCHNEIDER ELECTRIC AP7530 Rack PDU Zero U 20A 120V
Schneider Electric Pressure Switch Square D adw7m12
DRIVE, V/S, ATV12, 240V, 0.55KW, 1PH MPN: ATV12H055M2 SCHNEIDER ELECTRIC
Schneider Electric-Barber Colman Humidstat W/Outdoor Reset OEM VH7200A1000
CARTRIDGE, M221 CONTROLLER NWK PN: TMC2AI2
CARTRIDGE, M221 CONTROLLER NWK PN: TMC2AQ2V
Schneider Electric-Barber Colman Spdt Enthalpy Ctrl, 24V OEM THC-2
SCHNEIDER ELECTRIC Rotating Mirror,Red,12VAC/DC, XVR12J04S, Red
Square D Home Electronics Protective Device HEPD80 by Schneider Surge Protector
SCHNEIDER ELECTRIC REG48PUN2LJLU Temp Ctrl,1SSR, 1Current,24 VAC/VDC
1 pcs Module: safety relay; Mounting: DIN; Safety cat:4; -10÷55°C; IP20
SCHNEIDER ELECTRIC Warning Light,Rotating Mirror LED,Red, XVR10J04, Red
Schneider Electric frequency converters, 1.5kw, atv312hu15m2
Programming device with Schneider Electric Modicon kpe-441 IEEE 802.3 Controller
Schneider Electric a9 n18513 c120h Switch Miniature, curve D, 4p, 81 MM in
CIRCUIT BREAKER THERMAL MAGNETIC 1POLE - A9D31610 (Fnl)
Schneider Electric lc1d65au7 Contactor 65 to 240 V, 3p Elk Cont 65 to 240 v50/...
Schneider Electric-Barber Colman 1" Mixing Valve 14Cv OEM VB-7313-0-4-8
Schneider Electric-Barber Colman Calibration Tool Kit (Al-95) OEM TOOL-95
APC by Schneider Electric Replacement Battery Cartridge #132 - Sealed Lead Acid
Schneider Electric LXM23CU07M3X AC Servo Drive
PRESSURE SWITCH 1.5-35BAR SPDT FLANGE - XMLA035A2S11 (Fnl)
NIB SCHNEIDER ELECTRIC STBAC01210K ANALOG C OUT 2CH 0-20MA KIT CONNS, BASE
SCHNEIDER MGP1253X 125AMP 3 POLE PANELBOARD MCCB COMPACT NSX160F MERLIN GERIN
APC by Schneider Electric APCRBC115 UPS Replacement Battery Cartridge - 0.23 Hou
SCHNEIDER POWERPACT 4 160AMP 3 POLE MCCB COMPACT NSX160F TM160D TRIP MGP1603X
Schneider ME4zr 17071 - PowerLogic ME Kilowatt Hour Meter NIB
Solid State Trip with LSI - 630amp Schneider LV432093 Micrologic 5.3 Compact NS
NEW SCHNEIDER SEA9BN6 ACTI 9 ISOBAR 6 WAY 3 PHASE 250A MAX DISTRIBUTION BOARD
Schneider Electric SE36B250 Loadcentre 250A 12 Way TP+N Distribution Board
1 pcs Module: safety relay; Mounting: DIN; Safety cat:4; -10÷55°C; IP20
Schneider Electric 490-NAC-721-00 490NAC72100 Modbus NIBFS Lightning Aresstor
Schneider Electric-Barber Colman Room Temp.Transmitter, 50/90F OEM 2220-053
TIME DELAY RELAY, DPDT, 999H, 240VAC NWK PN: TDRPRO-5100
Schneider Electric Ethernet Bus Module BMX-NOM-0200 BMXNOM0200 60 Day Warranty!
SCHNEIDER ELECTRIC LUB32 POWER BASE MODULE W/ LUCA32B
NIB Sealed Schneider Electric VW3A3307 - 60 day warranty
3 NEW at MostElectric: MGN61523 SQUARE D SCHNEIDER MERLIN GERIN
schneider merlin gerin 16557 PRD65R 1P+N IN 20KA RIP.CL.2
Schneider Electric atv31c075m2zh28/Altivar 31 Inverter
Power Switch Schneider Electric Compact nsx250b lv431110 3p3d 250a 690v
Schneider Electric Modicon Micro TSX Analog Input tsxaez802
PRESSURE SWITCH 0.4-4BAR SPDT FLANGE - XMLA004A2S11 (Fnl)
Schneider Electric kna100ab4 Aluminium canalis KNA Power Supply, mounts...
NEW! Apc By Schneider Electric AR7706 Rack Mount Black
Schneider Electric bmxddi3202k
Schneider Electric Operator Panel, xbt-r410
Energy meter 63a threephase mono, a9mem3150, schneider electric merlin gerin
Schneider Electric Analogue Input 8i High Level, tsxaey810
SCHNEIDER ELECTRIC IEC Magnetic Contactor,24V,9A,Revrsing, LC2D09B7
1 pcs Module: safety relay; Mounting: DIN; Safety cat:4; -10÷55°C; IP20
schneider merlin gerin 04122 POWERCLIP 250A 4P L1000
Merlin gerin lc1d80e7 Schneider Electric Spa-Contactor 80a 48vac 50/6
FILTER WITH FAN 58 M3/H 3.6W IP54 - NSYCVF38M24DPF (Fnl)
ACTUATOR, KEY, HARMONY XB5 PUSHBUTTON NWK PN: ZB5AG0814
ACTUATOR, KEY, HARMONY XB4 PUSHBUTTON NWK PN: ZB4BG120
EMPTY CONTROL STATION, CTRL & SIGNL UNIT NWK PN: XAPA1110
LIMIT SWITCH, 240VAC, 10A, TOP PUSH ROD PLUNGER NWK PN: 9007MS01S0100
ACTUATOR, KEY, HARMONY XB4 PUSHBUTTON NWK PN: ZB4BG114
Schneider Electric-Barber Colman Linevoltfcu Bacnet Cntrl White OEM SER8300A0B11
Schneider Electric-Barber Colman Summer-Winter Stat, 16#Da, 25#Ra OEM 2218-133
Schneider Electric-Barber Colman Summer-Winter Stat, 16#Ra, 25#Da OEM 2218-132
New in Box Schneider Electric LC1D65ABD Contactor.
New in Box Schneider Electric LV429761 Compact NSX Circuit Breaker.
New in Box Schneider Electric LV430840 Compact NSX Circuit Breaker. 160 Amp.
New in Box Schneider Electric LV429760 Compact NSX Circuit Breaker.
New in Box Schneider Electric LV430629 Compact NSX Circuit Breaker.
INDUCTIVE PROXIMITY SENSOR, 8MM-15MM, 24V-240V NWK PN: XS630B1MBL2
SWITCH, INDUSTRIAL PUSHBUTTON, 22MM NWK PN: XB4BW34G5.
SWITCH, PUSHBUTTON, 1.2A, 600V, SCREW NWK PN: XB5AW33G5
USB SIGNAL TOWER, RED/ORA/GRN/BLU, 5V NWK PN: XVGU3SHAV
EMERGENCY STOP SWITCH, SPST-NC, 120VAC NWK PN: XALK198H7
SENSOR, INDUCTIVE, 20MM, 12-48VDC NWK PN: XS8C4A1PCG13.
Schneider Electric df2ln1251 fuse cartridge 1250 a fuse
Schneider Electric Reflex Light Barrier 6m Acoustic. + Relay xujb 06 (xujb 06031h60)
Merlin gerin ksa25bt42 Schneider Electric Spa-alim. Central 250a [ksa250abt4]
SCHNEIDER MERLIN GERIN 30430 TM160D 3P/3R NS160 [LV430430]
Schneider Electric LC1-D253MA65, New, LC1D253MA65, Fast Shipping
New Sealed Schneider Electric 140AVI03000 Analog Input Module 8Ch Bipolar
Schneider Electric-Barber Colman 24V, Floating, 35Inlb, S/R, Dirmt OEM MF40-7043
PHOTO-ELECTRIC SENSOR 40M - XUX0ARCTT16 (Fnl)
Tower Light LED Assembly, Schneider Electric, XVC6M15S
Schneider Electric 140DDO84300 Output Module - New No Box
1 NEW at MostElectric: 60173 SQUARE D SCHNEIDER MERLIN GERIN
DOOR-MOUNTED ROTARY OPERATED HANDLE NWK PN: 9421LH46
IEC Magnetic Contactors, Schneider Electric, LC1D80T6
SCHNEIDER ELECTRIC IEC Magnetc Cntactr,24VAC,50A,1NC/1NO, LC1D50AB7
SCHNEIDER ELECTRIC IEC Magnetic Contactr,120VAC,50A,1NC/1NO, LC1D50AG7
SCHNEIDER ELECTRIC IEC Magnetic Contactr,208VAC,50A,1NC/1NO, LC1D50AL7
SCHNEIDER ELECTRIC IEC Magnetic Contactr,480VAC,50A,1NC/1NO, LC1D50AT7
SCHNEIDER ELECTRIC IEC Magnetic Contactr,240VAC,50A,1NC/1NO, LC1D50AU7
SCHNEIDER ELECTRIC IEC Magnetic Contactor,24V,50A,1NC/1NO, LC1D50ABD
NEW APC AR8123BLK Schneider Electric Rack Shelf - 1U Wide Rack-mountable Black
SCHNEIDER ELECTRIC 24V FIP MODULE TSXEEF08D2
SCHNEIDER ELECTRIC 24V FIP MODULE TSXEEF16D2
PHOTO-ELECTRIC SENSOR 2M - XU9M18MA230 (Fnl)
CIRCUIT BREAKER 30KA 3P/3T 100A - EZC100H3100 (Fnl)
SWITCH, PUSHBUTTON, 1.2A, 600V, SCREW NWK PN: XB5AW34G5
SWITCH, PUSHBUTTON, SPST-NO, 10A, YELLOW NWK PN: 9001KR4YH5
SWITCH, PUSHBUTTON, 1.2A, 600V, SCREW NWK PN: XB4BW35G5
SCHNEIDER ELECTRIC TM238LDA24DR Modicon PLC CPU Digital Out ModBus Networking
Logic Relay, Schneider Electric, SR3B261BD
SCHNEIDER ELECTRIC 170AEW34000 I/O BASE W/ 170LNT71000 COMMUNICATION ADAPTER
Schneider Automation AS-B803-008 Input Module ASB803008
SCHNEIDER ELECTRIC MODICON 110-CPU-411-00 110CPU41100
SCHNEIDER 140CRP93100 MODICON QUANTUM RIO HEAD 3908
CSI MR88-C
FS Schneider Electric TBUM297191 (SCADA Pack 297191) 4-20 ma output add on board
SCHNEIDER ELECTRIC 140-DRA-840-00 MODICON QUANTUM RELAY OUT 16X1 140DRA84000
Schneider Automation Telemecanique Modicon TSX MICRO TSX3721001 *Fast Shipping*
Pelco Schneider Electric PP350 Parapet Wall Mount For Spectra
Profibus Module, TSX 490 NAE 911 00 Modicon Schneider Electric
Schneider Electric Lexium VW3M4102 LXM 15 75A EMC Input Line Filter
SCHNEIDER CPU MODULE TSX P57102 TSXP57102
NIB SCHNEIDER LTMEV40BD EXPANSION MODULE TESYS T- 940492 24VDC LTM-EV40BD
VW3A1101 painel de opera??o de inversor Schneider ATV61/71