1756-L73 /B控制器_漳州鼎晟达自动化设备有限公司

1756-L73 /B控制器

PLC 控制系统的抗干扰能力是关系到整个控制系统运行的关键因素之一，而接地系统是PLC安装和应用过程中的重要环节。针对PLC控制系统中存在的干扰问题，重点探讨了系统接地类型、方式及接地装置。实际结果表明，采取良好的接地措施，对提高PLC控制系统的抗干扰能力。

引言

随着国民经济的快速增长，国家智能电网计划建设更多高参数、大容量的燃煤火电机组，以满足不断增长的电能需求。高参数、大容量燃煤火电机组的辅助PLC控制系统的控制结构和控制范围发生了巨大的变化，因此，对控制系统的可靠性要求更为严格。

PLC系统的抗干扰能力已越来越受到人们的重视。合理、可靠的系统接地是提高控制系统抗干扰能力的重要保证。为了保证PLC控制系统的监测控制精度和、可靠运行，从设计、设备的选型和安装、调试、生产维护各个环节对PLC控制系统的接地进行控制。本文就多个PLC控制系统现场实际应用的情况，探讨了如何通过完善PLC控制系统的接地来提高系统的抗干扰能力，从而实现系统的运行。

一、干扰的产生

PLC控制系统应用现场的干扰源种类繁多，尤其是大型电厂更为复杂。干扰的来源主要包括以下几个部分。

①PLC控制系统内部

PLC 控制系统内部干扰源主要有元器件的固有噪声、电源系统等。

②PLC控制系统外部

PLC控制系统外部干扰源主要有闪电、雷击、电气设备的电磁场、电火花等。

③PLC控制系统和周围其他系统的电位差等

在PLC控制系统和周围其他系统的电位差等干扰中，有些干扰源有规律可循，可以通过的手段检测并加以控制；有些干扰源则随机出现，难以捕捉。但各种干扰源都是通过的途径对控制系统产生影响的，这些干扰途径主要是以“路”或“场”的形式出现。

1.1 “路”的干扰

“路”的干扰是指干扰通过电路（主要是控制系统的过程通道或电源系统）进入PLC控制系统。A/D、D/A转换设备和各种输入装置都有可能成为各种干扰的通路。另外，过程通道和PC计算机之间的公共地线也会成为干扰通路。

“路”的干扰分为串模干扰和共模干扰。

串模干扰是指干扰信号叠加在输入信号上的一种干扰方式。这种干扰信号的特点是它与输入信号串联，存在于同一个回路中，并且全部施加在接收被测信号设备的输入端。干扰信号可能是信号源内部产生的，如图1(a）所示；也可能是由导线感应进来的，

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**REPAIR** SIEMENS 6ES7317-2AJ10-0AB0 (6ES73172AJ100AB0) 3 Month Warranty!! OBO!

Siemens 6SN1123-1AA00-0LA1 (6SN11231AA000LA1)

SIEMENS 6DS1-312-8BB USPP 6DS13128BB

SIEMENS 6FX1154-8BB01 VIDEO INTERFACE *FACTORY SEALED*

6DS1001-8AA , SIEMENS Teleperm 6DS10018AA TELEPERM

SIEMENS 6FC5103-0AD20-0AA0 USPP 6FC51030AD200AA0

SIEMENS 3VF4231-1DK41-0AB1 USPP 3VF42311DK410AB1

SIEMENS R15A02C235 USPP R15A02C235

Furnas 30GF32A2VAA NSNP **GENUINE** Siemens

SIEMENS 6ES5244-3AA11 SIMATIC S5 TEMP. CONTROL MODULE 6ES5-244-3AA1 6ES52443AA1

Siemens 6SN1118-0DH21-0AA0 (6SN11180DH210AA0)

SIEMENS AA17-C001A-A USPP AA17C001AA

SIEMENS AA17-F003H-A USPP AA17F003HA

SIEMENS 1FK70805AF711DA0 NSFP 1FK70805AF711DA0

6DS1300-8AB , SIEMENS Teleperm 6DS13008AB 6DS1300-8AB

6DS1002-8AA, SIEMENS,6DS10028AA, TELEPERM

6FX2007-1AC13,SIEMENS REMOTE CONTROLLER 6FX20071AC13

SIEMENS 6RA2203-8DK27-0 NSFP 6RA22038DK270

SIEMENS 32.1811.742-00 USPP 32181174200

SIEMENS 6RA2211-8DD20-1 USPP 6RA22118DD201

SIEMENS 6ES7650-0NF17-0YX1 USPP 6ES76500NF170YX1

Siemens 3RG7845-4DD01 Light Curtains, Transmitter, Receiver & Brackets - NEW

Siemens 6SE92 Micro Master Kit (opened box) - NEW

Siemens Teleperm 6DS1601-8BA, 6DS 1601-8BA Baugruppe

1PC Siemens Video Module: Siemens 6FX1154-8BB01

6ES5921-3WA13, SIEMENS Simatic S5 6ES59213WA13 CPU921

Siemens 6SN1118-0DM31-0AA0 611 Digital, Neu, inkl. Mwst.

SIEMENS 3KL5530-1AG00 NSFP 3KL55301AG00

Siemens FXD63B250 NSFP **GENUINE** Furnas

SIEMENS SJD69300 USPP SJD69300

SIEMENS 6SC9844-0HH10

Siemens Simatic S5 OP 395 Typ 6ES5395-0UA31 Version Francaise 6ES5 395-0UA31

2XV9450-1AU00, SIEMENS 2XV94501AU00

6GK1105-2AD10 , SIEMENS 6GK11052AD10

6DS1702-8RR, SIEMENS Teleperm 6DS17028RR Teleperm

Siemens Servo Motor 1FK7042-5AK71-1GG5-Z

Siemens Simatic S7 Siwarex Siwarex FTA 7MH4900-2AA01 7MH4 900-2AA01 E:06new neu

SIEMENS Mobile Panel 277 10'' 6AV6645-0BE02-0AX0 E-Stand:06

SIEMENS 6ES5-188-3UA32 USPP 6ES51883UA32

SIEMENS 6SN1118-0NH01-0AA1 6SN1 118-0NH01-0AA1 PLC NEW

Siemens 6AV3688-4EY07-0AA0 (6AV36884EY070AA0)

Siemens Simatic S7 PC FI45,6ES7645-2AB00-0CA0,6ES7 645-2AB00-0CA0

Siemens Simatic S5 095F,6ES5095-8FA01,6ES5 095-8FA01

Siemens Simatic S5 095U,6ES5 095-8MB04,6ES5095-8MB04

Siemens Simatic S5 6ES5955-3LC42 Rack S5-135U/-155U + 6ES5183-3UA13

Siemens Simadyn D 6DD1611-0AF0 MM3 V.E Koppelspeicher

Siemens C98043-A7003-L4 C98043A7003-L4 Power Interface Modul --

NOU 6ES7314-6CH04-0AB0 Siemens 6ES7 314-6CH04-0AB0,6 m. warranty

Siemens Simadyn D 6DD1600-0AC0 PM1 Prozessmodul

NOU 6SL3532-6DF71-0RA1 SIEMENS 6SL3 532-6DF71-0RA1 , 6 months warranty

NOU 6ES7441-2AA04-0AE0 Siemens simatic S7 6ES7 441-2AA04-0AE0, 6 months warranty

6ES5581-0EA11, SIEMENS Simatic S5 6ES55810EA11 CP581-386/4MBYTE EX.SIL.DISK

SIEMENS 6ES5-951-7ND41 USPP 6ES59517ND41

NEW - ORIGINAL PACKAGING Siemens 6GT2005-0BA10 MOBY I 6GT2 005-0BA10 SIM 42

SIEMENS 6ES5-308-3UB11 NSFP 6ES53083UB11

SIEMENS SED2-15/32X NSPP SED21532X

SIEMENS 4AM7595-0AT60-0C USPP 4AM75950AT600C

**REPAIR** A06B-6079-H206 (A06B6079H206) by SIEMENS - 3 Month Warranty!

SIEMENS 6ES7 315-2EH13-0AB0 --

6GK7343-1GX11-0XE0, SIEMENS new in open box 6GK73431GX110XE0

6ES5944-7UA21, SIEMENS Simatic S5 6ES59447UA21 CPU 944

1 PC New Siemens 6ES7314-6CH04-0AB0 6ES7 314-6CH04-0AB0 In Box

SIEMENS 6ES7 154-8AB01-0AB0, MODULE, SIMATIC DP, IM 154-8 PN/DP PLC, NEW*

SIEMENS 6AV3-515-1EB32-1AA0 NSFP 6AV35151EB321AA0

SIEMENS 1FK6042-6AF71-1EA2 USPP 1FK60426AF711EA2

Siemens G34901-A1027-H2-C1 control board / C 40-1363-01.02

SIEMENS SIMODRIVE 6SN1145-1AA01-0AA1

Siemens simatic S7 Anschaltung IM 467 6ES7467-5GJ02-0AB0 // 6ES7 467-5GJ02-0AB0

SIEMENS 6GK1105-3AA00 USPP 6GK11053AA00

Siemens Simatic C7-633 DP Kompaktsteuerung Typ 6ES7 633-2BF02-0AE3

Siemens SBS-08C 616.121.0 H1.1.029.V Platine für Spritzgiessmaschinen

SIEMENS SIFLOW FC070 7ME4120-2DH20-0EA0 7ME4120-2DH20-0EA0

Siemens Simadyn Kommunikationsbaugruppe 6DD7090-0AA20 E-Stand: 1

Siemens Simatic S7 Siwarex Siwarex FTA 7MH4900-2AA01 7MH4 900-2AA01 new neu

6ES7 633-2BF02-0AE3 Siemens Simatic C7-633 DP 6ES7633-2BF02-0AE3

Siemens 6DR2104-5 Kompaktregler

Siemens Simatic S7 CPU 416-2,6ES7 416-2FK02-0AB0,6ES7416-2FK02-0AB0

Siemens Simatic S7 CPU 416-2,6ES7 416-2XL01-0AB0,E:02

Siemens Sinumerik System 3 9"Bedientafel,6FC3988-5MC25,6FC3 988-5MC25

NEU-OVP Siemens 6GT2005-0BA10 MOBY I 6GT2 005-0BA10 SIM 42

NOU 6ES7467-5GJ02-0AB0 Siemens simatic 6ES7 467-5GJ02-0AB0, 6 months warranty

Siemens Teleperm M 6DS1607-8AB 6DS1 607-8AB E: 03 Bin?rgeber -sealed-

SIEMENS 6SE7017-8FB61-Z USPP 6SE70178FB61Z

SIEMENS 6ES7-134-0HF01-0XB0 NSFP 6ES71340HF010XB0

SIEMENS 6ES5-436-4UB12 NSFP 6ES54364UB12

SIEMENS 4FC1333-0LA02-1D USPP 4FC13330LA021D

6EA1730-0BA00-0AA1, SIEMENS, SIMATIC PG & software ST7, SIMATIC PG & software ST

Siemens Teleperm 6DS1702-8AA, 6DS 1702-8AA Baugruppe

Siemens Teleperm 6DS1716-8AA, 6DS 1716-8AA Baugruppe

Siemens 6DS1132-8AA 6DS 1132-8AA PU-V 215-2

Siemens 6GT2 811-0AB00-0AA0 Simatic RF670R (ETSI) 6GT2811-0AB00-0AA0 Version:A3

6DS1322-8AA , SIEMENS Teleperm 6DS13228AA

**REPAIR** SIEMENS 6ES5928-3UA12 (6ES59283UA12) 3 Month Warranty!! OBO!!

Siemens 6ES5951-7LD12 One Year Warranty !

Siemens Simadyn PERIPHERIE-SUBMODUL IT42 6DD1606-3AC0

6EA1730-0AA00-1AB0, SIEMENS, SIMATIC PG & software ST7, SIMATIC PG & software ST

6ES5095-8MC03, SIEMENS, Simatic S5, Simatic S5, 6ES50958MC03

SIEMENS SIPLUS S7-300 SM326F 6ES7326-1RF00-0AB0 6AG1326-1RF00-4AB0

SIEMENS 6SE6-420-2UD31-1CA1 NSFP 6SE64202UD311CA1

SIEMENS CP-1613-A2 USPP CP1613A2

1 PC Siemens A5E00104787 840D CNC PCU50 Board In Good Condition

SIEMENS 6SC6500-0NA01 USPP 6SC65000NA01

SIEMENS R15-02-256 USPP R1502256

SIEMENS 6DD1-662-0AB0 USPP 6DD16620AB0

SIEMENS 6ES5 470-4UA12 -NEW-

Siemens 1FK6083-6AZ21-9ZZ9 Z S01 Servo Motor

NEW SIEMENS 2819840-K5004 SMI-5 BOARD 28-19-840-K5004-D55-E3, MAP 4 D55

SIEMENS 6ES5-451-8MD11 NSFP 6ES54518MD11

SIEMENS 6ES5 242-1AA31 799ML-94V-0(ON BACK) CIRCUIT BOARD

SIEMENS CONTROL PENDANT 3-424-2327A02 **

SIEMENS 6DD1642-0BC0 NSPP 6DD16420BC0

SIEMENS 6ES5-955-3LF12 NSFP 6ES59553LF12

SIEMENS 6AV7-500-0BA00-0AA0 NSFP 6AV75000BA000AA0

SIEMENS 6ES5-350-3KA21 NSPP 6ES53503KA21

SIEMENS 6FX1-110-7AD01 USPP 6FX11107AD01

SIEMENS 7ML5720-1AB11-0AA0 *NEW IN BOX*

SIEMENS 6FC3138-3EF CONTROL PANEL 6FX1118-8AD01, 6FC31383EF

SIEMENS 6SE7012-0TP50-Z MASTERDRIVES MC DC/AC DRIVE (AS PICTURED) *NEW NO BOX*

Siemens Simatic 6GF1-710-1AA Monochrome Video camera

SIEMENS SED2-4/31X AC DRIVE *NEW IN BOX*

Siemens Simadyn SRT 400 6DD1682-0CG0

Siemens Power Board Simodrive 6SC6090-0FB00_6SC60900FB00_462.009.9051.00 C D E

RX-2791, SIEMENS 6SC9421-0BA03 CONTROL BOARD

Siemens 1FI5066-0AK01-1-Z Brushless Servomotor NEW

Siemens 6DD1681-0CA2 SIMADYN D Digital Module PLC Simatic SE 20.2 465681.0020.20

SIEMENS 3-424-2202A01 REV. B LCD MONITOR **

SIEMENS 1FT6062-6AH72-4AH0 PERMANENT MAGNET MOTOR 1FT60626AH724AH0

SIEMENS 1XP8001-1/1024 ENCODER **

Siemens SINEC CP 6GK1143-0TB01 / 6GK1 143-0TB01

SIEMENS 6ES5581-3LA11 6ES5 581-3LA11 ``NICE`` Fast shipping

SIEMENS TOUCH PANEL 6AV6 642-0BA01-1AX0 **

SIEMENS DRIVE 6SE9217-3DB40 **

SIEMENS/MOORE 39ACM12CAN APACS ADVANCED CONTROL MODULE 16139-64/05

SIEMENS/MOORE 39NIM421BAN APACS NIM MODULE 16194-32/02

SIEMENS 6DD1640-0AD0 EM11 T I/O Module

Siemens 6FC5111-0CB02-0AA0 / 570 384.9101.01 Circuit Board EXCELLENT!

SIEMENS 6DD2920-0AR1 Transformer SA61

NEW SIEMENS 7ND4120-1AC11-1CA2 SIREC DS DISPLAY RECORDER 90-240VAC

**NEW ** SIEMENS SIMATIC S7 MODULE 6ES7 412-2XG04-0AB0_6ES74122XG040AB0

Berger Lahr, D 650.03, Siemens 220650-30 220666-20 RS 22 Card drive control

NEW SEALED SIEMENS 6ES5460-7LA13 ANALOG INPUT 6ES54607LA13

SIEMENS 6FC5357-0BB11-0AE0 ```NICE` Fast shipping

SIEMENS 6SN1124-1AA00-0BA1 DRIVE SIEMENS 6SN1118-0DM21-0AA0

SIEMENS SIMATIC BOX PC 627 6ES7647-6AA25-0CJ0

NEW Siemens 6ES5924-3SA12 Simatic Processor Module, WARRANTY

SIEMENS 6SE7031-7HH84-1HJ0 CIRCUIT BOARD *FACTORY SEALED*

SIEMENS 6ES7-315-6TH13-0AB0 SITOP S7 CPU

SIEMENS 6GF6200-0AA OPERATOR INTERFACE DISPLAY WITH MONITOR

SIEMENS 6SE7026-4FA87-2DA0 BRAKING UNIT

SIEMENS 6AV36171JC200AX1 OPERATOR PANEL

ALLWEILER AG Pump Siemens Motor_EMTEC-A80 R36DQ_EMTECA80R36DQ

ALLWEILER AG Pump Siemens Motor_EMTEC-A80 R46D-8.6

New, factory sealed SIEMENS 6FX1132-0BA01

NEW SIEMENS 1FK7063-5AH71-1KG3 SERVO MOTOR 1FK70635AH711KG3

FACTORY SEALED SIEMENS COMMUNICATION PROCESSOR CP 1413 C79458-L2343-A2 Ver:06

NEW SIEMENS 1FK7040-5AK71-1FH2 SERVO MOTOR 1FK70405AK711FH2

SIEMENS 6DD1642-0BC0 EA12 Analog Output New In Box

SIEMENS 6QM1340 VOLTAGE DETECTION BOARD NEW/BOX

NEW SIEMENS 6ES7-216-2AD00-0XB0 CPU MODULE 6ES72162AD000XB0

SIEMENS 6ES5 463-4UB12 ANALOG INPUT MODULE NEW IN BOX

SIEMENS 6ES5 463-4UA12 ANALOG INPUT MODULE NEW IN BOX

SIEMENS 6ES5 530-3LA12 COMMUNICATIONS MODULE NEW IN BOX

NEW SIEMENS 6SN1123-1AA00-0CA2 SIMODRIVE W/ 6SN1118-0NJ01-0AA1 CARD

NEW SIEMENS 1FK7040-5AK71-1EB0 SERVO MOTOR

Siemens S5 6ES53403KB42 module

Siemens 6ES5928-3UA12 (NEW Processor Module)

Siemens 6SE7090-0XX84-0BJ0 CUSA Active Front End (AFE) Logic Board

Siemens C7-633 PLC processor / operator interface 6ES7633-2BF00-0AE3

ITE SIEMENS HFXD63B150 NSFP HFXD63B150

SIEMENS 6ES7-414-1XG02-0AB0 USPP 6ES74141XG020AB0

SIEMENS 6AG4040-0AH30-0AB0 SIMATIC MICROBOX PC 420 6AG40400AH300AB0

Siemens L2/DP Profibus Board, # 1P 6FC5012-0CA03-0AA0, , Warranty

Siemens CPU Module 6ES5 921 3WB15_6ES5921-3WB15_6ES5-921-3WB15_6ES-5921-3WB15

Siemens TI 575-2104 VME PLC

SIEMENS 7SJ6111-5EB22-1FA0/FF OVERCURRENT PROTECTION AND CONTROL

Siemens Permanent Servo Motor 1FT5072-0AC71-9-Z Cincinnati 1-606-3505_Z:H30 K42

SIEMENS SIMADYN D 6DD1601-0AE0 PG16

SIEMENS K3-B400 USPP K3B400

SIEMENS SIMODRIVE 611 POWER MODULE 6SN1123-1AA00-0EA1

SIEMENS SIMATIC BOX PC COMPUTER 627B 6ES7647-6BD26-2BF0 6ES7-647-6BD26-2BF0

AUTOCON INDUSTRIES, MICROCAT,PRECISION DIGITAL,ROCKWELL, US FILTER, SIEMENS 9500

SIEMENS 6ES7 133-0HH01-0XB0 *FACTORY SEALED*

SIEMENS SINUMERIK840DE NCU 571.2 6FC5357-0BB11-0AE0

SIEMENS 9300 DISPLAY PROFIBUS 9300DP-200-ZZZZA

SIEMENS IFK7101-5AF71-1UA0 *NEW OUT OF BOX*

SIEMENS HMD63F800 *NEW OUT OF BOX*

SIEMENS 6ES5921-3UA12 CPU MODULE **

Siemens Simatic S5 6ES5581-3LA11 6ES5 581-3LA11 CP 581/486 MASS STORAGE MODULE

SIEMENS 505-2571 *NEW IN A BOX*

SIEMENS 6SN1130-1AD11-0GA0 USPP 6SN11301AD110GA0

SIEMENS, Z06242L, Z2006 TECH PCB W/SECT DRV SFWR **NIB**

Siemens 3VF3211-6DS71-0AA0 Molded Case Circuit Breaker 160a 160 amp NEW

SIEMENS SIMODRIVE 611 6SN1118-0NH01-0AA0 NEW

SIEMENS 6DR5210-0EN00-0AA9 SIPART PS2 HART POSITIONER *NEW IN A BOX*

SIEMENS 6AV6 542-0CA10-0AX0 SIMATIC PANEL 6AV65420CA100AX0

SIEMENS 6ES7 135-5RB00-0AB0 ANALOG OUTPUT MODULE *FACTORY SEALED*

SIEMENS SIMATIC 6DS1302-8AB XLNT FAST SHIPPING

SIEMENS 6ES5 947-3UA22 6ES5947-3UA22 XLT Fast shipping

SIEMENS 6FX1135-7BB01 6FX1 135-7BB01 XLT Fast shipping

SIEMENS 6AV4012-0AA10-0AB0 6AV4 012-0AA10-0AB0 XLT Fast shipping

AUTOCON INDUSTRIES, MICROCAT, US FILTER, SIEMENS 9506 RTU