IC697CHS790

IC697CHS790

IC697CHS790

IC697CHS790

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（5）来自接地系统混乱时的干扰

　　接地是提高电子设备电磁兼容性（EMC）的有效手段之一。正确的接地，既能抑制电磁干扰的影响，又能抑制设备向外发出干扰；而错误的接地，反而会引入严重的干扰信号，使PLC系统将无法正常工作。PLC控制系统的地线包括系统地、屏蔽地、交流地和保护地等。接地系统混乱对PLC系统的干扰主要是各个接地点电位分布不均，不同接地点间存在地电位差，引起地环路电流，影响系统正常工作。例如电缆屏蔽层一点接地，如果电缆屏蔽层两端A、B都接地，就存在地电位差，有电流流过屏蔽层，当发生异常状态加雷击时，地线电流将更大。

MERLIN GERIN Compact NJHN36000S40ABS?O 

Allen-Bradley PowerFlex 700 5 HP 20BD8P0A3AYNACC?0 480 VAC 

Allen-Bradley PowerFlex 700 1 HP 20BD2P1A3AYNACC?0 480 VAC

SQUARE D SY/MAX CLASS 8030 Type PS35 ser G Power Supply 8030, PS 35 PS-35

SQUARE D SY/MAX CLASS 8030 Type PS35 Power Supply 8030, PS 35, PS35 PS-35

GENERAL ELECTRIC IS200BICMH1ACB 6BA02 BICMH1A 

Indramat AC TVM2-1-050-W1-1?15V TVM2.1-50-220/3?00-W1/22/115

TOSHIBA VT130G3U-4330 

FANUC A06B-0128-B176 7000 WITH PULSECODER A860-0360-V511 

General Electric GE Circuit Board Card IS200WETAH1ADC FA/00 w/ IS210BPPBH2CAA

Yaskawa ServoPack Servo CACR-SR CACR-SR06TZ9SMY?02A

HONEYWELL CIRCUIT BOARD CARD 51400669-100 

Reliance Drive DDS-TLII DDS-TLll DSA-MTR-40D1 DSA-MTR

GENERAL ELECTRIC IS200RAPAG1BAA 

ABB P-HA-RPS-CH1000?00 

GENERAL ELECTRIC IS200VATFG1AAA PC BOARD GE IS200 

Yaskawa Drive ServoPack CACR-SR06TZ0SM CACR-SR06TZ6SM-?E .60kw .80HP

Yaskawa Drive ServoPack CACR-SR30TZ0SM CACR-SR30TZ6SME 

ATLAS COPCO CONTROLS  QCMT34050  4240033881

ABB  AC800M 3BSE018100R1 PM860K01 PM860 3BSE018114R1 3BSE018110R1 TP830

HONEYWELL EXCEL R7510B-1003-2 

FAIRCHILD 24XFS16980002 12-24 VDC 4-20MA / 1-5 VDC EB-18610-1 

US MOTORS NIDEC VERTICAL MOTOR FDF4 11712813-100 

ALLEN BRADLEY 118571 119996 POLE ARM 117428 FOR 1395 DC 

GE IS200 BOARD IS200EMIOH1AFB EMIO H1A GEIS200EMIOH1AF?B, IS200EMIOH1A

GE GENERAL ELECTRIC DS3800HPTKIGIH 6BA09 DS3800

Yaskawa ServoPack Servo  CACR-SR44TZ0SFY?01A 

Yaskawa ServoPack Servo  CACR-SR CACR-SR30TZ6SM-?E

RELIANCE ELECTRIC DRIVER  0-56947-50 

ABB Floppy Disk Module DSMD-113  5736 045-N 

INGERSOLL RAND 39875158 120 VAC 2.5 A 

Allen Bradley Overload Relay 810-A03C 

ABB ASEA CIRCUIT CARD DSMB127  7K 57360001-HG/2 2668 184-584/2

ABB ASEA CIRCUIT BOARD CARD DSMB127  7I 57360001-HG/2 2668 184-584/2

ABB ASEA CIRCUIT BOARD CARD DSMB127  ME8I 57360001-HG/2 2668 184-584/2

ABB ASEA CIRCUIT BOARD CARD DSMB127  SE93472203 57360001-HG

ABB ASEA CIRCUIT BOARD CARD DSMB127  OK 57360001-HG/2 2668 184-584/2

ABB ASEA CIRCUIT BOARD CARD DSMB127  OJ 57360001-HG/2 2668 184-584/2

ABB ASEA CIRCUIT BOARD CARD DSMB127  OH 57360001-HG/2 2668 184-584/2

SICK DMT10 SENSOR DMT10-1213 1023955 3200532014A

GENERAL ELECTRIC C-ESS DS2 PAG1 GDPAG 6BAO7 PC 

Modicon AEG PanelMate Plus MM-PMA1-305  MM-PMA1-30S 110/230v

GE GENERAL ELECTRIC DS3800 DS3800DMPC1F1E 6BA08

GE GENERAL ELECTRIC DS3800 DS3800HMPF1E1D 6BA02

CONTROL TECHNIQUES MHM-490-CONS-00?00 3PH 

SIEMENS SEAFB 24VDC 500VA 

HONEYWELL 51304487 100 K G 51120578-101 

SIEMENS VIM VOLTAGE INPUT MODULE APACS+ 39VIMCCN APACS+39VIMCCN