SIEMENS 6DR2100-5

來自接地系統(tǒng)混亂時的干擾 
接地是提高電子設(shè)備電磁兼容性(EMC)的有效手段之一。正確的接地,既能抑制電磁干擾的影響,又能抑制設(shè)備向外發(fā)出干擾；而錯誤的接地,反而會引入嚴(yán)重的干擾信號,使DCS系統(tǒng)將無法正常工作。 
DCS控制系統(tǒng)的地線包括系統(tǒng)地、屏蔽地、交流地和保護(hù)地等。接地系統(tǒng)混亂對DCS系統(tǒng)的干擾主要是各個接地點(diǎn)電位分布不均,不同接地點(diǎn)間存在地電位差,引起地環(huán)路電流,影響系統(tǒng)正常工作。例如電纜屏蔽層必須一點(diǎn)接地,如果電纜屏蔽層兩端A、B都接地,就存在地電位差,有電流流過屏蔽層,當(dāng)發(fā)生異常狀態(tài)如雷擊時,地線電流將更大。

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Banner Valu-Beam Photoelectric Sensor SMA95RSR 90-130vac

5pc Crydom Relay 6101A 10-32vdc input

5pc Allen Bradley Relay 1771-JIA 120vac Input

13pc Buss Fusetron Dual Element Fuses FNM-6

Daniel Woodhead 27W47 Watertite Connector 20A 125V NEMA L5

Allen Bradley 2 Position Selector Switch 800T-H2 Series T

49pc Allen Bradley 1492-N47 End Anchor

Allen Bradley Keyed Cylinder Lock Selector 800T-H4803

Cutler Hammer Push Button Operator E34PB3

Cutler Hammer Push Button Operator E34PB2 Red

Cutler Hammer Selector Switch Operator E34VHBK1 3 POSITION

Matsushita Circuit Breaker CP-C BAC201505 2 POLE 5 AMP 245VAC

ABB Circuit Breaker S271K6A 480v 6amp 1 pole

Turck Device Net Adaptor Tee RSM2RKM57DGT

Murr Elektronik Art. No. 676166 Panel Receptacle, 110VAC, 15A W

2pc Omron PLC Input Modules C200H-ID211 12-24VDC

Sylvania / Joslyn Starter Overload Heater 2527

Sylvania / Clark Starter Overload Heater 2530

Allen Bradley Auxillary Contact 595-BB Ser B

Philips THYRISTOR MODULE 20W ECG5720

4pc Turck Relay C3-B30 6v AC/DC coil 3 pole 11 pin

emecanique LED Pilot Light Green

2pc Allen Bradley Photoswitch Sensor Base 42LTB-5000

Square D Universal Adder Deck 8501XB-20

Moeller Miniature Circuit Breaker FAZ-S16 480V

ASCO Red Hat Valve 1/4" Pipe

Softnoze ProxProbe Adapter PPA-08-25-03 8x25x3mm

Allen Bradley Bulletin 193-BSB16 1.10 - 1.6 amp

Siemens Relay 3TH3022-0A 110vac coil

Electro Matic Products Limit Switch Roller Arm EL120-69421

Moeller Circuit Breaker FAZ-B15-NA 15amp 1 pole

Electro Matic Products Limit Switch Roller Arm EL120-60400

Spectrol Multi Dial Model 15 10 Turn 3 Digit

Micro Switch Proximity Sensor FYBC5C5-2 0-275VAC

Siemens Relay 3TH3040-0A 110vac coil 4 N.O.

Phoenix Contact Isolation I/O Module ST-OV3-120AC

Square D Mushroom Button Kit 9001-K16R 9001K16R

3pc Buss Low Peak Yellow Fuse LPJ-20SP

Turck Cordset U1211-13 VBS-2-B669-5M-W?S 5.3T

20pcs Allen Bradley Center Jumper 1492-CJ7-3

emecanique Pilot Light Module ZA2BV6-120V

Allen Bradley Illuminated Selector Switch 800T-16HX2KB6 Ser T 120vac

Allen Bradley 193-BSA90 Overload 0.8 - 1.0 amp

SKF Roller Bearing 6013-2ZJEM

Allen Bradley 10' VFD Programmer Cable A22105-134-03

Allen Bradley Small Push Button 800MR-B6A Extended Red Head Series C

Clippard Minimatic Pilot Air Valve MPA-7

3pc INA Roller Bearing D9

4pc Turck Sensor Cord Set KB 4T-2 4 wire

33pcs Allen Bradley 1492-U4 Terminal Blocks

emecanique Circuit Breaker GB2-CD20 12amp

4PC Allen Bradley 1771-IAD AC Input Module

INA Roller Bearing 81108TN

Square D Push Button Operator 9001 KR4R Serie H Red Mushroom Head

Allen Bradley 800T-B6 Ext. Red Push Button w/ 800T-XD1R Logic Reed Contact

Allen Bradley 3 Position Selector 800T-J91 w/ 800T-XAR Logic Reed Contact

Square D Limit Switch Lever Arm 9007 CA-2

3pc Allen Bradley Thermal Overload Heater W19

Cutler Hammer Limit Switch Roller Arm E50KL201

2pc SCR Diode PEC-1 CR38148

TIMKEN Tapered Roller Bearing Cup 49520

Hydac Hy-Pro Hydraulic Filter Element HP16RNL5-3MB

3 Allen Bradley Circuit Breaker 1492-ACBH1 Aux. Contact

emecanique Thermal Overload Unit LR2D1307 1.6 - 2.5 AMP

emecanique Contactor LC1D0910 BD 24vdc coil

Allen Bradley Relay 700-MB400 110v coil 195-MA22 Contact block

5pc Allen Bradley 700TBS-24 24VDC 2A Solid State Terminal Block Relay

Culter Hammer Proximity Sensor E57MAL18A2 90-250VAC

2pc Bryant Twist Lock Receptacle L10-30 30AMP 125/250VAC

Automation Direct Proximity Sensor AE1-AN-1H 10-30vdc w/ cordset

Allen Bradley 889R Sensor Cordset 889R-F4EA-5 Series B IN BAG

IVO 6 DIGIT COUNTER F514 650AA3B 24vdc Input

Sylvania Selector Switch UDAC3A 3 Position

4pc Banner Multi Beam Power Block 2PBA UNUSED

Allen Bradley Relay 700-CFB310Z 24vdc Coil

Allen Bradley Limit Switch Roller Lever 802T-W1H Series 1

Chromalox Heater NSL-1405 120v 500watt

4pc Crydom Relay 6201A AC Input 90-140vac

5pc Buss Tron CC Class Time Delay Fuses FNQ-6/10

Square D Mushroom Button Kit 9001-K16G 9001K16G Green

PHD Cylinder Reed Switch AN12-20

Tempco Heater Band 3930290 100 watt 240vac 2.5" Diameter

6pc Assortment Square D Starter Overload Heater B2.40

Allen Bradley KwikLink Cordset Connector 1485K-P6F5-C Series A

3pc Allen Bradley Starter Overload Heater N31

7pc Buss Fusetron Time Delay Fuses FNM-12

Crouse Hinds Sensor Cord Set 5000109-13S 600VAC 13 AMP 3 wire

Allen Bradley 800T-QSTH10G Miniature Pilot Light

Moeller IEC Circuit Breaker FAZ-2-C1

emecanique IEC Overload Relay LR2D13X6 1.25 - 2amp

Allen Bradley 140-L2 & 140-L12 Protected Starter Terminal Bar

Pass & Seymour Turnlok Receptacle L1630-R

Klockner Moeller Contactor DIL00AM 115VAC COIL 7.5HP @ 480VAC

Appleton Cord Grip CG-112125 1.125 - 1.250 Cord Range

Omron Timing Relay H3Y-4 0-0.5 Seconds 120vac power

Dodge / Reliance Flange Mount Bearing F2B-8C-100

Watlow Solid State Relay SSR-240-10A-AC1

Omron Timing Relay H3Y-4 0-1.0 Seconds 120vac power

Crouse Hinds Sensor Cord Set 5000109-13 600VAC 13 AMP

Square D Illuminated Push Button 9001K1L Series J

Appleton Unilet 1 1/2" LB

Allen Bradley Protected Motor Starter 140-MN-0100 Series A

3pc Arrow Hart Twist Lock Socket L6-30P 30amp 125/250vac

Allen Bradley Motor Control Terminal Link 140-L13 & 140-l12

Omron Timer H3M 24VDC 1M * 10M * 1H * 10H

Woodhead Sensor Cord Set 105000A01F1202 5 pole 12'

Allen Bradley Relay 700-CF400D 24vdc coil

Hubbell Hospital Grade Duplex Receptacle IG2182I IVORY

Omron PLC Power Supply C200HW-PA204

5pc Bussman Tron Fuses FNQ-2 1/2

3pc Bussmann Buss JTN60030 Finger Safe Fuse Holder 30a

emecanique Thermal Overload Unit LR2D1306 1 - 1.6 AMP

2pc Square D Interlock EK300-1

5pc Allen Bradley 1492GH Circuit Breakers 2amp & 15amp

Asco Vavle Coil 27-462-6D 480v

4pc IDEC Relay IDC15 10-36vdc input

Allen Bradley Flex I/O Scanport Module 1203-FM1 Series B Rev C

Square D Proximity Sensor 9006DPD321 100-220VAC

SMC Pneumatic Cylinder CD02KB32-Z0D

5pc Killark Receptacle Cover FSBC 0067500

TOUGH GUN 15' LINER .035-0.45 No. 415-35-15

ABB Circuit Breaker S281K4A 480v 4 amp 1 pole

Micro Switch Push Button Contact Block PTCC

Allen Bradley 800M-CA3 Illuminated Push Button Orange

Allen Bradley 800M-CB6 Illuminated Push Button Red

Allen Bradley 800M-CA9 Illuminated Push Button Green

Allen Bradley 800MR-QT24 Push to Test Pilot Light

Culter Hammer Circuit Breaker WMS1B10 1 Pole 10amp 240vac

2pc Balluff Sensor Cordset C04HEL04TY003M 4 pin Single Key

2pc T & B Harting Connector Wiring Hoods

ABB Relay KC31E 24vdc coil

SUNX Proximity Sensor GL-18HL 10-30vdc

Cutler Hammer Light Module E22D24

emecanique Circuit Breaker GB2-CD10 5amp 2pole

emecanique Circuit Breaker GB2-CD16 10amp

Harrison / Woodhead Sensor Cordset 705002D02F120 5 Pole Male 12' IN BAG

2pc Amphenol Flange Mount Plug 97-3102A-18 0850 5 pin Male

5pc Potter & Brumfield Ice Cube Relay R10-E1W2-V185 12VDC

Amphenol MS Military Connector MS3106A22-10P 4 pin male

Moeller Thermal Overload Z00-1.6 1.0 - 1.6 amps

4pc Potter & Brumfield R10-E1-X2-V185 12vdc 8 blade

3pc Sylvania / Joslyn Starter Overload Heater 2439

3pc Sylvania / Joslyn Starter Overload Heater 2451

2pc Allen Bradley DC Relay 700DC-F400 24vdc coil

Cutler Hammer 3TA100G6K Terminal Connector for E & G Frame Circuit Breakers

Banner Fiber Optic Cable IAT23P

GE Miniature Push Button CR104A8212 22mm size

Mars Universal Timer 32391 .1 - 8 Minutes 19-208 vac Input

Allen Bradley Circuit Breaker 1489-A1D200 20amp 277vac 48vdc

Allen Bradley Circuit Breaker 1489-A1D050 5amp 277vac 48vdc

Allen Bradley Circuit Breaker 1489-A1D030 3amp 277vac 48vdc

emecanique Pilot Light Body ZA2BW065-24V

emecanique Pilot Light Body ZA2BW062-24V

Allen Bradley DeviceBox 1485P-P4T5-T5 Series A

FMC Link-Belt Bearing FX3-U210H

6pc Cutler Hammer Type G Lens Red Blank E30KG10 IN PACKAGE

Allen Bradley Circuit Breaker 1492-CB1G010

Micro Switch Proximity Sensor 972AB2HM-A3P-L

Allen Bradley Contactor 100-A18NZ*3 24vdc Coil

5pc Square D Thermal Overload Heater A2.81

Numatics Actuator Switch 940-100-002

Siemens 3VU9165-1AB02 Contactor Bus Bar

Allen Bradley Push to Test Pilot Light 800MR-PT16

ARO Pneumatic Mini Valve Model 214-2-C

emecanique Push Button Operator ZB3BW17

emecanique Push Button XB3BA25

Thomson Multitrac Linear Bearing MA M16

Mallory Sonalert Buzzer SC648H

6pc Allen Bradley Overload Heater W20

Square D Thermal Overload Relay 9065 TD 0.8 0.8A - 1.2A

Noshok Gylcerine Filled Pressure Gauge 2.5" 3/8" 1500

4pc Bussman Low Peak Fuses LP-CC- 1 1/2

Projects Unlimited Sounder Buzzer EAI-382K 30-120VAC AC/DC Constant Tone

Crouse Hinds Mini-Line Field Attachable Device Net Plug CHDN-AE-NG

Cutler Hammer Type M Relay D23MR20A 2 n.o. contacts 120v coil

5pc Buss Limitron CC Class Current Limiting Fuses KTK-R-20

emecanique Pilot Light Module ZA2BV6

emecanique Contact Block ZA2BZ103

emecanique Padlocking Device GV2V01

4pc Micro Switch Limit Switch Wiring Plug VX1A-01 for VX11-C1 Switches

Tolomatic Reed Switch SW# 211318 SWBC410 TU IN BAG

3pc ITE Thermal Overload Heater B35

5pc Coax Coaxial Tee 3 Way Adaptor

Modicon Molded Terminator Cable 990NAD23011 IN PACKAGE

emecanique Pilot Light Module ZB2BW061

Reid Tool Supply Two-Arm Straight Clamping Handle SDB-2 IN BAG

14pc emcanique ZB2-BE102 & ZB2-BE101 Contact Blocks

2pc Bernstein Limit Switch I88-U1Z

3pc Square D QO130 Circuit Breaker 1 Pole 30amp

Omega "J" Thermocouple Extension Cable

Vickers Pneumatic TJ Cylinder Bore Kit 6333U-045

IPTCI Bearing ER205 16 SET SCREW LOCK INSERT SNAP RING