140DAI54000

140DAI54000

（l）接地要求和方法：
上面介紹了六種接地：供電系統(tǒng)地、保護(hù)地、邏輯地、屏蔽地安全柵地、信號(hào)回路地。對(duì)這六種接地，各家有各家的要求，雖然大都強(qiáng)調(diào)一點(diǎn)接地，接地電阻必須小于1歐姆等，但具體內(nèi)容上差別很大，下面給出幾個(gè)例子介紹常遇到的接地要求和方法。
①供電系統(tǒng)地：在很多企業(yè)，特別是電廠、冶煉廠等，其廠區(qū)內(nèi)有一個(gè)很大的地線網(wǎng)，而通常供電系統(tǒng)的地是與地線網(wǎng)連在一起的。有的廠家強(qiáng)調(diào)計(jì)算機(jī)系統(tǒng)的所有接地必須和供電系統(tǒng)地以及其它（如避雷地）嚴(yán)格分開，而且之間至少應(yīng)保持15m以上的距離。為了*防止供電系統(tǒng)地的影響，建議供電線線路用隔離變壓器隔開。這對(duì)那些電力負(fù)荷很重，而且負(fù)荷經(jīng)常啟停的單位是應(yīng)注意的。從抑制干擾的角度來(lái)看，將電力系統(tǒng)地和計(jì)算機(jī)系統(tǒng)的所有地分開是很有好處的，因?yàn)橐话汶娏ο到y(tǒng)的地線是不太干凈的。

Brand  MITSUBISHI CONTROLLER MDS-B-SPH-37

Brand  MITSUBISHI MDS-B-CVE-55

Brand  MITSUBISHI SERVO MOTOR HC-MF73BK-S3

Brand  MITSUBISHI MELSEC (PART# AJ71QE71N-B5T)

Brand  MITSUBISHI SERVO MOTOR HA-100NCB-S

Brand  MITSUBISHI drive unit ( MDS-B-V14-10)

Brand  MITSUBISHI SERVO MOTOR HA83C-S

Brand  MITSUBISHI MELDAS PCB (Part # MC446)

Brand  MITSUBISHI MELDAS PCB (Part # RK311-11)

Brand  MITSUBISHI MDS-C1-V2-1003

Brand  MITSUBISHI Circuit Board ( RK124-SP-150 )

Brand  MITSUBISHI / TDK power unit PD13A

Brand  MITSUBISHI SERVO MOTOR HC-SF152BK

Brand  MITSUBISHI SERVO MOTOR HC-103T-SZ

Brand  MITSUBISHI SERVO MOTOR HA-300NCB-S

Brand  MITSUBISHI MELDAS PCB (Part # RX213)

Brand  MITSUBISHI MELDAS PCB (Part # MC311C)

Brand  MITSUBISHI PCB (MC442B-1)

Brand  MITSUBISHI Circuit Board ( RK125-SP-220 )

Brand  MITSUBISHI SERVO MOTOR HC-103BS-SZ

Brand  MITSUBISHI SERVO MOTOR HA93NCB-S

Brand  MITSUBISHI PCB (Part # SF-TK)

Brand  MITSUBISHI SERVO MOTOR HA80NT

Brand  MITSUBISHI drive unit MDS-B-SP-15

Brand  YAMABISHI / MITSUBISHI power unit SX-PW1

Brand  MITSUBISHI SERVO MOTOR HC-202S-S1

Brand  MITSUBISHI SERVO MOTOR HA-ME73BK-N1

Brand  MITSUBISHI SERVO MOTOR HC-102BS-SX

Brand  MITSUBISHI CONTROLLER MDS-B-SPJ2-22

Brand  MITSUBISHI Controller MDS-A-CR-90

Brand  MITSUBISHI MELDAS PCB (Part # RF372C)

Brand  MITSUBISHI controller MDS-B-SPJ2X-15

Brand  MITSUBISHI MELDAS PCB (Part # RK155-V24-0303)

Brand  MITSUBISHI Circuit Board ( RK122-V24-3535 )

Brand  MITSUBISHI PCB ( RK122-V24-3520 )

Brand  MITSUBISHI MELDAS PCB (Part # TR23-31)

Brand  MITSUBISHI SERVO MOTOR HA80NCB-S

Brand  MITSUBISHI SERVO MOTOR HA-33NCB-S

Brand  MITSUBISHI PCB ( RK121-V24-2020 )

Brand  MITSUBISHI SERVO MOTOR ( HA-80NC-S )

Brand  MITSUBISHI MELDAS PCB (Part # MC324A)

Brand  MITSUBISHI SERVO MOTOR HC-202S-SX

Brand  MITSUBISHI / MAZAK power unit PD17B

MITSUBISHI Transformer MELDAS-520AMH (1PH, 800VA)

CHUO Electric Transformer BKO-NC6139 (1PH, 800VA)

Brand  MITSUBISHI SERVO MOTOR ( HA80NC-SS )

Brand  MITSUBISHI spindle drive unit MDS-B-SPH-15

Brand  MITSUBISHI SERVO MOTOR HC153BS-SZ

Brand  MITSUBISHI SERVO MOTOR HC-102BS-SZ

Brand  MITSUBISHI SERVO MOTOR HC-MF73BK-S1

Brand  MITSUBISHI Board PD14D-1

Brand  MITSUBISHI Circuit Board ( RK122-V24-4520 )

Brand  MITSUBISHI SERVO MOTOR HA-203NCB

Brand  MITSUBISHI SERVO MOTOR HC153RT

Brand  MITSUBISHI MELDAS PCB (Part # MC724-1)

Brand  MITSUBISHI Circuit Board ( RK156B-V24-1005 )

Brand  MITSUBISHI Circuit Board ( RK124-V14-90 )

Brand  MITSUBISHI Circuit Board ( RK121-V24-2010 )

Brand  MITSUBISHI CONTROLLER MDS-A-CV-55

Brand  MITSUBISHI servo drive unit MDS-C1-SP-04

Brand  Mitsubishi PCB (Part # MC231C)

Brand  MITSUBISHI MELDAS PCB (Part # RF333)

Brand  MITSUBISHI PCB ( RG21B-80B )

Brand  MITSUBISHI SERVO MOTOR HC452S

Brand  MITSUBISHI SERVO MOTOR HC453S

Brand  MITSUBISHI PCB (Part # RK112-11)

Brand  MITSUBISHI MELDAS PCB (Part # MC616)

Brand  MITSUBISHI PCB ( RK122-V14-45 )

Brand  MITSUBISHI PCB (Part # RK112-22)

Brand  MITSUBISHI MELDAS PCB (Part # MC211)

Brand  MITSUBISHI spindle drive unit MDS-B-SPJ-22

Brand  MITSUBISHI SERVO MOTOR HC152BT-SZ

Brand  MITSUBISHI Circuit Board ( RK155-V24-0501 )

Brand  MITSUBISHI PCB ( RK121-SP-37 )

Brand  MITSUBISHI MELDAS PCB (Part # MC461)

Brand  MITSUBISHI SERVO MOTOR HA-ME73BK

Brand  MITSUBISHI ethernet I/F card (4ETH01)

Brand  MITSUBISHI PCB (Part # RK112-21)

Brand  MITSUBISHI SERVO AMPLIFIER MR-J2-20CT

Metrawatt power supply unit GTZ 4108

Brand  MITSUBISHI Controller FCUA-MP10-06

Brand  MITSUBISHI SERVO MOTOR HC-MF73BK-N1

Brand  MITSUBISHI MELDAS PCB Board (Part # MC323D)

Brand  MITSUBISHI control unit FCA50D

Brand  MITSUBISHI SERVO MOTOR HC-SF202K

Brand  MITSUBISHI MELDAS PCB (Part # MC721B)

Brand  MITSUBISHI servo amplifier TRA30

Brand  MITSUBISHI SERVO MOTOR HC-53BS-SZ

Brand  MITSUBISHI SERVO MOTOR HA-FH33C-Y

Brand  MITSUBISHI drive unit MDS-B-SVJ2-07

Brand  MITSUBISHI Circuit Board ( RK427-110)

Brand  MITSUBISHI Circuit Board ( RK427-185 )

Brand  MITSUBISHI Circuit Board ( RK422-75 )

Brand  SANYO LNS-W05 Projector Short Zoom Lens

Brand  MITSUBISHI ELECTRONIC SOFT STARTER MSS-60

Brand  MITSUBISHI PCB (Part # RK111-12)

Brand  MITSUBISHI SERVO MOTOR HA-200C-S

 MITSUBISHI PC Board & SOFTWARE (A70BDE-J71QLR23)

Brand  MITSUBISHI SERVO MOTOR HC-103BT

Brand  MITSUBISHI SWITCH PANEL (Part # KS-MH03A-2MB)

Brand  MITSUBISHI MELDAS PCB (Part # SF-BS)

Brand  Mitsubishi circuit board ( MC471)

Brand  MITSUBISHI SERVO MOTOR HC52T-SZ

Brand  MITSUBISHI Circuit Board ( RK121-V14-20 )

Brand  MITSUBISHI SERVO MOTOR HC-102S-SX

Brand  MITSUBISHI MELDAS PCB (Part # SF-OR)

Brand  MITSUBISHI SERVO MOTOR HC-102S-SZ

 MITSUBISHI OPERATION BOARD (Part # FCU6-DUC32)

Brand  Mitsubishi MELDAS PCB (Part # MC433)

Brand  MITSUBISHI SERVO MOTOR HC-102B-SX

Brand  MITSUBISHI Circuit Board ( RG21B-80A )

Brand  MITSUBISHI SERVO MOTOR HA100-S

Brand  MITSUBISHI SERVO MOTOR HC-53BT-SZ

Brand  MITSUBISHI CONTROLLER ( FCU6-DX561)

Brand  BROADCOM BCM5670A1KEB (36pcs Lot)

Brand  MITSUBISHI MELSEC unit AJ95TB32-16DT

Brand  MITSUBISHI PCB (Part # RK111-11)

Brand  MITSUBISHI SERVO MOTOR HA-FH33CY-S5

MITSUBISHI KEYBOARD SWITCH(Part # KS-4MB915ABKO-NC4157)

Brand  MITSUBISHI SERVO MOTOR HC-52BT-SZ

Brand  MITSUBISHI unit FCUA-DX131

Brand  MITSUBISHI ELECTRONIC SOFT STARTER MSS-45

Brand  MITSUBISHI Circuit Board ( RK485-370 )

Brand  SANYO LNS-WT11 Projector Motorized Lens

Brand  MITSUBISHI SERVO MOTOR HC-53T-SZ

 Texas Instruments TMS320C6415EGLZ6E3 (47pcs, DSP)

Brand  MITSUBISHI battery unit FCU6-BT4D1 [ER6-B4D-1

RIVERSTONE Circuit Board 24-port Card ( X15-GE-24DCSF-A

Brand  Mitsubishi Electric Transformer B-AL-7.5K

Brand  SANYO LNS-W10 Projector Short Zoom Lens for P

Brand  MITSUBISHI ELECTRONIC SOFT STARTER MSS-30

Brand  MITSUBISHI MELSEC-Q PARTS (QA1S68B)

Brand  MITSUBISHI (PART# S-AL-37K)

Brand  MITSUBISHI unit FCUA-DX121

Brand  Mitsubishi Freqrol option unit FR-TK

Brand  MITSUBISHI Circuit Board ( RK483 )

Brand  MITSUBISHI Circuit Board ( RK433-150 )

Brand  MITSUBISHI MELSEC FL-NET I/F UNIT (Part Numbe

Brand  MITSUBISHI PCB (Part # FR-ZCZ)

Brand  MITSUBISHI SERVO MOTOR AMPLIFIER MR-J2-60B

Brand  MITSUBISHI inverter FR-A520-1.5K

Brand  MITSUBISHI Circuit Board ( RK482 )

Brand  MITSUBISHI Circuit Board ( RK485-300 )

Brand  MITSUBISHI Circuit Board ( RK482B)

Brand  MITSUBISHI SERVO MOTOR HA-43-S

Brand  MITSUBISHI MELSEC-Q PARTS (QA1S65B)

Brand  MITSUBISHI MELSEC (PART# AD75P2-S3)

Brand  XILINX Virtex XCV1000E-6FG680C (12pcs Lot)

Brand  MITSUBISHI Keyboard Switch (Part # KS-MB975B)

Brand  MITSUBISHI Circuit Board ( RK432A )

MITSUBISHI MELSEC PROGRAMMABLE CONTROLLER (PART# A61RP)

 MITSUBISHI MELSEC RS-232-C (PART# A1SJ71QC24-R2)

Brand  MITSUBISHI PANEL (Part # FCUA-KB30)

Brand  MITSUBISHI MELSEC-Q PARTS (QA1S33B)

Brand  MITSUBISHI MELSEC FL-NET I/F UNIT (Part Numbe

Brand  MITSUBISHI MELSEC (PART#A1SJ72BR15)

Brand  Mitsubishi circuit board ( QX533A)

Brand  MITSUBISHI PANEL (PART# MB491A-2)

Brand  MITSUBISHI power supply unit ADU40A

Brand  MITSUBISHI ETHERNET I/F UNIT (A1SJ71QE71-B2)

Brand  MITSUBISHI Circuit Board ( RK481-37)

Brand  MITSUBISHI CONTROLLER MELSEC-Q (QA1S35B)

Brand  MITSUBISHI CONTROLLER MELSEC-Q (QA1S38B)

Brand  MITSUBISHI MELSEC (PART# QD51)

Brand  MITSUBISHI MELSEC UNIT (AI61)

Brand  SANYO Card number POA-MD04VGA

Brand  Static Control Systems UFB15 with CD driver

Brand  MITSUBISHI MELSEC INPUT UNIT (PART# AX11C)

MITSUBISHI MELSEC PROGRAMMABLE CONTROLLER (PART# AY80)

 MITSUBISHI MELSEC NET/10 NETWORK UNIT (A1SJ72QBR15)

Rietschle VTE 3 Vacuum Pump WB 63/2-30 STP (Type: VTE 3

MITSUBISHI MELSEC PROGRAMMABLE CONTROLLER (PART# AY11E)

MITSUBISHI MELSEC PROGRAMMABLE CONTROLLER (PART# AX80)

 MITSUBISHI MELSEC INPUT/OUTPUT (AJ65SBTCF1-32DT)

Brand  MITSUBISHI Remote I/O unit FCUA-DX100

Brand  MITSUBISHI MELSEC OUTPUT UNIT (AJ65FBTA2-16T)

MITSUBISHI MELSEC PROGRAMMABLE CONTROLLER (PART# AX82)

Brand  MITSUBISHI MELSEC SYSTEM UNIT (PART# A1SS91)

Brand  MITSUBISHI MELSEC UNIT (PART# AY10A)

 MITSUBISHI MELSEC PROGRAMMABLE CONTROLLER(AX41-S1)

Brand  MITSUBISHI MELSEC CONTROLLER (PART# AX71)

Brand  Freescale MPC8264AZUPIBB (21pcs Lot, TBGA)

Brand  MITSUBISHI MELSEC UNIT (PART# AX42-S1)

MITSUBISHI MELSEC PROGRAMMABLE CONTROLLER (PART# AY60)

Brand  MITSUBISHI MELSEC (PART# AOJ2-E28AR)

Brand  MITSUBISHI MELSEC (PART# A1SJ71QC24)

Brand  MITSUBISHI MELSEC UNIT (A1S62RD4)

 MITSUBISHI SWTICH (Part # TM55DZ-H) a pack of 6pcs

Yaskawa Minertia SERVO MOTOR UGRMEM-04MSU24

Brand  MITSUBISHI inverter FR-A520-0.4K

Brand  MITSUBISHI pickup unit ARST4XB-11

Philips PM 5539 TV Color Analyzer

Brand  MITSUBISHI I/O MODULE AJ65SBTW4-16DT

Brand  MITSUBISHI BATTERY UNIT (Part # FCUA-BT-4)

MITSUBISHI MELSEC PROGRAMMABLE CONTROLLER (PART# AX20)

 MITSUBISHI MELSEC IO LINK REMOTE UNIT (AJ55TB2-16R)

Brand  MITSUBISHI MELSEC (PART# A3NMCA-8)

Brand  MITSUBISHI MELSEC OUTPUT UNIT(PART3# A1SY18A)

Brand  MITSUBISHI regeneration unit (MR-RB50)

Brand  MITSUBISHI MELSEC UNIT (AJ65SBTCF1-32D)

Yaskawa Minertia SERVO MOTOR UGRMEM-01SSU22

MITSUBISHI MELSEC CABLE(PART# AC30B)

Brand  MITSUBISHI MELSEC (PART# AY11A)

GRE VHF-FM Marine Radio ephone MR2001

 MITSUBISHI ELECTRIC OPTION (PART#MRS120W60-1.5K)

MITSUBISHI MELSEC CABLE(PART# AC30R4)

Brand  MITSUBISHI MELSEC INPUT UNIT (AJ65BTC1-32D)