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廈門岳航計算機(jī)工程有限公司
聯(lián)系人：李素云
企業(yè)QQ：2851195446，2851195466
手機(jī)：18965423501
座機(jī)：0592-516550
(1)直流系統(tǒng)正極接地的危害
當(dāng)發(fā)生直流正極接地時，可能會引起保護(hù)及自動裝置誤動。因為一般斷路器的跳合閘線圈以及繼電器線圈是與負(fù)極電源接通的，如果在這些回路上再發(fā)生另一點直流接地，就可能引起誤動作。
New GE PCB Board Power Supply Monitoring 7556D17G1 D-4011J98-1 D4011J981 CCAB
Rebuilt SCR Pre-Charge Board PCB 308689-Q02 813.49.40A GD.721.02.00-D GX B-V0A
Used GE Lan I/O Terminal Board 531X307LTBAKG1 F31X307LTBA 0025 003/04 008/03 PCB
Used ABB Power Supply Board PCB ABB 851847 SAFT 132 CBS 57411619 DB 940615
New ABB PCB Board 3BSC980050R62 3HAC023447-001 TMRO
Philips PCB 5107-200-33062 FOR PARTS ONLY
Used DynaGen ABM100-12VDC
Used Siemens PLC And Expansion Module 1P 6ES7 223-1PL22-0XA0 223-1HF22-0XA0
Used Schneider Electric InterBus Communication Adapter 170INT11000 170ADI35000
New Allen-Bradley Interface Adapter ControlNET 20-COMM-C
Used Furon PLC Programmable Controller
Used Sysmac C40H Programmable Controller C40H-C6DR-DE-V1 PLC 24VDC 20W 2A
RBLT Allen Bradley 1772-LXP D Mini PLC-2/16 Processor
New Allen-Bradley 4 Slot Rack For Programmable Logic Controller 1746-A4 1746A4
New Beijers IFC 50 Interface Module for Mitsubishi Melsec PLC W9806
New Allen-Bradley 1771-0D Isolated AC Output Module Series C PLC 120V 225MA@5VDC
New AB Allen-Bradley SLC 500 Digital Input Module 1746-IA8 SER. A 115 VAC
Used Allen Bradley 7 Slot w/ CPU Power Supply SLC 500 CAT: 1746-P2 SER: C
Used Siemens Simatic S7 Central Processing Unit CPU PLC 6ES7 151-1CA00-3BL0
AO820
AO845
AOT-150
APSAF03
AV02
AV31
AV43
AW02
AW05
B-5MPBC
BRC-100
BRC300
BRC400
CI520V1
CI522
CI522A
CI526
CI532V02
CI532V04
CI540
CI560
CI570
CI627
CI801
CI810B
CI810V1
CI820
CI820-1
CI820-2
CI820V1
CI830
CI840
CI840A
CIC01
CLC01
CLC03
CLC04
CS512
CS513K02
CSC01
CT370a
CTT01
CTT02
DAI01
DAI04
DAI05
DAO01
DC371a
DCO01
DCP02
DCP10
Used Siemens PLC Chassis with 505-4515 5054515 and 505-6504 5056504
Used Allen Bradley SLC 500 10-Slot Rack 1746-A10 Ser B w/ 32k Memory 1746-P2
Used Mitsubishi Melservo AC Servo Driver MR-J2S-20CP 200W
Used Allen-Bradley SLC 500 7 Slot Rack PLC 1746-A7 w/ 2 Input Modules and 1 Proc
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