1794-APB
1794-APB
1794-APB
（ 3 ）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***电磁干扰的影响，又能***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。例如电缆屏蔽层必须一点接地，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，当发生异常状态如雷击时，地线电流将更大。
此外，屏蔽层、接地线和大地有可能构成闭合环路，在变化磁场的作用下，屏蔽层内有会出现感应电流，通过屏蔽层与芯线之间的耦合，干扰信号回路。若系统地与其它接地处理混乱，所产生的地环流就可能在地线上产生不等电位分布，影响 PLC 内逻辑电路和模拟电路的正常工作。 PLC 工作的逻辑电压干扰容限较低，逻辑地电位的分布干扰容易影响 PLC 的逻辑运算和数据存贮，造成数据混乱、程序跑飞或死机。模拟地电位的分布将导致测量精度下降，引起对信号测控的严重失真和误动作。
◆ 企业名称：厦门泰尼电气有限公司
◆ 主营业务：DCS,PLC
◆ 经营模式： 贸易
◆ 贸易地区： ***
◆ 联系人： 小黄《女士》
◆ 电话：0592-6809319
◆手机：18950191386
◆ ***:2917675397
◆ 传真：0592-6890859 （备注“01006”收）
◆ E-mail： 2917675397@***.com
TYLAN GENERAL ADAPTORR AC2 27-053667-
Tylan FC-260 MFC, H2, O2, HCl, Cl2, WF6
Tylan FC-280S MFC Mass Flow Control 150 SCCM FC280S***
TYLAN FC-280S*** NSFP FC280S***
Tylan FC-261 N2, H2, O2
Tylan, Mach One + System controller
LAM Research Tylan Micro CVD Control PCB 118730-001 New
VALVE CONTROLLER TYLAN AdapTorr AC-2S06 - REFURBISHED
TYLAN FC-127V NSPP FC127V
TYLAN AC-2S12 NSPP AC2S12
AMAT KIT ARGON BLEED TYLAN MFC 9240-05184ITL
TYLAN GENERAL, MDVX-100B, motor driven throttle valve
TYLAN FC-3926V NSFP FC3926V
TYLAN FM-3921V NSFP FM3921V
TYLAN FM-3926V NSFP FM3926V
Tylan 2950 MFC Lot FC-2950MEP5-4V untested 500sccm
AMAT KIT ARGON BLEED TYLAN MFC 9240-03580ITL
Tylan 2900 MFC FC-2900M, CF4, He, CF4, CL2, lot's of 4
Tylan MFC FC-280, PC-580, N2O,N2,NH3,HE lots of 4
Tylan General CMLA-11S02 10 Torr Manometer Lam 4520
TYLAN FC-125KZ USPP FC125KZ
TYLAN FM-225KZ USPP ***25KZ
Tylan / Millipore FC-2960M Mass Flow Controller NEW
Tylan General CMLA-21 0-100 Torr Manometer with Cert.
TYLAN MICRO CVD CONTROL BD 118730-008
TYLAN GENERAL, ADAPTORR MODEL AC-2
TYLAN 2979M Mass Flow Controller FC-2979MEP5-WM, Gas O2
TYLAN 2900M series MFC lots of 3, and TN2900 MFC, USED
TYLAN FC-260 NSFP FC260
TYLAN FC-260-5000SCCM-02 USPP FC2605000SCCM02
TYLAN FC-261-25SLPM-N2 USPP FC26125SLPMN2
TYLAN FC-260-500SCCM-N2 USPP FC260500SCCMN2
TYLAN FC-260 NSPP FC260
Tylan Mass Flow Controller FC-280*** N2 5SLPM 50PSIG NIB
Tylan Mass Flow Controller FC-261V AIR 2000 SCCM (NIB)
TYLAN GENERAL, ADAPTORR MODEL AC-4, Millipore AC-4S02
TYLAN GENERAL, ADAPTORR MODEL AC-4, Millipore AC-4
Tylan 2950 MFC Lot FC-2950MEP5-4V untested 10sccm
New Tylan FC-260 CO2 Mass Flow Controller 10 SCCM
New Tylan FC-260 CCL4 Mass Flow Controller 50 SCCM
New Tylan FC-260 O2 Mass Flow Controller 500 SCCM
TYLAN FC-260 USPP FC260
TYLAN FC-260-25SCCM-02 USPP FC26025SCCM02
TYLAN FC-260KZ NSPP FC260KZ
VACUUM MANOMETER TYLAN CMLA-11S02 (10 Torr)
VACUUM MANOMETER TYLAN CMLB-21 (100 Torr) - REFURBISHED
TYLAN GENERAL CDL-21S06-EMC 0-100 T0RR RANGE, lots of 3
Tylan 2950 MFC FC-2952M 4V metal, Co, CHF4, lot's of 2
TYLAN FC-260-150SCCM-N2 USPP FC260150SCCMN2
Tylan 2950 FC-2950MEP5 MFC Lot 500sccm untested
3 Mass Flow Meter Tylan FM-360, Argon and Air, untested
Tylan General CMLA-21 100 TORR CAPACITANCE GAUGE
Tylan 2900 MFC FC-2900M-EP, N2, 20 SLPM, lot's of 2
Tylan 2900 MFC FC-2900M-EP, O2, 20 SLPM, lot's of 2
Tylan FM-360 Mass Flow Controller MFC FM360 500PSIG NEW
TYLAN FC-260-1SLM-02 USPP FC2601SLM02
TYLAN FC-261-10SLPM-N2 USPP FC26110SLPMN2
TYLAN FC-260-4SLM-H2 USPP FC2604SLMH2
New Tylan FC-550 SIH4 Mass Flow Controller
Tylan General CMS-11S02, 0-10 TORR, lots of 2
TYLAN FC-261-10SLPM-02 USPP FC26110SLPM02
TYLAN FC-261-10SLM-N2 USPP FC26110SLMN2
LAM Research Millipore/Tylan MFC VC-4900VRH Refurbished
Tylan FC-261 MFC Mass Flow Controller NH3 5SLM refurb
Tylan 2950 Series MFC Lot FC-2950MEP5-4V untested
Tylan 2950 MFC Lot FC-2950MEP5 untested 500sccm
Tylan 2900 MFC FC-2900M-EP, Ar 20 SLPM lots of 2 used
LAM Research Millipore/Tylan MFC VC-4900VRH - new
Tylan 2902 VT Mass Flow Controller H2 10 SLP
Tylan source VI vaporizer controller 10 SLPM H2
Tylan source VI vaporizer controller SICL4 20GR/mn
Tylan General CMLA-21 Pressure Sensor 0-100 TORR
Tylan FC 202 Mass Flow Control and Power Supply- LED
Tylan FC-202 Mass Flow Control - Power Supply & Filter
Tylan Corp. Mass Flow Controller Model FC-260
TYLAN FC-261-4SLPM-H2 USPP FC2614SLPMH2
Tylan General 4 Chamber Controller (w/ watlow 965)- NEW
Tylan Mass Flow Controller FC-280SAKZ N2 Model FC-280S
Tylan 2900 Series Mass Flow Controller FC-2950M-EP
Tylan 2900 Series Mass Flow Controller FC-2900MEP HCL
NEW TYLAN SOURCE V VAPORIZER CONTROLLER 5 SLPM H2 10GR/
TYLAN FC-261-4SLM-H2 USPP FC2614SLMH2
Tylan Mass Flow Control and Power Supply- FC 202
Tylan General FC-260 MFC 500 cc N2 nitrogen Millipore
One-day shipping ***ailable
MASS FLOW CONTROLLER TYLAN FC260 Gas:SiH4/N2 Range:6SLM
MASS FLOW CONTROLLER TYLAN FC-261 Gas:N2 Range:7SLM
MASS FLOW CONTROLLER TYLAN FC280 Gas:H2 Range:100Sccm
MASS FLOW CONTROLLER TYLAN FC280 Gas:H2 Range:3SLM
MASS FLOW CONTROLLER TYLAN FC-261 Gas:O2 Range:15SLM
MASS FLOW CONTROLLER TYLAN FC280 Gas:H2 Range:300Sccm
MASS FLOW CONTROLLER TYLAN FC2900M Gas:He Range:20Sccm
2 used Tylan FC-260 MFC, N2 100 SCCM, 4 SLPM
TYLAN FM-360 USPP FM360
Tylan / Millipore: MDVX-100BS01 Body Throttle Valve
Tylan DFS-80 Digital Flow Standard Qty 10
Tylan Millipore FC-2900V 2SLPM N2 NEW
Tylan VC-4900VRH 500SCCM Gas: H2O vapor LAM 797-92438
Tylan VC-4900VRH 500sccm H2O Vapor remote electronics
2 MFC Tylan FC-260, 20% HCL/N2 500 SCCM