霍尼韦尔 CC-PAOH01系统备件
¥888.00
HONEYWELL CC-PAOH01系统备件
¥888.00
霍尼韦尔 CC-PDIL01系统备件
¥888.00
HONEYWELL CC-PDIL01系统备件
¥888.00
霍尼韦尔 CC-PDOB01系统备件
¥888.00
HONEYWELL CC-PDOB01系统备件
¥888.00
HONEYWELL CC-PAIH01
现场电磁干扰是PLC控制系统中最常见也是最易影响系统可靠性的因素之一，所谓治标先治本，找出问题所在，才能提出解决问题的办法。因此必须知道现场干扰的源头。（1）干扰源及一般分类
影响PLC控制系统的干扰源，大都产生在电流或电压剧烈变化的部位，其原因是电流改变产生磁场，对设备产生电磁辐射；磁场改变产生电流，电磁高速产生电磁波。通常电磁干扰按干扰模式不同，分为共模干扰和差模干扰。共模干扰是信号对地的电位差，主要由电网串入、地电位差及空间电磁辐射在信号线上感应的共态（同方向）电压叠加所形成。共模电压通过不对称电路可转换成差模电压，直接影响测控信号，造成元器件损坏（这就是一些系统I/O模件损坏率较高的主要原因），这种共模干扰可为直流，亦可为交流。差模干扰是指作用于信号两极间的干扰电压，主要由空间电磁场在信号间耦合感应及由不平衡电路转换共模干扰所形成的电压，这种干扰叠加在信号上，直接影响测量与控制精度。
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Allied Telesyn (AT-FS716-10) Networking Switch
Allied Telesyn AT-FS708 Base 10/100 8-Port Ethernet Switch Hub
Allied Telesyn 5-port AT-FS705LE Ethernet Switch
Low Profile Allied Telesyn Fiber ST and Copper PCI Network Card AT-2451FTX XH044
Allied Telesyn AT-FS202 Fast Ethernet Switch.
Desktop PCI Network Adapter PC Allied Telesyn AT-2700FTX
Allied Telesyn AT-FS716 16 Port Ethernet Switch Module Rack Mount
Allied Telesyn AT-MC101 Fast Ethernet Media Converter 100BaseTX to 100BaseFX
AT-RP48I-EMC-20 ALLIED TELESYN EMC CUBE SWITCH
Allied Telesyn - AT-FS724i - 10/100 - 24 Port Fast Ethernet Switch
ALLIED TELESYN - MC13 Ethernet Media Converter Model AT-MT13 Used with Power
Allied Telesyn CentreCOM MX10 IEEE802.3 MicroTransceiver 10 BASE 2 AT-MX10C
Allied Telesyn 8 Port Fast Ethernet Switch AT-FS708
Router Allied Telesyn AT AR220E Fast Ethernet 100Mbps Firewall
Allied Telesyn Centrecom 210T AT-210T
Allied Telesyn AT-3124TR
Lot of 2 Allied Telesyn AT-FS724i 10/100 Fast Ethernet Switches Inc Power Cords
Lot of 2 Allied Telesyn Ethernet Card PCI AT-2450FTX
ATI Allied Telesyn AT-MC101XL Fast Ethernet Media Converter Supplied without PSU
ATI Allied Telesyn AT-FS708 8-Port Fast Ethernet Switch with Brackets
Allied Telesyn - AT-FS718 - 10/100 - 16 Port Fast Ethernet Switch
Allied Telesyn AT-2451FTX-SC PCI 10MBPS FIBRE SC Interne Netzwerkkarte
Newly ListedNetzwerkswitch Allied Telesyn AT-FS705EFC/SC aus Beh?rdenbestand
Allied Telesyn AT-MX10S Microtransceiver LAN Adapter BNC AUI IEEE 802.3
ALLIED TELESYN 8-PORT ETHERNET SWITCH (AT-FS708LE)
Allied Telesyn Netzwerkkarte AT-2560FX 100Mbps PCI *NEUWERTIG & OVP* 400m-2km!
Allied Telesyn AT-FS724I 24-Ports 10/100 Switch
ALLIED TELYSYN AT-8326GB - 24 Port + 2 Gigabit Fast Ethernet Switch
Allied Telesyn AT-AR410 Modular Branch Office Router
AT-MC13 Allied Telesyn Media Converter - VAT & Carriage Included
Allied Telesyn AT-FS724I Standalone Switch 24 Port 100Mbps No Bracket Grade C
Allied Telesyn CentreCOM Transceiver AT-210TS
Allied Telesyn 100-560-571 AT-8948A-EMC fast ethernet L3+ switch
Allied Telesyn AT-FS724I 24-Ports 10/100 Switch
Allied Telesyn Fast Ethernet Switch AT-FS202?
Allied Telesyn Centrecom AT-3024SL
Allied Telesyn Transceiver -Twisted pair AT-210T
Allied Telesyn Centrecom AT-3024SL 24 Ports Hub
Allied Telesyn MC14 Ethernet Media Converter AT-MC14 Works Great
Allied Telesyn AT-A65 Stacking Kit for the 8500 series switches
Allied Telesyn AT-RP48I-EMC-20 Rapier Layer 3 Fast Ethernet Switch (2) AT-A39/T
DIGI MIL-140 Transition E-TBT-FRL-03, Allied Telesyn International AT-MC13
Newly Listed~~Brand New~~Allied Telesis / Allied Telesyn AT-FS708-10 Switch~~8-Port~~
Allied Telesyn AT-FS716L 16-Port Unmanaged Fast Ethernet Switch
ALLIED TELESYN CENTRE-COM AT-210TS Ethernet Transceiver IEEE 802.3 10 BaseT MAU
ALLIED TELESYN AT-3024SL CENTRECOM MULTIPORT REPEATER 24 PORT TESTED
ATI Allied Telesyn AT-FS705L 5-Port Fast Ethernet Switch
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