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PHOENIX QUINT PS-100-240AC/24DC/10
PHOENIX QUINT PS-100-240AC/24DC/10
PHOENIX QUINT PS-100-240AC/24DC/10
1、信号隔离器发展历史
信号隔离器诞生缘于工业现场噪声和高低频脉冲信号干扰的滤除和对控制系统的隔离保护，以保证信号输出的准确、稳定和可靠，后来信号变送和提高负载能力的设计也增加进来。
初期，信号采集都是采用变压器隔离方式，它的特点是：性能稳定，寿命长，精度较高，带负载能力强，隔离强度高，但电路复杂，制作工艺要求更高。随着电子技术的发展，近些年来逐渐出现了利用光耦合器（optical coupler）生产的光电式隔离器，它的特点是：性能稳定，抗干扰能力强，而且线路简单，成本低廉，但相对于变压器隔离方式寿命略短、精度略低。在一些现场干扰较大，工艺要求较高场合出现了变压器与光电联合方式的信号隔离器，它的隔离能力、抗无线射频和电磁干扰能力更强。
从功能的角度来看，信号隔离器也不局限于原有的模拟量信号隔离、滤波的功能，随着自动化技术和传感器技术的发展，根据不同原理设计的传感产品越来越多，非标准的信号转换成标准信号的需求也越来越多，所以，信号隔离变送器是其恰当的产品描述。
2、信号隔离变送器发展现状
随着产品技术和市场应用越来越成熟，市场越来越大，隔离器生产厂家越来越多，特别是国产品牌日益增多，这些厂家不管是自己研发还是贴牌，都在市场中拥有一席之地，有的市场营销做的风生水起，但大多国内企业还仅限于能够生产制造信号隔离变送器，在生产工艺控制、生产流程、质量控制等方面还有不足，对于产品使用的设计、外观设计等没有形成自己的特点和创新。
PHOENIX QUINT PS-100-240AC/24DC/10
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NI PXI-5421 187872F-01
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*NEW* National Instruments PXI-2596
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National Instruments 745749-01 PXI-1002
National Instruments 763061-01
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NATIONAL INSTRUMENTS 776515-02
National Instruments ASSY181830E-01
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National Instruments SCXI-1000
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NATIONAL INSTRUMENTS 183064B-01
NATIONAL INSTRUMENTS PXI-8420/8
NATIONAL INSTRUMENTS PXI-8335 MXI-3
NATIONAL INSTRUMENTS PXI-6508
National Instruments PXI-1042 PXI-8187 PXI-6602 PXI-6704 PXI-6025E
National Instruments MXI-3 PXI-8335
National Instruments FP-TB-1 184106C-01
National Instruments USB-485/2
National Instruments PCI-6503
NI National Instruments 184683E-02 PCI-232/485.4CH
NI NATIONAL INSTRUMENTS GPIB-232CV-A
National Instruments PXI-6123
National Instruments PCI 232
National Instruments SCXI-1315 186963A-01
National Instruments 763061-02
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National Instruments AT-MIO-16XE-50
National Instruments SCXI-1304
National Instruments SCXI-1327
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SERBIA 2014 Europa National Musical Instruments set MNH
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National Instruments ASSY181830E-01
NATIONAL INSTRUMENTS PCI-DIO-96
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National Instruments PXI-8105
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NATIONAL INSTRUMENTS PCI-8432/4
SCXI-1124 Module and SCXI-1325
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[National Instrument] FP-1001
National Instruments CFP-2120
National Instruments SCXI-1315 186963A-01
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Malta FDC First Day Cover Europa 2014 National Musical Instruments 9th May 2014
NATIONAL INSTRUMENTS PCI-6534 187142F-01
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ALBANIA - Europa 2014 "National musical instruments" - Booklet
191 MONTENEGRO 2014 - Europa Cept - National Music Instruments - MNH Set
National instruments PCI-6534 & 186612B-02
National Instruments PCI-6034E 187576C-01
National Instruments PCI-6034E 187576B-01
National Instruments 763507B-0R5
NATIONAL INSTRUMENTS AT-GPIB/TNT
NI PXI-5421 187872F-01
National Instruments IMAQ-BNC-1 183882-02
National Instruments 181641-02
National Instrument 5102
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NATIONAL INSTRUMENTS FP-TB-1 D327841
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