信號隔離器工作原理

首先將PLC接受的信號，通過半導(dǎo)體器件調(diào)制變換，然后通過光感或磁感器件進行隔離轉(zhuǎn)換，然后再進行解調(diào)變換回隔離前原信號或不同信號，同時對隔離后信號的供電電源進行隔離處理。保證變換后的信號、電源、地之間絕對獨立。

現(xiàn)在市場有那么多品牌的隔離器，價格參差不齊，該怎么選擇呢？

? ? 隔離器位于二個系統(tǒng)通道之間，所以選擇隔離器首先要確定輸入輸出功能，同時要使隔離器輸入輸出模式（電壓型、電流型、環(huán)路供電型等）適應(yīng)前后端通道接口模式，此外尚有精度、功耗、噪音、絕緣強度、總線通訊等許多重要參數(shù)涉及產(chǎn)品性能，例如：噪音與精度有關(guān)、功耗能量與可靠性有關(guān)，這些需要使用者慎選?？傊囉?、可靠、產(chǎn)品性價比是選擇隔離器的主要原則。

? ?工作原理：首先將半導(dǎo)體器件調(diào)制變換，然后通過光感或磁感器進行隔離轉(zhuǎn)換，然后再進行解調(diào)回隔離前原信號，同時對隔離后信號的供電電源進行隔離處理，保證變換后信號的供電電源進行隔離處理。保證變換后的信號、電源、地之間絕對獨立。

一：保護下級的控制回路。

二：消弱環(huán)境噪聲對測試電路的影響。

三：抑制公共接地、變頻器、電磁閥PLC/DCS輸入輸出及通訊接口的忠實防護。

標準系列導(dǎo)軌結(jié)構(gòu)，易于安裝，可有效的隔離；輸入、輸出和電磁閥及大地之間的電位，能克服變頻器噪聲級各種高低頻脈動干擾。?

ABB Circuit Breaker, # S263-D6

ASEA Heavy Duty Contactor, EH 22-22

ABB Circuit Board DSQC 223, EEAB P/N 56 01-03, Rev 005,...

ABB BC6-30-01-1.4 Mini Contactor, 24V DC Coil, 12A A, 6...

ABB Contactor B6-30-10, 12A, 300VAC, 115V Coil, Used, ...

ABB Manual Starter, M25-TM-4

ABB Circuit Breaker S203 C 2

ABB Contactor KC31E 24VDC Coil, 10 A, 600V, Used, WARRA...

ABB Robotics 8 Slot Chasis Casing, 3HAB 1093-14, USED, ...

5-New ABB IFO Electric Fuses, SK 616 0039, 10 Amp, 500V...

ABB Circuit Breaker S222 K10A

ABB 20A Circuit Breaker, UXAB 727131 R 103, Type ES, US...

ABB Auxiliary Contact Block, CA7-22K

ABB Circuit Breaker, # S261-B6

ABB Circuit Breaker, S262-D1

NEW ABB Circuit Breaker S271-K4, 4A, 277 V, WARRANTY

ABB Circuit Breaker S271-K6A

ABB White Illuminated Push Button, W/Contacts, SK 616 0...

ABB Circuit Breaker, # S271-K6

ABB Circuit Breaker, # S271-K1

ABB Circuit Breaker, # S271-K4, 4A

ABB Circuit Breaker, # S271-K16A

ABB Circuit Breaker, # S271-K2A

ABB Circuit Breaker, # S271-K2

2 - Banner Units, 1 - MSE824, 1 - MSR824 Mini Screen Em...

Banner Mini-Screen Light Curtain Receiver, MSE4824, Use...

Banner Micro-Screen Light Curtain Emitter, USE2824YP2

Banner Micro-Screen Light Curtain Emitter, USE2424YP2, ...

NEW Banner Engineering Fiber Optic Cable, # IAT251S, Ne...

Banner EZ Light, Operator Indicator, K50LGRXPQ, Used, W...

Banner Mini-Beam Photoelectric Sensor, # SM2A312D, Use...

Banner Sensor, Q45VR3F

Banner IA153SMTA Fiber Optic Cable

Banner Maxi-Beam Scanner Head Emitter, RSBE, WARRANTY

NEW Banner Multi-Beam Scanner Block, Type SBLX1, NIB, W...

Banner Sensor, QS30VR3FF400QPM?A16

Banner Valu-Beam, Photoelectric Sensor, SM2A912DQD, Use...

Banner Barrell Sensor, SP12SELQD

Banner PVA100P6EQ PVA Series Light Screen Emitter, Used...

Banner Photoelectric Sensor, Q45VR2LPQ

Banner Fiber Optic Cable, # ITETA153S

Banner STBVR81Q6 Self Checking Touch Button, 51127 Cord...

Banner Multi-Beam Logic Module, Type FX1, Used, WARRANT...

Banner Multi-Beam Logic Module, Type F1 A LM3, Used, WA...

BANNER Valu-Beam, Photoelectric Sensor, SM2A912FQD, Use...

Banner Photoelectric Eye Sensor, Q45BB6FQ, Used, WARRAN...

Banner Photoelectric Eye Sensor, Q45BW22LPQ, Used, WARR...

BANNER VALU-BEAM Photoelectric Sensor SM2A912DSRQD, Use...

Sprecher + Schuh Supply Block, KT3-25-DB-54-5, 65 Amp, ...

Sprecher + Schuh Supply Block, KT3-25-DB-45-5, 65 Amp, ...

Banner Fiber Optic Cable, # IAT23S

Banner Multi-Beam Scanner Block, Type DX1, Used, WARRAN...

Banner Emitter Sensor, Q452EQ

Banner Mini-Beam Sensor, SM2A1312FPQD,?

Banner Maxi-Amp Amplifier Module Relay, CD3RA, Used, Wa...

Banner Multi-Beam Scanner Block, F1

NEW Banner Multi-Beam Scanner Block, Type 2SBF1, WARRAN...

Banner Maxi-Amp Amplifier Module Relay, CM5RA, Used, Wa...

Banner Multi-Beam Scanner Block, 2F1, 250 VAC, Used, W...

Banner Omni Beam Sensor Head, OSBLV, WARRANTY

Sprecher + Schuh Supply Block, KT3-25-A3, 63 Amp, USED,...

Banner Fiber Optic Sensor w/ Head, # OPBP2QDH, Used, WA...

NEW Banner Multi-Beam Reflector, # 71791, WARRANTY

Banner T18 Series T186EQ EZ-BEAM Photoelectric Sensor, ...

Banner T18 Series T18SP6RQ EZ-BEAM Photoelectric Sensor...

Banner Power Block, OPBA2

Cincinnati Milacron 850 Control Main Board, 3-533-0723G...

Cincinnati Milacron Acramatic 850 Color CRT, 3-424-1974...

Cincinnati Milacron 1 FT5072-0AF01-0-?Z Permanent Magnet...

Cincinnati Milacron 3-533-0907G PC Board Module, Acrama...

Cincinnati Test Systems Sentinel Pressure Decay Instrum...

Cincinnati Acramatic Circuit Board, 3-542-1015A, 354210...

Cincinnati Milacron SAM Circuit Board, 3 531 3984A, USE...

Cincinnati Acramatic 850SX Power Supply 3-424-2037A Rev...

Cincinnati Milacron GRAP Circuit Board, 3 531 4094A, US...

Cincinnati Acramatic Circuit Board, 3-533-0908G, 353309...

Cincinnati Milacron Board, # 3 531 3569A, USED, WARRANT...

Cincinnati Milacron Circuit Board, # 3-531-4043A, 3-533...

Cincinnati Milacron PC Board, # 3 531 3908A, Revision B...

D1S BD2 Circuit Board PCB D1SBD2 851228 851361, USED, ...

Cincinnati Milacron Logic Board, # 3-531-4205A, Used, W...

Cincinnati Milacron PC Board, # 3 531-3749A, 3-533-0098...

Cincinnati Milacron PCB Board, # 3-531-3939A, Used, WAR...

Cincinnati Milacron Battery Backup Board, # 3 531 4066A...

Cincinnati Milacron PC Board, # 3 531 4132A, 3-531-4238...

Cincinnati Milacron PC Board, # 3 531 4132A, 3-531-4148...

Cincinnati Milacron PC Board, # 3 531 4132A, Used, WARR...

Cincinnati Milacron Circuit Board, # 3-533-0724G, Used,...

Cincinnati Milacron Circuit Board, # 3-533-0734G, Used,...

Cincinnati Milacron Circuit Board, 3-533-0725G, USED, W...

Cincinnati Milacron Board, 35313908A, & 20 Slot Card Ca...

Cincinnati Acramatic 850SX Control Rack 3-424-2030A, US...

Cincinnati Milacron PC Board, # 3-531-3650A, 3 533 0040...

Cincinnati Milacron PC Board, # 3-531-3694A, Used, Warr...

Cincinnati Milacron Relay Board, # 3-531-3353A,Use?d, WA...

Cincinnati Acramatic Base Board 3-531-3849A & 16 Slot R...