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上架日期： 2017年10月18日瀏覽量： 250次

PSM-125 Reliance Electric (*￣︶￣)

產品價格：￥2552（人民幣）

規格：PSM-125

發貨地：廈門

品牌：

最小起訂量：1個

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廈門興銳嘉進出口有限公司

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認證類型：企業認證

企業證件：通過認證

認證信息：廈門興銳嘉進出口有限公司

商鋪名稱：廈門興銳嘉進出口有限公司

聯系人：劉錦玉（小姐）

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企業郵箱：3005393110@qq.com

聯系地址：廈門市思明區呂嶺路1733號創想中心20樓

郵編：361000

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商品詳情

聯系人：劉錦玲銷售經理
熱線：0592-5361112
手機：15359273791
微信：15359273791
工作QQ: 2589249356
郵箱：2851759119@qq.com

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產品名稱：PSM-125 Reliance Electric DCS 系統模塊

產品型號：PSM-125 Reliance Electric

產品參數：PSM-125 Reliance Electric

產品功能：PSM-125 Reliance Electric

1概述

光耦(opticalcoupler)亦稱光電隔絕器、光耦合器或光電耦合器。它是以光為前言來傳輸電信號的器件，一般把發光器(紅外線發光二極管LED)與受光器(光敏半導體管)封裝在同一管殼內。當輸入端加電信號時發光二極管宣告光線，光敏三極管接受光線之后就發作光電流，從輸出端流出，然后完結了“電—光—電”變換。典型運用電路如下圖1-1所示。

光耦的首要利益是：信號單向傳輸，輸入端與輸出端完全完結了前端與負載完全的電氣隔絕，輸出信號對輸入端無影響，減小電路攪擾，簡化電路規劃，作業安穩，無觸點，運用壽命長，傳輸效率高。光耦合器是70年代發展起來的新型器件，現已廣泛用于電氣絕緣、電平變換、級間耦合、驅動電路、開關電路、斬波器、多諧振蕩器、信號隔絕、級間隔絕、脈沖擴展電路、數字外表、遠距離信號傳輸、脈沖擴展、固態繼電器(SSR)、儀器外表、通訊設備及微機接口中。在單片開關電源中，運用線性光耦合器可構成光耦反響電路，經過調度控制端電流來改動占空比，抵達精密穩壓目的。

2光耦典型電路

常用于反響的光耦類型有TLP521、PC817等。這兒以TLP521為例，介紹這類光耦的特性。圖2-1所示為光耦內部結構圖以及引腳圖。

TLP521的原邊相當于一個發光二極管，原邊電流If越大，光強越強，副邊三極管的電流Ic越大。副邊三極管電流Ic與原邊二極管電流If的比值稱為光耦的電流擴展系數，該系數隨溫度改動而改動，且受溫度影響較大。作反運用的光耦正是運用“原邊電流改動將導致副邊電流改動”來完結反響，因而在環境溫度改動劇烈的場合，因為擴展系數的溫漂比較大，應盡量不經過光耦完結反響。此外，運用這類光耦有必要留心規劃外圍參數，使其作業在比較寬的線性帶內，否則電路對工作參數的敏感度太強，不利于電路的安穩作業。

一般選擇TL431結合TLP521進行反響。這時，TL431的作業原理相當于一個內部基準為2.5 V的電壓過失擴展器（輸出的電壓進行過失擴展比較，然后將取樣電壓經過光電偶合器反響控制脈寬占空比，抵達安穩電壓的目的），所以在其1腳與3腳之間，要接補償網絡。

TL431是由德州儀器出產的可控精密穩壓源，什物如圖2-3所示。它的輸出電壓用兩個電阻就可以恣意的設置到從2.5V到36V范圍內的任何值。該器件的典型動態阻抗為0.2Ω，在許多運用中用它代替穩壓二極管，例如，數字電壓表，運放電路，可調壓電源，開關電源等。圖2-2所示為TL431引腳擺放與運用連線圖。

常見的光耦反響第1種接法。Vo為輸出電壓，Vd為芯片的供電電壓。com信號接芯片的過失擴展器輸出腳。留心左邊的地為輸出電壓地，右邊的地為芯片供電電壓地，兩者之間用光耦隔絕。圖2-3所示接法的作業原理如下：當輸出電壓升高時，TL431的1腳(相當于電壓過失擴展器的反向輸入端)電壓上升，3腳(相當于電壓過失擴展器的輸出腳) 電壓下降，光耦TLP521的原邊電流If增大，光耦的另一端輸出電流Ic增大，電阻R4上的電壓降增大，com引腳電壓下降，占空比減小，輸出電壓減��；反之，當輸出電壓下降時，調度進程類似。

高于反相端電位的方式，運用運放的一種特性—當運放輸出電流過大(超越運放電流輸出才干)時，運放的輸出電壓值將下降，輸出電流越大，輸出電壓下降越多。因而，選用這種接法的電路，一定要把PWM（脈沖寬度調制）芯片的過失擴展器的兩個輸入引腳接到固定電位上，且有必要是同向端電位高于反向端電位，使過失擴展器初始輸出電壓為高。圖2-3所示接法的作業原理是：當輸出電壓升高時，原邊電流If增大，輸出電流Ic增大，因為Ic現已超越了電壓過失擴展器的電流輸出才干，com腳電壓下降，占空比減小，輸出電壓減小；反之，當輸出電壓下降時，調度進程類似。

常見的第3種接法，如圖2-4所示。與第一種底子類似，不同之處在于多了一個電阻R6，該電阻的作用是對TL431額外注入一個電流，避免TL431因注入電流過小而不能正常作業。實際上如恰當選取電阻值R3，電阻R6可以省掉。調度進程底子上同1接法一起。

常見的第4種接法，如圖2-4所示。該接法與第2種接法類似，差異在于com端與光耦第4腳之間多接了一個電阻R4，其作用與第3種接法中的R6一起，其作業原理底子同接法2。

反響方法1、3適用于任何占空比（接通時間與周期之比）情況，而反響方法2、4比較適合于在占空比比較小的場合運用。

3、小結

開關電源的光耦首要是隔絕、供應反響信號和開關作用。開關電源電路中光耦的電源是從高頻變壓器次級電壓供應的，當輸出電壓低于穩壓管電壓是給信號光耦接通，加大占空比，使得輸出電壓升高；反之則關斷光耦減小占空比，使得輸出電壓下降。旦高頻變壓器次級負載超載或開關電路有毛病，就沒有光耦電源供應，光耦就控制著開關電路不能起振，然后保護開關管不至被擊穿焚毀。

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Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P43

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P61

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P62

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P64

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P69

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P43A

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P44A

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P44A

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P61A

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P62A

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P64A

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P69A

Fischer + Porter 53MC5212A25BA Controller 53MC5

FISCHER & PORTER 686B617U01 USPP 686B617U01

Fischer Porter 10E1205 Bull's Eye Sight Flow 820B002U18

FISCHER & PORTER 805H028U02 USPP 805H028U02

Fischer Porter 1340 Electronic uDCI Chart Recorder

Fischer & Porter FET AI MUX Board 685B731U02

Fischer Porter 10E1207 1" Iron Bull's Eye Sight Flow

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P20

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P20 B

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P21

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P22

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P23

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P24

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P24

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P25

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P25 B

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P25 C

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P26

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P28

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P28 B

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P32

Bailey Fischer Porter Flow Meter Model 10A2227A LOT

Fischer & Porter Flowmeter 10A2235 w/ 1-3/4" ports

BAILEY FISCHER PORTER CHART RECORDER 3 PEN 2345

Fischer Porter 390 Chart/Graph Recorder

Fischer Porter Ultrasonic Generator

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P12

Fischer Porter 50AS3212 (Flowmeter Signal Converter??)

Fischer Porter 10E1207 1/2" Iron Bull's Eye Sight Flow

FISCHER & PORTER 686B372U01 USPP 686B372U01

Fischer Porter Ultrasonic Generator 55UC2210A

FISCHER PORTER/ABB FLOMETER 0-3 GPM

FISCHER PORTER/ABB FLOMETER 0-0.6 GPM

FISCHER & PORTER 10A6131N NSPP 10A6131N

FISCHER & PORTER 10A6130 NSPP 10A6130

FISCHER & PORTER 50-PZ-1211 FLOWMETER SIGNAL CONVERTER

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P10

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P11

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P13

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P14

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P15

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P16

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P16 B

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P17

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P18

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P19

FISCHER & PORTER 10A6131NA1BXX NSPP 10A6131NA1BXX

FISCHER & PORTER 10A6131NB1B *NEW*
One-day shipping available

Fischer & Porter Co. Module 338D147U01

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P51

Fischer & Porter 10A3130 Purge Meter Rotameter 3135-P54

Fischer & Porter 10A3130 Purge Meter Rotameter A313512

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P51A

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P52A

Fischer Porter 10A3130 Purge Meter Rotameter 3135-P54A

Fischer Porter 10A3130 Purge Meter Rotameter 821A013U03

NEW FISCHER PORTER 300F257U03 GLASS METERING TUBE

Fischer Porter 10A6130 Flow Meter 250 PSIG Max
One-day shipping available

FISCHER & PORTER 10A6130 USPP 10A6130

Fischer Porter V. A Meter

Fischer Porter 53MC4211A1BB1 Digital Controller 53MC4

FISCHER & PORTER 685B606U01 USPP 685B606U01

FISCHER & PORTER 699B265U03 NSFP 699B265U03

Fischer And Porter 10A1755 Flowmeter USED Free Ship
One-day shipping available

NEW FISCHER & PORTER FORCE MOTOR PART # 669B009U07

FISCHER & PORTER 19AXA1DBS2D1B1M1X 1/4" FLOW METER

Fischer & Porter Co. FP Series Variable Area Flowmeter
One-day shipping available

Fischer Porter 17CA1010 Chlorine Detector Chloralert

FISCHER & PORTER ABB 10A500 Flowmeter 10L/Min, 1" 316SS

FISCHER & PORTER 10A1755 FLOWMETER 0-110 GPH LIQUID

Fischer & Porter Flow Meter Float Stop 304D069P31

FISCHER AND PORTER FLOW METER D10A6142N 0 TO 30

Fischer & Porter Force Motor 669B009U07

Fischer Porter FPLC Glass Columns? Lab Glass, Glassware

Fischer & Porter 53ML1000 Manual Loading Station NEW!

FISCHER & PORTER VERT ARATOR 500
One-day shipping available

Fischer Porter Flow Meter New 10A2235A Ratosight

Fischer & Porter Loop Board 40PB2011

Fischer Porter Vert Arator 500 mod.no.SA182F316 B2847

Fischer & Porter Flow Meter 8" Service Clamp

FISCHER & PORTER MOD 10A2227A SCALE
Expedited shipping available

FISCHER & PORTER RATO SIGHT METER 1/2" NPT GPM 614ER22

FISCHER & PORTER 609B431U08 NSFP 609B431U08

FISCHER PORTER 10D1419A MAG X FLOW TUBE, USED

Fischer & Porter MAG X Model 10D1419A Flowmeter S32

FISCHER PORTER R18805B2077/22B1 MAG. FLOWTUBE, USED

Fischer & Porter - 40PB200 - Digital Output Card

Lot 6 Fischer Porter/Brooks Flow Meter

Fischer and Porter Variable Area Flowmeter 10A1377M LOT

FISCHER AND PORTER RATIO SIGHT FLOW 10A2235A (NIB)

Fischer & Porter Flow Meter Tube 443U381U09

Fischer & Porter Flow Meter Tube 443U381U10

Fischer & Porter Flow Meter Tube 443U381U11

Fischer & Porter Flow Meter Tube 443U381U12

Fischer & Porter Flow Meter Tube 443U381U13

Fischer & Porter Flow Meter Tube 443U381U18

Fischer & Porter Flow Meter Tube FP-1/8-13.3-G-6

Bailey Fischer Porter Fluid Level Indicator 10E1205A

FISCHER & PORTER 55-AD-1212A USPP 55AD1212A

Fischer & Porter 10A6130 Flow Meter 10A6100 Rotameter

Fischer & Porter Flow Meter Tube 443U410U09

Fischer & Porter Flow Meter Tube 443U410U10

Fischer & Porter Flow Meter Tube 448B017U01

Fischer & Porter Flow Meter Tube FP-1/4-20-P-3/37

Fischer & Porter Flow Meter 3" Service Clamp

FISCHER PORTER METERING TUBES FLOWMETERS LOT 3 NEW!

fischer@porter mdl 50dpp111-3-rvv ae-aaa

fischer@porter mdl 500dpf 110-3-bus

FISCHER & PORTER FLOWRATE INDICATOR 801J057 UNUSED

Assorted Fischer Porter Glassware

FISCHER PORTER A31351G 0-2.5 FLOW METER W/ SKINNER

FISCHER PORTER 1" DOSAGE METER 611B091U02 USED

FISCHER & PORTER JACKETED DISTILLING VIGREUX COLUMN

FISCHER & PORTER LAB DISTILLING VIGREUX COLUMN 480 mm

NEW FISCHER PORTER PROCESS ALARM RELAY B55PA2000B

NOS Bailey Fischer Porter 10A6130 Flow Meter 250 PSIG

FISCHER & PORTER CHLOROMATIC VALVE STEPPING MOTOR

FISCHER & PORTER LOSS OF VACUUM SWITCH CHLORINE

FISCHER & PORTER VACUUM BREAKER CHLORINE

FISCHER & PORTER DUAL IN ALARM CIRCUIT BOARD CHLORINE

1" NPT Fischer & Porter Pressure Relief Valve 71P2412A
Expedited shipping available

Fischer & Porter 10A1450 Flow Meter 150 PSIG Max

Fischer & Porter 10A1450N Flow Meter 150 PSIG Max

FISCHER & PORTER DS247510 FNFP DS247510

FISCHER & PORTER F1-2108 NSFP F12108

FISCHER & PORTER F1-4068 NSFP F14068

Fischer & Porter Flow Meter 2" Service Clamp

FISCHER PORTER HYDRAULIC FLOW METER 10A3555

Fischer & Porter Flow Meter 1-1/2" Service Clamp

FISCHER & PORTER DRAIN VALVE ASSEMBLY EJECTOR CHLORINE

NOS FISCHER PORTER FLOW METER GUAGE 10A6130 250PSIG

Fischer & Porter Flowmeter # l0A6l30

FISCHER PORTER 10A3135M 8312A03461A1

FISCHER PORTER 10A3135 8203A0622A1

Fischer & Porter Flow Meter 1-1/4" Service Clamp

FISCHER & PORTER EJECTOR PLUG ASSEMBLY CHLORINE

FISCHER + PORTER " GLASS METERING VALVES "

(qty 2) Fischer & Porter flow meter housing 10A1336

Fischer & Porter Flow Meter 1" Service Clamp

FISCHER & PORTER S/S FLOWMETER OVH 20" #5903A2333B1 46A

Fischer and Porter Variable Area Flowmeter 10A1347N23B

FISCHER & PORTER FLOWMETER 1-25 TUBE 02-F 1/8-25-5/70

FP FISCHER & PORTER 1A01755 AIR GUAGE

Four used Fischer & Porter Flow Meters

ABB Fischer Porter 1/2" FNPT Flow Meter & Controller

Lot 24 Fischer-Porter 141D005U01 Chart Recorder Strip

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