6ES7951-1AH00-0AA0 亿佳没泪水

从技术原理角度来讲，触摸屏是一套透明的坐标定位系统，首先它保证是透明的，因此它通过材料科技来解决透明问题，像数字化仪、写字板、电梯开关，它们都不是触摸屏；其次它是坐标，手指摸哪就是哪，不需要第二个动作，不像鼠标，是相对定位的一套系统，我们可以注意到，触摸屏软件都不需要光标，有光标反倒影响用户的注意力，因为光标是给相对定位的设备用的，相对定位的设备要移动到一个地方首先要知道身在何处，往哪个方向去，每时每刻还需要不停的给用户反馈当前的位置才不至于出现偏差。这些对采取坐标定位的触摸屏来说都不需要；再其次就是能检测手指的触摸动作并且判断手指位置。 

透明特性

透明，它直接影响到触摸屏的视觉效果。透明有透明的程度问题，红外线技术触摸屏和表面声波触摸屏只隔了一层纯玻璃，透明可算佼佼者，其它触摸屏这点就要好好推敲一番，“透明”，在触摸屏行业里，只是个非常泛泛的概念，很多触摸屏是多层的复合薄膜，仅用透明一点来概括它的视觉效果是不够的，它应该至少包括四个特性：透明度、色彩失真度、反光性和清晰度，还能再分，比如反光程度包括镜面反光程度和衍射反光程度，只不过触摸屏表面衍射反光还没到达CD 盘的程度，对用户而言，这四个度量已经基本够了。 

由于透光性与波长曲线图的存在，通过触摸屏看到的图象不可避免的与原图象产生了色彩失真，静态的图象感觉还只是色彩的失真，动态的多媒体图象感觉就不是很舒服了，色彩失真度也就是图的大色彩失真度自然是越小越好。平常所说的透明度也只能是图的平均透明度，当然是越高越好。 

反光特性

反光性，主要是指由于镜面反射造成图像重叠身后的光影，如人影、窗户、灯光等。反光是触摸屏带来的负面效果，越小越好，它影响用户的浏览速度，严重时甚至无法辨认图像字符，反光性强的触摸屏使用环境受到限制，现场的灯光布置也被迫需要调整。大多数存在反光问题的触摸屏都提供另外一种经过表面处理的型号：磨砂面触摸屏，也叫防眩型，价格略高一些，防眩型反光性明显下降，适用于采光非常充足的大厅或展览场所，不过，防眩型的透光性和清晰度也随之有较大幅度的下降。清晰度，有些触摸屏加装之后，字迹模糊，图像细节模糊，整个屏幕显得模模糊糊，看不太清楚，这就是清晰度太差。清晰度的问题主要是多层薄膜结构的触摸屏，由于薄膜层之间光反复与反射折射而造成的，此外防眩型触摸屏由于表面磨砂也造成清晰度下降。清晰度不好，眼睛容易疲劳，对眼睛也有伤害，选购触摸屏时要注意判别。

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Square D Telemecanique Series 500 Controller 530T-1112

Square D Telemecanique LK3 TU 3 General Purpose Switch 800 Amp 600 VAC 3 Phase

Square D Telemecanique Contactor LC1F500 3 Pole 500AMP

Square D Telemecanique Contactor (LC1F500 3 Pole 500AMP)

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SQUARE D TELEMECANIQUE ATV58HD64N4XZ 460V 3PH 60HP AC DRIVE

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SQUARE D TELEMANIQUE ATV58HD16N4XZ SPEED DRIVE 400-460VAC 15HP ATV58 +OPTIONS

SQUARE D T15T68F   T15T68F

SQUARE D SYMAX SY/MAX DUAL ConVERTER 8030 CRM-601 8030CRM-601 8030 CRM601 B1

Square D Symax RIM-126 Thermocouple Input Module

Square D Symax processor 401 rack rrk-100 and power supply ps-25

Square D SYMAX Model 300 Processor 8020 SCP-312  

SQUARE D SYMAX INTERFACE CARD CLASS 8010 SFI510 SFI 510 SER A1 REV 2.01  

SQUARE D SYMAX 8881 SA-1 *NIB* 120VAC SIGNAL ConVERTER CARD SER B (16C0)

SQUARE D SY/NET NETWORK INTERFACE MODULE MODEL CRM-565

SQUARE D SY/MAX SCP654 MODEL 650 PROCESSOR REV.4.10 SERIES C WITH ETHERNET  

Square D Sy/Max Processor Module, 8020 SCP-523, Series 1,  , WARRANTY

SQUARE D SY/MAX PROCESSOR MODULE PLC 400 8020 SCP444 8020SCP444 SCP-444 SER E

Square D SY/MAX PLC 8010-SFI-510X INTERFACE BOARD

Square D SY/MAX Model CP 50 Programmable Controller with RT-108 & EPU-1, AN-108

SQUARE D SY/MAX MODEL 700 MEMORY MODULE 8020 SMM-720 SER. I2 REV. 6.00 12 VDC

SQUARE D SY/MAX MODEL 700 MEMORY MODULE 8020 SMM-720 SER. H 12 VDC

Square D SY/MAX Model 600 Demo Device Processor Module with Key

SQUARE D SY/MAX CLASS 8030 RIM123 X RIM123X SERIES A2 1.01 INPUT MODULE

SQUARE D SY/MAX CLASS 8030 RIM123 SERIES A2 1.01 INPUT MODULE

SQUARE D SY/MAX CLASS 8030 RIM123 R RIM123R SERIES A2 1.01 INPUT MODULE

SQUARE D SY/MAX CLASS 8005 CP-50, AN-108, (2) RT-108, DN-116, TT-116, LNV-101

SQUARE D SY/MAX 8055 SCP654 Model 650 PROCESSOR 16K MEMORY C 4.10

SQUARE D SY/MAX 8030CRM565 REV C , SYNET POWER , (P1)

SQUARE D SY/MAX 8030CRM565 REV A2 , SYNET POWER , (P1)

SQUARE D SY/MAX 8030CRM510 REV H2 , NETWORK INTERFACE , (P1)

SQUARE D SY/MAX 8030CRM510 REV H1 , NETWORK INTERFACE , (P1)

SQUARE D SY/MAX 8030-CRM275 *FACTORY SEALED*

SQUARE D SY/MAX 8030-CRM210 * *

SQUARE D SY/MAX 8030 CRM-560 CRM 560 CRM560 SER. D2 8030-CRM-560  

SQUARE D SY/MAX 8020-SCP-523X PROCESSOR SERIES M1 REV 9.00 8020SCP523X

SQUARE D SY/MAX 8020-SCP-424 MODEL 400 PROCESSOR 8020SCP424

SQUARE D SY/MAX 400 8020 SCP-423 SCP423 SERIES C5 REV 3.40 5VDC PROCESSOR  

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Square D Surgelogic TVS2XGA16AI Surge Protector Modular 208 4 Wire (NOS) (NIB)

Square D SurgeLogic TVS2WA12X Transient Voltage Surge Suppressor 120 kA 208Y/120

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Square D Surgelogic Surge Protective Device TVS2HWA10X - 208Y/120V - 3 Phase

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Square D Surgelogic FC4IMA16C I-Line Surge Protective Device 160ka

Square D SurgeLogic FC1IMA12 With Square D FC 60 Amp I Line Circuit Breaker

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Square D STARTER Size 6 8536SHO254

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Square D Stainless H364NDS 200a 600v F    Safety Switch H364DS

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Square D SQ MHL36100040DC MA11352 / MA11128 1000A 500V Circuit Breaker

Square D Sorgel Transformer 480v 30 Kva   W/ Box 30t1755hfisnl42db

Square D Sorgel Single Phase 100S3H 100 KVA Transformer Prim 240/480 Sec 120/240

Square D Sorgel EE45T211H 3Ph 45kVA General Purpose Transformer 208v-120v NICE

Square D Sorgel 75KVA Transformer Cat #EE75T1749H

Square D Sorgel 3 Phase Insulated Transformer 112T3HFISNLP 112.5 KVA Sheilded!

Square D Sorgel 3 Phase General Purpose Transformer EE300T3HCU 35949-17212-090

SQUARE D SORGEL 3 PHASE GENERAL PURPOSE TRANSFORMER 30 KVA 30T76HF42DB * *

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Square D Sorgel 225 Kva Transformer Primary 480 Sec 480Y/277 3 Phase 225T76H Iso

Square D Sorgel 167 KVA Transformer 1 Ph 167S61 H Prim 277 Sec 120/240

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Square D Sorgel 112.5 Kva Transformer Primary 480 Sec 480Y/277 Volt 112T76H

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Square D Solid State 25 HP Reduced Voltage Starter

SQUARE D SKAL3150   SKAL3150

SQUARE D SK4515 CIRCUIT BREAKER MOUNTING KIT *SEALED*

SQUARE D SIZE SZ 5 motor STARTER COMBO combination 400A 8538 SGG33 B 8536

Square D Size 6 8536SHO2 Motor Starter 8536 SHO2 SqD Sz 6 120V

Square D Size 5 Starter with Motor Logic Plus Overload

SQUARE D SIZE 5 SGO1V02 AC MAGNETIC STARTER, 8536, OPEN TYPE S,   IN BOX

Square D Size 5 Contactor Cat# 8502SG025 Nema 1

Square D Size 5 Combination Starter Box 400 Amp Stainless Steel SS 3R 8536 F 

Square D Size 5 Combination Starter Box 400 Amp Stainless Steel SS 3R 8536 Fuse

Square D Size 5 Combination Starter Box 400 Amp 12/3R 8538 F 

Square D Size 5 Combination Starter 400 Amp F  460v coil

Square D size 4 Reversing magnetic Starter

SQUARE D SIZE 4 COMBINATION STARTER CIRCUIT BREAKER TYPE

SQUARE D SIZE 4 200 AMP 600 VOLT 480 VOLT COIL COMBINATION STARTER

Square D Size 3 Reversing Combination, 120V 3Ph, Non-Fusible Disconnect, IN BOX!

Square D Size 3 Fusible Combo Starter 70-100 amp 480 vac 110/120v Coil

Square D Size 3 Disconnect: Inv 16666

Square D Size 3 8702 SEO 2 51 Reversing Motor Contactor Sz 3 120 V 31074-400-38

Square D Size 1, Two Speed Enclosed Combination Starter Class 8810 NIB!!!

SQUARE D SIZE 1 MOTOR STARTER 30 AMP BREAKER MCC MCCB BUCKET

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Square D S-Flex AC Drive SFD212HG2YB06B07 10HP 208V AHIVAR 212

Square D SFD21CG3Y S-Flex Enclosed Variable Freq. AC Drive Controller 1 HP, 230V

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Square D SEPAM Series 40 Protective Digital Relay SQ1S42A

Square D SEFG20 2000 Amp 600 Volt 3 Phase Circuit Breaker bolt on

Square D SEFG08 800 Amp 600 Volt 3 Phase Circuit Breaker bolt on

Square D SE frame Programmer 3000A LSIG with S9-303000RP

Square D SD75430 Bus Plug - Reconditioned

Square D SD-3603 Series 3 Round Bar Bus Plug,  

SQUARE D SD SD9345BB 400 AMP 600V FUSIBLE F  BUS PLUG sd9345

SQUARE D SD SD78400 200 AMP 600V CIRCUIT BREAKER BUS PLUG SER 3

SQUARE D SD SD67728 SD-67728 250 AMP 600V BREAKER BUSS BUS PLUG BROKEN STAB

SQUARE D SD SD3855 SD-3855 600 AMP 600V BREAKER BUS PLUG TAP BOX BUSWAY 225 400

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Square D Schneider Electric LG600 600amp 3 pole breaker

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Square D SB 124IR METERED SWITCHGEAR 120/240 NEMA 3R 400 AMP SERIES E2

SQUARE D SAFLEX BUSWAY CIRCUIT BREAKER SD-75715   SD75715

Square D Safety Switch, Fusible, 3PST, 400A, 600V Model: H365N

Square D Safety Switch HU361DFEI, 30A 600V 3P NEMA 4X,  !!!

SQUARE D SAFETY SWITCH #H362DS SERIES E STAINLESS STEEL

Square D Safety Disconnect W/Size 2 Starter SDG 43 Class 8539 50A 660V (NIB)

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SQUARE D S33931   S33931

SQUARE D S33930   S33930

Square D S164A Micrologic 6.0P Trip Unit,  !

SQUARE D S163A   S163A

SQUARE D S143A   S143A

SQUARE D S143A MICROLOGIC 5.0 A TRIP UNIT 600/690V 50/60 HZ  

Square D S143A Micrologic 33072 5.0A

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Square D RKF36200CU43AE1 Breaker, 2000 A, 65 kAIR, Modbus,  

Square D RKF3612CU44A PowerPact RK1200 1200 Amp 3 Pole Circuit Breaker LSIG

Square D RFK36200U33A 2000 FIX MO LSI TRIP

Square D RFK36120U33A 1200 FIX MO LSI TRIP

Square D Reversing Starter Class 8736 Type SGO32 Size 5 missing contacts

Square D Reversing Motor Starter Assembly w/ Class 8502 SFO-1 & SFO-2 Excellent

Square D Reversing Contactor 8702SD02V03 8701 SD02V03

SQUARE D REHU494IP Disconnect Switch

SQUARE D REHU493IP Disconnect Switch

Square D Reduced Voltage Combo Starter Size 5 Motor Controller 150 HP 8536 SGO1

SQUARE D RED. VOLTAGE SOLID STATE STARTER 350HP 8638 LSA4S (WASH)

Square D Reconditioned QMB3660 Saflex Panel Board Switch 600A 600V Fusible Nema1

Square D Reconditioned QMB3640 Saflex Panel Board Switch 400a 600V Nema1 Fusible

Square D Reconditioned NA36900 I-Line 900A 600V 3 Pole Thermal Magnetic LI Trip

Square D Reconditioned NA361200 I-Line 1200A 600V 3 Pole Thermal Magnetic

Square D Reconditioned MHL3645025DC1679 Feed Through 450A 600V 3 Pole AUX Switch

Square D Reconditioned ME436LSIG 400A 600V 3 Pole I-Line LSIG Trip Micrologic

Square D Reconditioned LX36400G I-Line 400A 600V 3 Pole LSIG Trip Functions

Square D Reconditioned LE36300LSG 300A 600V 3 Pole I-Line Solid State Micrologic

Square D ReactiVar, type-AV5000, cat#AV035045CV5F6N, KVAR 3503ph, 480V

SQUARE D REACTIVAR POWER FACTOR CAPACITOR PFCD4100 100KVAR 120 IN A 480V VOLT

SQUARE D RC12V120   RC12V120

SQUARE D QOU3251021 25amps 3 Poles CIRCUIT BREAKER - 16 pcs   IN BOX

SQUARE D QO342MQ225RB Load Center

SQUARE D QO330MQ150RB Load Center

SQUARE D QO160M200PC Load Center

SQUARE D QO142M200P Load Center

SQUARE D QMJ365 SAFETY SWITCH *  OUT OF BOX*

Square D QMJ365 Branch Switch, 400 A, Fusible, QMJ,  !

Square D QMJ365

Square D QMJ364H Fusible Disconnect Switch 200A 600V 3Ph 3P Ser. E1

SQUARE D QMJ QMJ366 600 AMP 600V F  FUSIBLE PANEL PANELBOARD SWITCH SER E1

SQUARE D QMJ QMJ365 400 AMP 600V F  FUSIBLE PANELBOARD SWITCH SER E1

SQUARE D QMB368 SER. E1 1200 AMP 600 VOLT PANELBOARD SWITCH

SQUARE D QMB367W FUSIBLE DISConNECT SWITCH 800A 600V

Square D QMB367MW   Fusible Main Panel Switch 800A, 600Volt 3-Phase W/Fuses

SQUARE D QMB366W   QMB366W

Square D QMB366W Fusible Panelboard Switch, 600 Amp, 3 pole, 600Vac -  

Square D QMB366W Fusible Panelboard Switch 600V 600A Ser E2

SQUARE D QMB366W 600 AMP 600V MC Bucket FUSIBLE SWITCH SER E2 W/Fuses

Square D QMB365W Fusible 400A 600V Disconnect Switch Series E1 Recondi