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。
SQUARE DUE SERVO MOTOR SER39B4L3SSOAO1
Square Due Series 500 Controller 530T-1112
Square Due LK3 TU 3 General Purpose Switch 800 Amp 600 VAC 3 Phase
Square Due Contactor LC1F500 3 Pole 500AMP
Square Due Contactor (LC1F500 3 Pole 500AMP)
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SQUARE D T15T68F T15T68F
SQUARE D SYMAX SY/MAX DUAL ConVERTER 8030 CRM-601 8030CRM-CRM601 B1
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Square D SYMAX Model 300 Processor 8020 SCP-312
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SQUARE D SYMAX 8881 SA-1 *NIB* 120VAC SIGNAL ConVERTER CARD SER B (16C0)
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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 SCP444 8020SCP444 SCP-444 SER E
Square D SY/MAX PLC 8010-SFI-510X INTERFACE BOARD
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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
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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 SCP-423 SCP423 SERIES C5 REV 3.40 5VDC PROCESSOR
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SQUARE D SK4515 CIRCUIT BREAKER MOUNTING KIT *SEALED*
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SQUARE D SIZE 5 SGO1V02 AC MAGNETIC STARTER, 8536, OPEN TYPE S, IN BOX
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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
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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 3
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SQUARE D SIZE 1 MOTOR STARTER 30 AMP BREAKER MCC MCCB BUCKET
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Square D Safety Switch HU361DFEI, 30A 600V 3P NEMA 4X, !!!
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Square D Safety Disconnect W/Size 2 Starter SDG 43 Class 8539 50A 660V (NIB)
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SQUARE D S33930 S33930
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SQUARE D S163A S163A
SQUARE D S143A S143A
SQUARE D S143A MICROLOGIC 5.0 A TRIP UNIT 600/690V 50/60 HZ
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SQUARE D REHU494IP Disconnect Switch
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SQUARE D RED. VOLTAGE SOLID STATE STARTER 350HP 8638 LSA4S (WASH)
Square D Reconditioned Saflex Panel Board Switch 600A 600V Fusible Nema1
Square D Reconditioned Saflex Panel Board Switch 400a 600V Nema1 Fusible
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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
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SQUARE D RC12V120 RC12V120
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SQUARE D Load Center
SQUARE D Load Center
SQUARE D Load Center
SQUARE D Load Center
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Square D QMJ365 Branch Switch, 400 A, Fusible, QMJ, !
Square D QMJ365
Square D Fusible Disconnect Switch 200A 600V 3Ph 3P Ser. E1
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SQUARE D QMJ QMJ365 400 AMP 600V F FUSIBLE PANELBOARD SWITCH SER E1
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SQUARE D
Square D Fusible Panelboard Switch, 600 Amp, 3 pole, 600Vac -
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SQUARE D 600 AMP 600V MC Bucket FUSIBLE SWITCH SER E2 W/Fuses
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