1756-PA75/B模塊
無源底板的插槽由總線擴展槽組成?？偩€擴展槽可依據(jù)用戶的實際應(yīng)用選用擴展ISA總線、PC總線和PCI-E總線.PCIMG總線的多個插槽組成，擴展插槽的數(shù)量和位置根據(jù)需要有一定選擇，但依據(jù)不同PCIMG總線規(guī)范版本各種總線在組合搭配上有要求，如PCIMG1.3版本總線不提供ISA總線支持，該板為四層結(jié)構(gòu)，中間兩層分別為地層和電源層，這種結(jié)構(gòu)方式可以減弱板上邏輯信號的相互干擾和降低電源阻抗。底板可插接各種板卡，包括CPU卡、顯示卡、控制卡、I/0卡等.

1756-PA75-B

1756-PA75/B模塊
從技術(shù)原理角度來講，觸摸屏是一套透明的坐標(biāo)定位系統(tǒng)，它是透明的，因此它通過材料科技來解決透明問題，像數(shù)字化儀、寫字板、電梯開關(guān)，它們都不是觸摸屏，其次它是坐標(biāo)，手指摸哪就是哪，不需要二個動作，不像鼠標(biāo)，是相對定位的一套系統(tǒng)，我們可以注意到，觸摸屏軟件都不需要光標(biāo)，有光標(biāo)反倒影響用戶的注意力，因為光標(biāo)是給相對定位的設(shè)備用的，相對定位的設(shè)備要移動到一個地方要知道身在何處，往哪個方向去，每時每刻還需要不停的給用戶反饋當(dāng)前的位置才不至于出現(xiàn)偏差。這些對采取坐標(biāo)定位的觸摸屏來說都不需要，再其次就是能檢測手指的觸摸動作并目判斷手指位置。

1756-PA75-B

Module 1756-PA75/B
The slots of the passive backplane consist of bus expansion slots. The bus expansion slot can select the extended ISA bus, PC bus and PCI-E bus according to the user’s actual application. PCIMG bus consists of multiple slots, and the number and location of expansion slots can be selected according to your needs. However, according to different PCIMG bus specification versions, various buses have requirements for combination and collocation. For example, PCIMG1.3 does not provide ISA bus support. This structure can reduce the mutual interference of logic signals on the board and reduce the impedance of the power supply. The bottom plate can be inserted into various board cards, including CPU card, display card, control card, I/0 card, etc.
Module 1756-PA75/B
From the technical principle point of view, the touch screen is a set of transparent coordinate positioning system, it is transparent, so it through material technology to solve the transparent problem, like digitizer, writing pad, elevator switch, they are not touch screen, secondly it is coordinates, fingers touch where is where, do not need two actions, unlike the mouse, is a set of relative positioning system, we can notice, Touch screen software does not need the cursor, but the cursor affects the user’s attention, because the cursor is used for the relative positioning of the device, the relative positioning of the device to move to a place to know where to go, which direction to go, every moment also need to keep giving the user feedback on the current position to avoid deviation. These are not necessary for the touch screen to take coordinate positioning, and then it can detect the touch action of the finger and determine the finger position.

1756-PA75-B