EZAutomation’s industrial HMI and touch panel units (16/07/2009)... with Slim Bezel, 5.7" STN Monochrome display, NEMA4 & 4X (indoor) FDA Compliant front, 192 cell resistive touch screen, 512 KB of RAM (expandable to 1.5MB) and 20-30VDC operating range. This touch panel unit accepts optional 512K, 1MB, or 2 MB ...