Name your Palette: Description: The M90/M91™ is an innovative micro-PLC (Programmable Logic Controller) with a built-in operating panel. The operating panel offers an LCD that can display two 16-character text lines, and a keypad (one line in the M90 models). The M90/M91™ series offers a variety of onboard I/O configurations, including direct temperature and weight measurement inputs; the configuration can be expanded by adding I/O Expansion Modules. The M90/M91™ is the perfect control solution for small-to-medium applications such as water treatment, automated machines, and process control. http://www.unitronics.com