The ABB MD21 is an operator interface panel designed to work with ABB M10x motor control and protection units such as M101 and M102. It provides a user‑friendly way to monitor, display, and configure motor control parameters and protection status. The MD21 integrates an LCD display, LED indicators, and pushbuttons for local operation, navigation, and parameterization of the associated M10x module. It allows operators and service personnel to easily view motor running data, maintenance and diagnostic information, and status indicators directly at the control panel.