USED | ALLEN BRADLEY 20-HIM-A3 OPERATOR INTERFACE POWERFLEX NUMERIC LCD KEYPAD 140 MA 12 VDC HUMAN INTERFACE MODULE 20-HIM-A3 OPERATOR INTERFACE POWERFLEX NUMERIC LCD KEYPAD 140 MA 12 VDC HUMAN INTERFACE MODULE The Allen-Bradley 20-HIM-A3 is an Operator Interface designed for use with Powerflex controller platforms. It is used in industrial automation and motion control applications, specifically with PLC processors. This product is a crucial component in PLCs and HMIs for efficiently managing and monitoring processes in various industrial settings.