The SPC-800 series of arm-mounted HMIs with full IP66-rated protection provides a cabinet-free solution for operation in challenging industrial environments. The series features an integrated support arm system mount adapter and a customizable extension unit to facilitate diverse visualization and control applications. The system has IP66-rated ingress protection and IEC 61131-2/61010 certification. The extension unit supports additional peripherals and controls such as an RFID reader, key-operated selector switches, LED indicators, push buttons and emergency stop buttons. This allows the system to be configured flexibly and the functionalities expanded for specific usage requirements. The integrated mount adapter supports both pendant and pedestal mounting.