Phoenix Contact 2907780 A process indicator is a multifunctional device designed to be used in the field, typically housed in a protective enclosure. Its primary function is to monitor and display analog measurement data from various sources such as current, voltage, thermocouples (TCs), and resistance temperature detectors (RTDs). Additionally, it features two relay change-over contact outputs and one analog output, providing users with versatile connectivity options for monitoring and controlling process parameters in the field.