ELSPEC MULTI I/O MODULE for BLACKBOX G4420 G4-GPIO POWER QUALITY ANALYSERELSPEC Multi I O Module for BLACKBOX G4420 G4 GPIO Power Quality Analyzer The ELSPEC Multi I O Module is designed for integration with the BLACKBOX G4420 power quality analyzer. It provides extended analog and digital I O interfaces, enabling remote monitoring and control in power quality analysis systems. Key Specifications Model Compatibility: BLACKBOX G4420 G4 GPIO Interface: RS 232 serial communication Analog I O: Inputs: A1A4 Outputs: AO1AO4