ONCE PLATO2.0 WAS CHOSEN BY ESA AS M3 MISSION THE IAA WAS SELECTED TO DESIGN, CONSTRUCT, VERIFY, AND DELIVER THE INSTRUMENTS MAIN ELECTRONICS UNITS (ONBOARD DIGITAL PROCESSING) MEU. IN JUNE 2017 ESA HAS ADOPTED THE MISSION, AND SO THE IMPLEMENTATION PHASE (B2) WILL END IN 2018, WITH THE INSTRUMENT AND SUBUNITS PRELIMINARY DESIGN REVIEWS (IPDR Y UPDR) BY ESA. THE NOMINAL LAUNCH IS PLANNED FOR THE END OF 2026._x000D_ THE PRESENT PROPOSAL FOR FOUR YEARS IS INTENDED TO COVER OUR TECHNICAL AND SCIENTIFIC CONTRIBUTION TO THE MISSION FOR PHASES B2, C AND D1, THIS LAST WILL FINISH WITH THE DELIVERY IN THE MIDDLE OF 2022 OF THE PROTFLIGHT MODEL (PFM) OF MEU, ALTHOUGH IT IS OUT OF TIME, THIS APPLICATION SHOULD COVER THE CONSTRUCTION OF THE MODEL IN ORDER TO FULFILL THE SCHEDULE OF THE CONSORTIUM. _x000D_ DURING THIS PERIOD THE PRELIMINARY DESIGN AND THE CRITICAL DESIGN PHASES WILL BE CONCLUDED WITH THEIR OWN REVIEWS (PDR AND CDR), BESIDES THE NEW CRITICAL REVIEW REQUIRED BY ESA ¿CAMERA FM READINESS REVIEW¿. DURING THIS PERIOD OF TIME IAA SHOULD DELIVER SEVERAL MODELS OF MEU TO THE CONSORTIUM AND TO ESA (FUNCTIONAL BREAD_BOARDS, EMS, EQM, MTDS AND PFM). _x000D_ IN ADDITION, WE ALSO INCLUDE THE TECHNICAL SUPPORT FOR THE OPERATION OF THE NOMAD (EXOMARS) INSTRUMENT FOR WHICH THE SAME IAA TECHNICAL TEAM IS RESPONSIBLE TOO. _x000D_ THE SCIENTIFIC CONTRIBUTION IS COMPOSED BY TWO MAIN ACTIVITIES: THE PARTICIPATION IN THE PLATO2.0 ADDITIONAL SCIENCE WORK PACKAGE AND THE DEVELOPMENT OF A RELATED SCIENTIFIC PROJECT. THE MAIN OBJECTIVE OF THE THIS PROJECT IS TO STUDY THE STAR HOSTING PLANETS AS A SINGLE PHYSICAL SYSTEM. THIS NOVEL APPROACH REQUIRES NEW DEVELOPMENTS ON THE STUDY OF STELLAR INTERIORS, PLANETARY DYNAMICS, AND HARMONIC ANALYSIS. IAA SCIENTIFIC TEAM HAS EXPERTISE IN HARMONIC ANALYSIS, AND UGR TEAM (UNIVERSIDAD DE GRANADA, ALSO SUBPROJECT IN THIS COORDINATED PROPOSAL) HAS EXPERIENCE IN ASTEROSEISMIC MODELING AND DYNAMICS. THIS IS THE REASON WHY THE PROJECT IS PRESENTED AS JOINT IAA/UGR SCIENTIFIC PROPOSAL.