Development of the LLRF system at ESS is coordinated by the Lund University, but part of it, LLRF systems for M-Beta and H-Beta sections, will be delivered within in-kind contribution from Poland. This document will describe the scope of work, work plan, and technical details of the selected components of the MBeta and H-Beta LLRF systems sections. Described contribution will be made by the Polish Electronic Group (PEG), a consortium of three scientific units. LLRF system for ESS will be made of both, commercially available components and components designed specially for this project, and those last ones will be presented and described here. Except the technical details, the organizational aspects, such as schedule, project management or quality control, will be presented as well. POLISH ELECTRONIC GROUP For the purpose of participation in ESS LLRF system development within polish in-kind contribution (IKC), a consortium of three polish research units has been established and called Polish Electronic Group (PEG). PEG consortium is made of National Centre for Nuclear Research (NCBJ) – the consortium leader, Warsaw University of Technology (WUT) and Technical University of Lodz (TUL). All three institutions are experienced in development of the LLRF systems for FLASH and X-FEL. Due to common technologies, such as MTCA.4 [1], used in X-FEL and ESS, PEG members skills can be directly applied at ESS. ESS LLRF SYSTEM AND SCOPE OF PEG CONTRIBUTION LLRF System for ESS [2] (Fig. 1) will be implemented as FPGA based digital feedback system, based on the MTCA.4 electronics standard. All together planned MBeta and H-Beta cavities will require 120 LLRF units, while in the period covered by the PEG IKC contract, only 80 LLRF units will be installed. Each LLRF unit will be single MTCA.4 crate, where both, commercially available and custom designed components will be used. PEG will design for ESS following devices: • RTM Carrier Board – low cost MTCA.4 board capable of supporting selected RTMs (Rear Transition Modules). • LO generation and distribution unit. • Piezo driving and sensing unit for cavity resonance control. Except of mentioned custom designed components, PEG will be responsible for assembling, testing, delivery and partial (in-rack) installation of the 80 LLRF systems for the M-Beta and H-Beta cavities. Figure 1: General layout of single ESS LLRF unit, custom designed devices has been marked with the rectangle at the bottom.