MiCOM P59x Interface Units Manual

This document describes the MiCOM P59x series of interface units, including the P591, P593, P594, and P595 models, which provide communications interfacing for current differential relays (P54x and P52x) across various media such as fibre optic, pilot wires, and GPS synchronization. It details their applications, technical specifications, and connection methods for standards like G.703, X.21, EIA(RS)485, and GPS timing for use in SDH/SONET networks.