The Enhanced Programmable Logic Controller Gateway (EPLCG) is a new version of the PLCG with added features and improvements . The EPLCG expands the idea of providing an economical method for connecting various Programmable Logic Controllers to your Honeywell TotalPlant Solution (TPS) system. Its redundant communications option provides two independent communication paths to the PLCs, and it features increased output performance. A new EPLCI board containing new firmware and new I/0 hardware for the EPLCG add configurations for additional applications. Depending upon certain limitations, the EPLCG can communicate to the PLCs either through short-haul modems or Communication Interface Modules (CIMs) . Six different configurations have been defined for the new EPLCG ; 2 Nonredundant and 4 Redundant.