Dnp3 Overview - Emerson PACSystems RX3i User Manual

User Manual
GFK-2911E
1.1

DNP3 Overview

DNP3 is a master/slave communications protocol originally developed for use in the electric
utility sector for power transmission and distribution systems. It has migrated to other
vertical markets such as water/wastewater, transportation, and oil and gas pipeline sectors.
DNP3 is the current specification of DNP (Distributed Network Protocol) which has a long
history of being a Remote Terminal Unit (RTU) protocol based on a 3-layer protocol scheme.
DNP3 provides a set of communications protocols used between components in process
automation systems.
Figure 1: DNP3 Basic System Architecture
Figure 2: DNP3 Application from Electrical Distribution Industry
Introduction
Chapter 1
Sep 2019
2