DL305 Data Communications Unit Manual

This document describes the DL305 Data Communications Unit (DCU), which can operate as a general-purpose communication port for connecting a DL305 PLC to devices like operator interfaces or PCs, or as a DirectNET network interface for sharing data between PLCs and intelligent devices. It covers specifications, communication parameters, and supported protocols such as RS232C, RS422, and DirectNET (HostLink/CCM).