Distributed Power Wireless Control System was developed for WAG9 & WAG9H class of locomotives to provide Distributed Power Operation for achieving heavy haul. Using DPWCS, Distributed Power (DP) operation is possible through wireless. In DP operation, two or more locomotives are attached in one train but dispersed at different locations. The operation command of the train is achieved from the lead loco known as the Master using a single set of crew. Other locomotives are Slaves which receives command from the Master and do not normally have crew. The Slave locomotives which are distributed in a train, obeys the command from the master locomotive through radio signals. DP operation enables heavy haul and other benefits like increased throughput.
DIU is an interface between the driver and system. The DIU shall act as terminal simply to receive and display information from CCU (Control & Communication Unit) and to send keyed in information to CCU.