Design of remote controller of multiple unit locomotives for coal freight train in South Sumatera Indonesia

Coal demand for power station in west of Java island and the new one in Lampung province increases significantly every year. Its transported by freight train from Tanjung Enim mine in South Sumatra towards Tarahan port in Lampung. Due to some lack of railway infrastructure and rolling stock as well as single line track, long siding, number of locomotive and air brake problem then it is not possible to operate long train with multiple unit more than three locomotives consecutively in order to increase the transport coal capacity. To overcome air brake problem in multiple unit with 3 locomotives then one locomotive should be placed away from the others and this one considered as a slave. Logic control of speed, dynamic brake signals, forward, reverse and air brake status will be conditioned and processed by microcontroller and sent from master to slave via DSSS transceiver.