This data logger was designed in order to log 14 signals every 200ms to a micro SD card in CSV format so that it can be reviewed in Excel by any technician. Currently there is no way to monitor the relay logic signals that control all the systems on the Silverliner IV regional rail trains. With this data logger a technician can pick out which system they want to monitor, pick out what signals would help them identify what is causing a fault or poor performance, install the Data Logger and let it run in service for however long is needed. They can  then pull the micro SD card and review the data to identify how many times the fault happened and review the signals that contributed to the fault.