The FC100 is typically used with the SG000 Strike Guard Lightning Detector as part of the CS110 and LW110 lightning warning systems. The SG000 outputs its data signal via fiber-optic cable, and the FC100 is installed at the end of the fiber-optic cable and before the data logger. The FC100 converts a fiber-optic data signal into an RS-232 signal for a lightning-proof connection between the sensor and the data logger. The FC100 can also be used as an RS-232 link between two serial devices (data logger to PC) separated by less than 100 m (328 ft). The FC100 is a DCE device so a null modem cable will be needed between it and a data logger.