The TCG 02-G is a highly accurate, fully featured GPS and GLONASS (GNSS) clock. Offering multiple oscillator options, Time Code and Frequency outputs, it fits virtually any timing application. With enhanced cyber security features that support NERC CIP requirements, the TCG 02-G is designed for use in modern day smart grid / smart substations, electricity distribution, transmission, and generation protection. In addition industrial application systems and traditional substations are equally provided for. This master clock synchronizes multiple IEDs (Intelligent Electronic Devices) within a network, including protection relays, synchrophasors, event recording and remote telemetry units to enable accurate time stamping. The TCG 02-G is available with one of two expansion module options.