ComNet product series RLGE20FX4TX16MS is a substation-rated and industrially-hardened DIN-rail mount all-gigabit managed layer 2 switch. Fully compliant with the requirements of IEC 61850-3, IEEE 1613 Class 2, EN50155, and NEMA TS-1/TS-2, the RLGE20FX4TX16MS is intended for deployment in environments where high levels of electromagnetic noise and interference (EMI) and severe voltage transients and surges are routinely encountered, such as electrical utility substations and switchyards, heavy manufacturing facilities, track-side electronic equipment, and other difficult out-of-plant installations. The RLGE20FX4TX16MS provides 16 10/100/1000BASE-TX communications ports, with 4 10/100/1000BASE-TX or 100/1000BASE-FX SFP uplink ports. The use of SFPs for the four (4) gigabit uplink ports provides a truly future-proof platform where the uplink optics may be changed in the field at any time, to support changes in the user''s networking or cable plant requirements as they arise. The internal/self-contained 12 to 60 VDC or 85 to 264 VAC/88 to 373 VDC power supply features redundant power inputs, for the highest possible reliability in those installations where network availability is of the utmost importance. The RLGE20FX4TX16MS supports multiple Ethernet redundancy protocols, including ComNet C-Ring (recovery time < 30ms, with >250 switches integrated within the ring), and MSTP with RSTP/STP compatibility. With its extremely fast recovery time, the most mission-critical applications are fully protected from network interruptions or temporary malfunctions due to possible short or long-term faults or outages within the network.