6 ports 10/100 Base-TX + 2 ports 100M fiber + 4 ports RS232 Managed Industrial Ethernet Switch. The IT-ES618-IM-2F-4D(RS-232)-P(12/48VDC) is an industrial, management, redundant industrial Ethernet switch and integrate 4 ports RS232 serial device server, it support 6 ports 10/100M Ethernet (RJ45), 2 ports 100M fiber, 4 ports RS232, 2 redundant 12~48VDC power input and 1 relay alarm output, it adopt SW-Ring™ redundant technology (Recovery time
