TRENDnet’s Industrial Modbus Gateway, model TI-M42, provides four port serial connections, and two fast Ethernet ports at distances up to 100m (328 ft.) using Cat5e cabling . This industrial gateway allows users to connect four modbus serial devices to a network. Network Two fast Ethernet ports at distances up to 100m (328 ft.) using Cat5e cabling. Serial Connector Connect up to four RS-232/RS-422/RS-485 serial devices to the network. Industrial Design Designed with a rugged IP30 rated housing, resistance to a high degree of vibration and shock, protection against ESD/EMI/surge, and operates within a wide operation temperature range -40° - 75° C (-40° – 167° F).