... interface. The modems provide fiber optic connection in point to point, star, daisy chain topologies networks.SpecificationElectrical interfaceRS232/422 ... 115200bps;RS232 support for RXD, TXD, GND 3-line approach to work;RS422 support for RX-, RX +, TX-, TX + full ... : 35mmDIN-Rail, Wall Mounting. Weight :800gEnvironmentalOperating Temperature: 0 to 70°C (-40°C to85°C optional) Storage Temperature: ...