Fieldbus universal combined optical fiber hub. Realize star connection of fieldbus fiber; Single-fiber transmission; Each module has 2 optical interfaces, and multiple modules (N pcs) can be combined into 2N optical interfaces; Can be combined with various FOURSTAR extensible fieldbus repeater hubs to form an optoelectronic hybrid hub; Support connection to FOURSTAR PROFIBUS/MPI/PPI/CC-Link/MODBUS/RS485/LonWorks/CAN and other fieldbus optical fiber adapters (single-fiber); Easy to realize all-fiber high-speed network without any electromagnetic interference; Industrial grade design; Standard lead rail mounting; ST optical fibre splice; Applicable optical fiber: multi-mode 62.5/125um and 50/125um; Maximum transmission distance: 2km.