8 port RS-485 to 2 port optic fiber converter, redundancy, multi-mode 2 km, 5VDC/12-48VDC/220VAC, SC/ST optional. IMF208-2F-M is a high performance, unmanaged, redundancy ring RS485 to fiber converter, it used in industry application. It supports point to point two fiber port backup for each other, Fiber line (Ring) transmission, supports 8 channel RS-485 (RS-485 adopts 5 bits terminal block) and 2 port 100Base-FX fiber port, meantime, 2 fiber p..