... Mini Rack Fiber Modem Single Mode Dual Fiber 20Km 1310nm SC/FC connector 220V or 48V RS485 Fiber Modem, Dual Fiber Mini Rack Fiber Optical ... MultiplexerSPD-RS485-D-20-131SRS485 Fiber Modem, Single Mode, Dual Fiber, 20Km, 1310nm, ... 220V or 48V, Mini rack RS485 Fiber Modem. We test each piece of RS485 Fiber Modem before shipment to ensure ...