{"title":"Industrial RS485 Opto-Isolated Hub","handle":"industrial-rs485-opto-isolated-hub","url":"/products/industrial-rs485-opto-isolated-hub","description":"A 4-port RS-485 bus hub with optical isolation and surge protection, designed for industrial environments with complex electromagnetic interference. Each port is independently opto-isolated at 2500 V and protected against 600 W lightning surges, ensuring that a fault on one network segment does not affect the others.\n\nThe hub provides star-topology RS-485 bus connections with automatic data direction sensing, eliminating manual transmit/receive switching. It supports transmission distances up to 5 km (at 300 bps) or 1.2 km (at 115.2 kbps) over twisted pair or shielded cable, and is powered by a wide-range 9–30 V DC supply suitable for outdoor and industrial installations.\n\nKey Features\n\n\n4-Port Star Topology – Split one RS-485 bus into four independently protected segments\n\n2500 V Optical Isolation – Prevents surge propagation between ports\n\n600 W Surge Protection – Per-line lightning and transient protection on RS-485 ports\n\n±15 kV ESD Protection – On the RS-232 port\n\nAutomatic Direction Sensing – No manual transmit/receive control needed\n\nShort-Circuit & Open-Circuit Protection – On each port independently\n\n7 Status LEDs – Power, TX, RX, and per-port fault indicators (E1–E4)\n\n\nSpecifications\n\n\nInterface Standards – RS-232C and RS-485 (EIA/TIA compatible)\n\nWorking Mode – Asynchronous half-duplex\n\nTransmission Rate – 300 bps to 115.2 kbps\n\nTransmission Distance – Up to 5 km (speed-dependent)\n\nTransmission Medium – Twisted pair or shielded cable\n\nElectrical Interface – 10-position pluggable terminal blocks (both sides)\n\nPower Supply – 9–30 V DC, 150 mA\n\nOperating Temperature – −25 to 70 °C\n\nOperating Humidity – 5–95% RH\n\nMaximum Altitude – 3000 m\n\nDimensions – 120 × 77 × 40 mm\n\n\nIdeal For\n\nIndustrial RS-485 networks requiring segment isolation\nPower acquisition and monitoring systems\nOutdoor and electromagnetically noisy environments\nLarge-scale RS-485 bus architectures\n\n\nPackage Contents\n\n1× Industrial RS-485 Opto-Isolated Hub\n\n\nResources\n\nInstruction Manual (PDF)\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":2577,"title":"Default Title","sku":"DF-FIT0821","price":119.5,"on_sale":false,"in_stock":true,"available_quantity":80,"option1":"Default Title"}]}