{"product_id":"allen-bradley-1786-rpfrxl-b-controlnet-fiber-ring-extra-long-distance-repeater","title":"Allen-Bradley 1786-RPFRXL\/B ControlNet Fiber Ring Extra-Long Distance Repeater","description":"\u003ch2\u003eAllen-Bradley 1786-RPFRXL\/B ControlNet Fiber Ring Extra-Long Distance Repeater\u003c\/h2\u003e\n\u003cp\u003eConfigured for signal regeneration and network extension in ControlNet platforms, the \u003cstrong\u003eAllen-Bradley 1786-RPFRXL\/B\u003c\/strong\u003e (\u003cstrong\u003e1786-RPFRXL\/B\u003c\/strong\u003e Fiber Optic Repeater Module) provides direct physical\/electrical execution. It retimes and transmits deterministic 5 Mbps data streams across single-mode or multi-mode fiber optic cable runs. The module eliminates ground potential differences and guarantees high electromagnetic immunity across extended network segments without introducing transmission jitter or frame degradation.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1786-RPFRXL\/B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.4 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e2.8 W max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current Rating\u003c\/td\u003e\n\u003ctd\u003e570 mA at 5 VDC (Relay: 900 mA at 30 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Rate\u003c\/td\u003e\n\u003ctd\u003eFixed 5 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Wavelength\u003c\/td\u003e\n\u003ctd\u003e1310 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Media Supported\u003c\/td\u003e\n\u003ctd\u003eSingle-mode (9\/125 um) up to 20 km; Multi-mode (62.5\/125 um) up to 3 km\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eST (Straight Tip) connectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e50 V continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Gauge Size\u003c\/td\u003e\n\u003ctd\u003e22 to 14 AWG copper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eDIN rail via repeater adapter rack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironmental Ratings\u003c\/td\u003e\n\u003ctd\u003eShock: 30 g operating; Vibration: 5 g at 10-500 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\u003ctd\u003eCE, UL, CSA, IECEx, ATEX Zone 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Network Isolation \u0026amp; Determinism\u003c\/h3\u003e\n\u003cp\u003eThe 1786-RPFRXL\/B module integrates dedicated backplane bus communication velocity processing with optical signal re-clocking to enforce determinism across ControlNet ring topologies. By converting electrical coaxial frames into 1310 nm optical pulses, the unit insulates sensitive controller hardware from high-voltage transients and industrial noise. Signal propagation delays remain fixed, maintaining strict scheduled and unscheduled I\/O density scaling and network time-slot synchronization across 20 km fiber segments. Firmware flash compatibility ensures seamless optical media conversion without requiring modifications to the controller scan list or network configuration software.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the optical budget limitation when deploying the module on single-mode versus multi-mode fiber?\u003c\/p\u003e\n\u003cp\u003eA: The module supports a maximum physical distance of 20 km using 9\/125 um single-mode fiber at a 1310 nm wavelength. When attached to 62.5\/125 um multi-mode fiber infrastructure, the maximum allowable distance is restricted to 3 km due to modal dispersion limitations at 5 Mbps.\u003c\/p\u003e\n\u003cp\u003eQ: How does the internal relay output function during power loss or link degradation?\u003c\/p\u003e\n\u003cp\u003eA: The fault relay contacts (rated for 900 mA at 30 VDC) change state when 5 VDC power drops below operational thresholds or when optical link loss is detected on either channel. This provides a hardware fault contact for external alarm circuits or PLC digital input monitoring.\u003c\/p\u003e\n\u003cp\u003eQ: Can this repeater module be hot-swapped into an energized repeater adapter base?\u003c\/p\u003e\n\u003cp\u003eA: Removal and insertion under power (RIUP) is permissible only if the surrounding atmosphere is free of flammable gas concentrations. In ATEX Zone 2 installations, power to the rack base must be removed prior to pulling or seating the module to avoid spark hazards on the backplane interface.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the 1786-RPFRXL\/B onto the dedicated 1786 repeater adapter rack on standard DIN rail. Ensure the DIN rail is grounded directly to the central panel enclosure earth bus using a short, heavy-gauge copper strap (minimum 8 AWG) to maintain 50 V continuous isolation protection.\u003c\/p\u003e\n\u003cp\u003eWhen terminating fiber optic links, clean all ST connectors with lint-free optical wipes and isopropyl alcohol prior to insertion. Observe the minimum bend radius specifications for single-mode fiber (typically 10 times the outer cable diameter) to avoid micro-bend attenuation. Tighten all screw terminal copper wiring (22 to 14 AWG) to a torque rating of 0.6 to 0.8 Nm. Maintain separation between optical fiber runs and high-voltage AC power cabling inside wire ducts to prevent physical cable damage.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43757275250778,"sku":"1786-RPFRXL\/B","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1786-RPFRXLB2.jpg?v=1785312953","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1786-rpfrxl-b-controlnet-fiber-ring-extra-long-distance-repeater","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}