{"product_id":"allen-bradley-1786-rpfm-controlnet-modular-repeater-medium-distance-fiber-module","title":"Allen-Bradley 1786-RPFM ControlNet Modular Repeater Medium-distance Fiber Module","description":"\u003cp\u003eConfigured for optical media conversion and distance extension in ControlNet industrial networks, the \u003cstrong\u003eAllen-Bradley 1786-RPFM\u003c\/strong\u003e (\u003cstrong\u003e1786-RPFM\u003c\/strong\u003e ControlNet Modular Repeater Medium-distance Fiber Module) provides direct physical execution of coaxial-to-fiber signal transition across segments up to 3 km.\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-RPFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\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\u003e0.50 lbs (0.23 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 1786 Series Form Factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C (32 to 140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e2 W max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e5 VDC (Backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Draw\u003c\/td\u003e\n\u003ctd\u003e400 mA @ 5 VDC max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Rate\u003c\/td\u003e\n\u003ctd\u003e5 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Cable Type\u003c\/td\u003e\n\u003ctd\u003e62.5\/125 Micron multimode OM-1 fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Operating Wavelength\u003c\/td\u003e\n\u003ctd\u003e1300 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Termination Type\u003c\/td\u003e\n\u003ctd\u003eST (Plastic or Ceramic)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTX Power (Min)\u003c\/td\u003e\n\u003ctd\u003e-16 dBm @ 25 deg C into 62.5\/125 um fiber; -19.5 dBm @ 25 deg C into 50\/125 um fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRX Responsivity (Min)\u003c\/td\u003e\n\u003ctd\u003e-32.8 dBm @ 25 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Cable Attenuation\u003c\/td\u003e\n\u003ctd\u003e13.3 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical Distance\u003c\/td\u003e\n\u003ctd\u003e0-3 km (0-9843 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Topologies\u003c\/td\u003e\n\u003ctd\u003eStar, Linear, Ring, Point-to-Point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003ePanel Mount \/ DIN Rail (Vertical or Horizontal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Backplane Bus \u0026amp; Fiber Physical Layer Behavior\u003c\/h3\u003e\n\u003cp\u003eThe 1786-RPFM interfaces directly with a 1786-RPA adapter via the backplane bus to maintain 5 Mbps deterministic network execution across extended fiber links. Up to four 1786-RPFM modules can be attached to a single 1786-RPA adapter, provided total backplane current draw remains within the 1.6 A @ 5 VDC threshold. The optical transceiver operates at a 1300 nm wavelength, translating electrical ControlNet signals into optical pulses to prevent ground loops, eliminate cross-talk, and maximize noise immunity in high EMI industrial environments. Fiber link integrity depends on keeping optical attenuation below the maximum budget of 13.3 dB across all connectors, splices, and cable runs.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How many 1786-RPFM modules can be attached to a single 1786-RPA base adapter?\u003c\/p\u003e\n\u003cp\u003eA: A maximum of four 1786-RPFM repeater modules can be attached to one 1786-RPA base adapter, provided the total combined current draw of all expansion modules does not exceed 1.6 A @ 5 VDC from the backplane.\u003c\/p\u003e\n\u003cp\u003eQ: What determines the maximum achievable distance of a fiber segment using the 1786-RPFM module?\u003c\/p\u003e\n\u003cp\u003eA: While the typical segment length is rated up to 3 km (9843 ft), actual distance limits are defined by the optical loss budget. The total signal attenuation across the OM-1 62.5\/125 micron fiber cable, connectors, and splices must not exceed 13.3 dB at 1300 nm.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure Requirements\u003c\/strong\u003e: Install the module inside an IP54 or NEMA Type 4 rated industrial enclosure accessible only via tool usage to prevent direct exposure to live electrical backplane components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Orientation\u003c\/strong\u003e: Secure the module on a standard DIN rail or panel surface using vertical or horizontal mounting orientation. Ensure adequate clearance around the backplane bus header for solid mechanical latching with the 1786-RPA base module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiber Cable Handling\u003c\/strong\u003e: Use 62.5\/125 micron OM-1 multimode fiber optics terminated with ST connectors. Ensure minimum bend radius limits specified by the cable manufacturer are strictly observed to avoid micro-bends that induce optical signal loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Maintenance\u003c\/strong\u003e: Clean all ST optical connectors and receiver\/transmitter ports with lint-free optical wipes and isopropyl alcohol prior to insertion. Dust caps must remain installed on unused ports at all times.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAttenuation Testing\u003c\/strong\u003e: Perform an Optical Time-Domain Reflectometer (OTDR) test or optical power meter verification after installation to confirm total link loss remains well under the 13.3 dB maximum threshold before applying power.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48770270462142,"sku":"1786-RPFM","price":95.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1786-RPA_3_0b102bc8-4b3b-431d-89af-f99f5dcbeb9b.png?v=1787296806","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1786-rpfm-controlnet-modular-repeater-medium-distance-fiber-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}