{"product_id":"communication-modules-allen-bradley-1786-rpfm","title":"Communication Modules | Allen-Bradley 1786-RPFM","description":"\u003cp\u003eThe \u003cstrong\u003e1786-RPFM\u003c\/strong\u003e is an Allen-Bradley ControlNet modular repeater medium-distance fiber optic module engineered to extend ControlNet network segments while maintaining high signal integrity. It converts copper coaxial signals into optical signals over a dual fiber optic channel, providing galvanic isolation and immunity against electromagnetic interference (EMI) across complex industrial control layouts.\u003c\/p\u003e\n\u003ch3\u003eNetwork Topology \u0026amp; Optical Transmission\u003c\/h3\u003e\n\u003cp\u003eEquipped with dual fiber optic channels, the module supports point-to-point, star, and redundant ring network architectures. It operates at an optical wavelength of 1300 nm and is optimized for 62.5\/125 µm multimode fiber optic cables. The dual-channel design permits signal propagation up to 3000 m (9843 ft) across connected repeater links with a maximum allowable attenuation limit of 13.3 dB.\u003c\/p\u003e\n\u003ch3\u003eBackplane Integration \u0026amp; Module Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe 1786-RPFM functions as a daughter module designed to attach directly to a 1786-RPA ControlNet repeater adapter module. A single 1786-RPA base adapter supports up to four 1786-RPFM or mixed repeater modules, powered directly via the adapter backplane. The complete repeater assembly mounts onto standard 35 mm DIN rail enclosures.\u003c\/p\u003e\n\u003ch3\u003eTechnical 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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eControlNet Fiber Optic Repeater Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Fiber Type\u003c\/td\u003e\n\u003ctd\u003e62.5\/125 µm multimode optical fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e1300 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Transmission Distance\u003c\/td\u003e\n\u003ctd\u003eUp to 3000 m (9843 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Configuration\u003c\/td\u003e\n\u003ctd\u003eDual fiber optic channel\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\u003eBase Adapter Required\u003c\/td\u003e\n\u003ctd\u003e1786-RPA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Draw\u003c\/td\u003e\n\u003ctd\u003e400 mA @ 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eDIN rail \/ Panel mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.57 lbs (0.26 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation \u0026amp; Wiring Considerations\u003c\/h3\u003e\n\u003cp\u003eBefore installing or servicing the fiber module, ensure power to the parent 1786-RPA adapter is disconnected to prevent optical transceiver degradation or electrical fault. Remove protective dust caps from the fiber optic connectors only when connecting pre-terminated 62.5\/125 µm fiber cables. Maintain proper bend radius for all fiber cabling inside the cabinet to avoid excessive optical power loss.\u003c\/p\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: Can the 1786-RPFM operate as a standalone repeater module?A: No, the 1786-RPFM is a modular extension module and requires a 1786-RPA repeater adapter to handle backplane power distribution and coaxial media interface.\u003c\/p\u003e\n\u003cp\u003eQ: What type of optical cable is required for the 1786-RPFM?A: The module requires 62.5\/125 µm multimode fiber optic cabling operating at a 1300 nm transmission wavelength.\u003c\/p\u003e\n\u003cp\u003eQ: How many 1786-RPFM modules can be attached to a single 1786-RPA adapter?A: Up to four 1786-RPFM modules can be combined on a single 1786-RPA repeater adapter, subject to the maximum total current limit of 1.6 A at 5 VDC across all connected expansion modules.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67049650389107,"sku":"Communication Modules","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/1786-RPFM_2_98f03654-c3cf-487f-8b2a-9d936e509e7b.jpg?v=1793260431","url":"https:\/\/www.dcssupplier.com\/ar\/products\/communication-modules-allen-bradley-1786-rpfm","provider":"DcsSupplier Limited","version":"1.0","type":"link"}