{"product_id":"1756-rmc3-allen-bradley-controllogix-fiber-optic-redundancy-cable","title":"1756-RMC3 Allen-Bradley ControlLogix Fiber Optic Redundancy Cable","description":"\u003ch3\u003e\u003cb\u003eProduct Identity | 1756-RMC3 Redundancy Cable\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #C65D21;\"\u003eAllen-Bradley 1756-RMC3\u003c\/span\u003e\u003c\/strong\u003e is a 3-meter fiber-optic connector cable for ControlLogix redundancy systems. It connects compatible redundancy modules and supports communication between redundant controller chassis.\u003c\/p\u003e\n\n\u003cp\u003eAs part of the \u003cstrong\u003eControlLogix 1756-RMCx cable family\u003c\/strong\u003e, this model provides a defined connection length for paired-chassis installations. Engineers should order the cable separately when the selected module package does not include it.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Allen-Bradley \/ Rockwell Automation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct family:\u003c\/strong\u003e ControlLogix\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #C65D21;\"\u003e1756-RMC3\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent type:\u003c\/strong\u003e Fiber-optic redundancy connector cable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal length:\u003c\/strong\u003e 3 m (9.84 ft)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary purpose:\u003c\/strong\u003e Interconnection of compatible redundancy modules\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cb\u003eEngineering Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\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\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel number\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1756-RMC3\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct series\u003c\/td\u003e\n\u003ctd\u003eControlLogix 1756-RMCx\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComponent category\u003c\/td\u003e\n\u003ctd\u003eRedundancy module connector cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission medium\u003c\/td\u003e\n\u003ctd\u003eFiber optic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable length\u003c\/td\u003e\n\u003ctd\u003e3 m (9.84 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength\u003c\/td\u003e\n\u003ctd\u003e1300 nm, as stated in the supplied specifications; verify against the applicable technical manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission rate\u003c\/td\u003e\n\u003ctd\u003eListed as less than 1000 MB\/s in the supplied data; confirm the manufacturer's specified interface rate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e1, according to the supplied specifications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible modules\u003c\/td\u003e\n\u003ctd\u003e1756-RM2, 1756-RM2K, 1756-RM2XT, subject to the manufacturer's compatibility documentation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e0°C to 60°C (32°F to 140°F), according to the supplied technical data\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApproximately 0.11 kg (0.25 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire size\u003c\/td\u003e\n\u003ctd\u003e20 AWG, as listed in the supplied specifications; verify applicability to the fiber-optic assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eNo separate enclosure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e612598560851\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecification control:\u003c\/strong\u003e The supplied source lists some electrical-style parameters that may not fully describe a fiber-optic cable. Confirm the optical interface, connector type, channel arrangement, and transmission specifications against the original manufacturer documentation before purchase.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eConnection Architecture | Where This Cable Fits\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #C65D21;\"\u003e1756-RMC3\u003c\/span\u003e\u003c\/strong\u003e belongs to the cable family used in ControlLogix redundancy configurations. It provides the physical optical connection required by supported redundancy modules.\u003c\/p\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary chassis:\u003c\/strong\u003e Houses the primary controller and its compatible redundancy module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary chassis:\u003c\/strong\u003e Houses the partner controller and corresponding redundancy module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRedundancy link:\u003c\/strong\u003e Connects the supported modules through the specified fiber-optic interface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem validation:\u003c\/strong\u003e Confirms cable seating, module status, and redundancy synchronization after installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eThis cable does not independently create a redundant controller system. The chassis, controllers, redundancy modules, firmware, and application configuration must also meet system requirements.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eCompatibility Matrix | Select the Correct Assembly\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eDevice or Component\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eSelection Check\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1756-RM2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eControlLogix redundancy module\u003c\/td\u003e\n\u003ctd\u003eVerify the required cable type and module revision.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1756-RM2K\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eControlLogix redundancy configuration\u003c\/td\u003e\n\u003ctd\u003eConfirm the exact supported connection and installation requirements.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1756-RM2XT\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eControlLogix extreme-environment redundancy configuration\u003c\/td\u003e\n\u003ctd\u003eCheck the approved module and cable combination for the operating environment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePaired ControlLogix chassis\u003c\/td\u003e\n\u003ctd\u003eRedundant controller architecture\u003c\/td\u003e\n\u003ctd\u003eVerify the complete redundancy design and cable routing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Physical connector fit alone does not establish system compatibility. Confirm the required cable part number for the exact module pair before ordering.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eInstallation Method | Protect the Optical Link\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect first:\u003c\/strong\u003e Check the cable jacket, connectors, protective caps, and contact surfaces before installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm orientation:\u003c\/strong\u003e Follow the module manufacturer's instructions for connector placement and cable routing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvoid sharp bends:\u003c\/strong\u003e Maintain the specified bend radius throughout the installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect the route:\u003c\/strong\u003e Keep the cable away from sharp edges, moving machinery, crushing points, and abrasive surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManage contamination:\u003c\/strong\u003e Keep optical connector surfaces clean and capped when disconnected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure the run:\u003c\/strong\u003e Prevent tension or vibration from pulling on the connectors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparate redundant paths:\u003c\/strong\u003e Where the design provides separate cable routes, reduce the risk of one physical event damaging both paths.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValidate operation:\u003c\/strong\u003e Check redundancy module indicators and system status after reconnecting the cable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eUse the manufacturer's approved handling procedures. Never force a connector into position or use the cable to support the weight of other wiring.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eDiagnostic Value | Fault Isolation in Redundant Systems\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe cable is a passive interconnection component. It does not generate diagnostic reports or provide an independent alarm output.\u003c\/p\u003e\n\n\u003cp\u003eHowever, its condition can affect redundancy communication and system availability. Engineers can use module diagnostics and physical inspection to isolate potential link faults.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLink communication fault:\u003c\/strong\u003e Check connector seating, cable damage, and module status indicators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntermittent redundancy status:\u003c\/strong\u003e Inspect routing for excessive bending, vibration, tension, or connector movement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnexpected synchronization behavior:\u003c\/strong\u003e Review module diagnostics, firmware compatibility, and the complete redundancy configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuspected optical damage:\u003c\/strong\u003e Follow approved testing procedures and replace the cable with a verified compatible assembly when necessary.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecurring faults:\u003c\/strong\u003e Review cable routing and environmental exposure rather than repeatedly reseating the same connection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eField note:\u003c\/strong\u003e A redundancy warning does not prove that the cable has failed. Engineers should review module status and system logs before replacing components.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eApplications | Typical Equipment and Industries\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous process control:\u003c\/strong\u003e Redundant controller installations in chemical and petrochemical facilities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower and utilities:\u003c\/strong\u003e Control systems that require supported controller redundancy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil and gas:\u003c\/strong\u003e Process automation cabinets with paired ControlLogix chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing lines:\u003c\/strong\u003e Control architectures designed to reduce interruption after a supported controller-side fault.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInfrastructure automation:\u003c\/strong\u003e Compatible supervisory and process control systems that use ControlLogix redundancy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial maintenance:\u003c\/strong\u003e Planned replacement of a damaged or incorrectly sized redundancy connector cable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eActual availability benefits depend on the complete system design. A cable alone cannot guarantee uninterrupted operation or eliminate every single-point failure.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eGlobal PLC Spare HUB Review\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003eFor redundancy maintenance, cable selection should follow the installed module configuration rather than length alone. The \u003cstrong\u003e\u003cspan style=\"color: #C65D21;\"\u003e1756-RMC3\u003c\/span\u003e\u003c\/strong\u003e provides a 3-meter connection option for compatible ControlLogix redundancy modules.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePractical maintenance example:\u003c\/strong\u003e A plant technician finds a redundancy communication warning after maintenance work inside a control cabinet. The technician checks the connector seating, reviews the module indicators, and inspects the cable route for pinching or sharp bends. If the cable shows physical damage, the technician verifies the replacement part number before installing a new assembly.\u003c\/p\u003e\n\n\u003cp\u003eFor installations with limited cabinet space, measure the actual routing path before ordering. Include connector clearance and service access in the measurement. A cable that reaches the modules but remains under tension can create avoidable maintenance problems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOur recommendation:\u003c\/strong\u003e Confirm the module models, cable length, installation environment, and required connector configuration before placing an order. This reduces the risk of selecting a physically suitable but unsupported assembly.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eSelection and Maintenance FAQ\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ1: How should the required cable length be determined in a paired-chassis installation?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMeasure the planned cable route rather than the straight-line distance between modules. Allow suitable routing clearance without creating loops that can snag or become compressed. Confirm the available cable lengths in the manufacturer's product documentation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ2: What should be checked if a new cable does not restore redundancy status?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eCheck both module indicators and the controller system diagnostics. Confirm the module pairing, firmware requirements, connector seating, and cable part number. If the fault remains, follow the system troubleshooting procedure before replacing additional hardware.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ3: Can the cable be routed alongside moving machinery or through a high-traffic cable path?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eOnly use a route that protects the fiber assembly from crushing, abrasion, excessive bending, and repeated movement. Add suitable mechanical protection where the installation design requires it. Follow the manufacturer's cable-routing requirements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ4: What information should a purchasing team provide to avoid ordering the wrong redundancy cable?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eProvide the complete module part numbers, required cable length, installation environment, and quantity. A photograph of the existing label can support identification, but verify the part number against the technical documentation before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ5: Should a redundancy cable be replaced whenever a controller reports a communication warning?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eNo. First inspect the connectors and cable route, then review module diagnostics and system logs. Replace the cable when evidence indicates damage or a confirmed connection problem. This approach helps avoid unnecessary component changes and repeated commissioning work.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003ePackaging, Warranty and Shipping\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Allen-Bradley 1756-RMC3 fiber-optic redundancy connector cable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal cable length:\u003c\/strong\u003e 3 m.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Protective packaging for industrial electronic components; confirm the exact supplied accessories when ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccessories:\u003c\/strong\u003e Protective caps are described in the supplied product information. Confirm their inclusion with the seller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12 months, subject to the seller's written warranty terms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping carriers:\u003c\/strong\u003e FedEx, UPS, and DHL, subject to destination and service availability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch time:\u003c\/strong\u003e 24–48 hours after order confirmation, subject to stock availability and order processing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cb\u003eRequest a Quote | Verify Compatibility Before Ordering\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003eContact \u003cstrong\u003eGlobal PLC Spare HUB\u003c\/strong\u003e for pricing, stock availability, shipping arrangements, and compatibility checks for the \u003cstrong\u003e\u003cspan style=\"color: #C65D21;\"\u003e1756-RMC3\u003c\/span\u003e ControlLogix redundancy cable\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eInclude your required quantity, destination, and redundancy module part numbers. Our team can review the order details and help confirm the correct cable specification before shipment.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67651543564470,"sku":"1756-RMC3","price":104.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1756-RMC3-3.jpg?v=1792122027","url":"https:\/\/www.plcsparehub.com\/products\/1756-rmc3-allen-bradley-controllogix-fiber-optic-redundancy-cable","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}