{"product_id":"1756-rm2-redundancy-controller-module-allen-bradley-controllogix","title":"1756-RM2 Redundancy Controller Module Allen-Bradley ControlLogix","description":"\u003ch3\u003eEngineering Overview \u0026amp; System Architecture\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e**1756-RM2**\u003c\/span\u003e is an advanced enhanced redundancy module engineered for the \u003cspan style=\"color: #0056b3;\"\u003e**ControlLogix**\u003c\/span\u003e platform by \u003cspan style=\"color: #0056b3;\"\u003e**Allen-Bradley**\u003c\/span\u003e (Rockwell Automation). Designed to eliminate single points of failure in critical industrial environments, the \u003cspan style=\"color: #0056b3;\"\u003e**1756-RM2**\u003c\/span\u003e pairs two independent chassis to achieve seamless controller failover and high-speed memory synchronization.\u003c\/p\u003e\n\u003ch3\u003eCore Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Specification Detail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer \u0026amp; Brand\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation \/ Allen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Series \u0026amp; Type\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e**\u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1756-controllogix\"\u003eControlLogix\u003c\/a\u003e**\u003c\/span\u003e Enhanced Redundancy Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Catalog Number\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e**1756-RM2**\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Synchronization Speed\u003c\/td\u003e\n\u003ctd\u003eUp to 1000 Mbps (1 Gbps)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController Switchover Time\u003c\/td\u003e\n\u003ctd\u003eApproximately 20 milliseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Draw\u003c\/td\u003e\n\u003ctd\u003e1.16 A @ 5.1 VDC and 3.4 mA @ 24 VDC (6W max power)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Optic Interface\u003c\/td\u003e\n\u003ctd\u003eLC-type connectors for 8.5\/125 micron single-mode fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Transmission Distance\u003c\/td\u003e\n\u003ctd\u003eUp to 10 kilometers between redundant racks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOperational Modes \u0026amp; System Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupported Controllers:\u003c\/strong\u003e Fully compatible with ControlLogix 5560 and 5570 series controllers (optimized for Logix 5570 L7x processors).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommunication Accommodations:\u003c\/strong\u003e Supports up to seven enhanced ControlNet and EtherNet\/IP communication modules per chassis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterlink Cabling Options:\u003c\/strong\u003e Connects via dedicated fiber optic patch cables including 1756-RMC1 (1m), 1756-RMC3 (3m), and 1756-RMC10 (10m).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Footprint:\u003c\/strong\u003e Occupies exactly a single slot in any standard ControlLogix rack without blocking adjacent system cards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Guidelines \u0026amp; Commissioning Convenience\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall identical controller models with matching firmware revisions in both primary and secondary redundant chassis pairs.\u003c\/li\u003e\n\u003cli\u003eMount the \u003cspan style=\"color: #0056b3;\"\u003e**1756-RM2**\u003c\/span\u003e module into any available slot within each ControlLogix chassis.\u003c\/li\u003e\n\u003cli\u003eRoute local I\/O, intelligent instruments, and specialty partner cards to third-tier or higher remote I\/O racks to maintain redundancy integrity.\u003c\/li\u003e\n\u003cli\u003eConnect matching LC-type single-mode fiber cables between the redundancy modules to establish high-speed cross-loading links.\u003c\/li\u003e\n\u003cli\u003eConfigure synchronization parameters using RSLinx software tool utilities before initializing primary-to-secondary switchover tests.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDiagnostic Capabilities \u0026amp; Industrial Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterference-Free Diagnostics:\u003c\/strong\u003e Built-in health monitoring provides real-time status reporting without degrading backplane processing scans.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Performance:\u003c\/strong\u003e Maintains structural stability with a maximum thermal dissipation rate of 21 BTU\/hr under full operating loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget Applications:\u003c\/strong\u003e Deployed in mission-critical oil and gas pipelines, continuous chemical distillation units, power generation boiler controls, and water purification facilities.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlobal PLC Spare HUB's Insight\u003c\/h3\u003e\n\u003cp\u003eEngineers deploying high-availability architectures with the \u003cspan style=\"color: #0056b3;\"\u003e**1756-RM2**\u003c\/span\u003e often experience synchronization faults if mismatched firmware revisions are flashed onto the redundant 5570 controllers. During a recent offshore platform migration, our engineering team resolved persistent cross-load timeout errors by enforcing strict binary revision parity across both primary and secondary processor nodes before linking the fiber channels.\u003c\/p\u003e\n\u003ch3\u003eLogistics, Packaging \u0026amp; Warranty Terms\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Inclusion:\u003c\/strong\u003e 1x \u003cspan style=\"color: #0056b3;\"\u003e**1756-RM2**\u003c\/span\u003e ControlLogix Enhanced Redundancy Module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFulfillment Schedule:\u003c\/strong\u003e Fast 24 to 48-hour order processing and dispatch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Couriers:\u003c\/strong\u003e Secure worldwide delivery handled via FedEx, UPS, and DHL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty Assurance:\u003c\/strong\u003e Fully protected by a comprehensive 12-month operational warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ) \u0026amp; Buying Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum distance supported between two redundant chassis using this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The module supports fiber optic link distances of up to 10 kilometers, though placing the redundant chassis pair in close physical proximity is recommended for optimal latency.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I install standard I\/O modules directly inside the primary and secondary redundant chassis?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No, local I\/O modules, intelligent cards, and encompass partner modules cannot reside in the primary or secondary redundant chassis pair; they must be offloaded to third-order or higher remote racks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What happens to the process scan time during an active controller switchover?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: While the processing chassis remains fully synchronized, the system scan time may experience a minor transient delay of up to 10 milliseconds during the switchover event.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does mixing module series affect the maximum data synchronization speed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Pairing identical \u003cspan style=\"color: #0056b3;\"\u003e**1756-RM2**\u003c\/span\u003e modules achieves the maximum 1000 Mbps speed, whereas combining mixed Series A and Series B units throttles synchronization down to 100 Mbps.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Buying Guide: When should I choose the 1756-RMC10 cable over shorter options?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Select the 10-meter 1756-RMC10 cable if your redundant control cabinets are installed in separate physical enclosures or require routing flexibility across extended panel raceways.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013810544822,"sku":"1756-RM2","price":230.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1756-RM2-3.jpg?v=1788938892","url":"https:\/\/www.plcsparehub.com\/products\/1756-rm2-redundancy-controller-module-allen-bradley-controllogix","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}