{"product_id":"allen-bradley-1756-rm2xt-controllogix-redundancy-module","title":"Allen-Bradley 1756-RM2XT ControlLogix Redundancy Module","description":"\u003ch2\u003eAllen-Bradley 1756-RM2XT ControlLogix Redundancy Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for controller synchronization and failover execution in ControlLogix redundant chassis systems, the \u003cstrong\u003eAllen-Bradley 1756-RM2XT\u003c\/strong\u003e (\u003cstrong\u003e1756-RM2XT\u003c\/strong\u003e Redundancy Module) provides direct physical and data communication execution. The module links paired controllers through a fiber optic redundancy connection and manages chassis synchronization status.\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\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-RM2XT\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\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eControlLogix Enhanced Redundancy Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController Redundancy\u003c\/td\u003e\n\u003ctd\u003eSupports two identical controllers in redundant chassis configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Link\u003c\/td\u003e\n\u003ctd\u003e1 Gbps fiber optic link\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eLC fiber optic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy Cable Compatibility\u003c\/td\u003e\n\u003ctd\u003e1756-RMC1, 1756-RMC3, 1756-RMC10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e1 redundancy communication channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Length\u003c\/td\u003e\n\u003ctd\u003e4 km\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\u003eCurrent Draw\u003c\/td\u003e\n\u003ctd\u003e4 mA @ 1.2 VDC, 1.2 A @ 5.1 VDC, 120 mA @ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e9 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e31 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.64 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e5.51 x 4.41 x 5.71 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity\u003c\/td\u003e\n\u003ctd\u003e5-95% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eOpen-style, no enclosure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Chassis\u003c\/td\u003e\n\u003ctd\u003e1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e9 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eControlLogix Redundancy Communication and Network Execution\u003c\/h3\u003e\n\u003cp\u003eThe 1756-RM2XT operates as a ControlLogix redundancy interface module using fiber optic communication between redundant chassis. The module maintains controller synchronization data, redundancy status information, and failover coordination through the redundancy link.\u003c\/p\u003e\n\u003cp\u003eThe Allen-Bradley ControlLogix platform uses deterministic backplane bus communication for controller and I\/O coordination. The module supports redundancy configurations requiring synchronized controller states and firmware-compatible module operation. Fiber optic communication provides electrical isolation between redundant chassis connections.\u003c\/p\u003e\n\u003ch3\u003eFirmware and Backplane Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe 1756-RM2XT integrates with ControlLogix redundancy architectures through compatible chassis, power supplies, and controller firmware combinations. System configuration requires matching redundancy modules, controllers, and firmware revisions within the same redundant pair.\u003c\/p\u003e\n\u003cp\u003eThe module provides PRI, COM, and OK LED indicators for redundancy status monitoring. Diagnostics include communication link state monitoring and synchronization condition indication.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What type of communication connection is used between redundant chassis?\u003cbr\u003eA: The 1756-RM2XT uses an LC fiber optic connection for redundancy communication between paired ControlLogix chassis.\u003c\/p\u003e\n\u003cp\u003eQ: What power loading does the module place on the chassis backplane?\u003cbr\u003eA: The module requires 1.2 A at 5.1 VDC, 120 mA at 24 VDC, and 4 mA at 1.2 VDC according to the specified electrical ratings.\u003c\/p\u003e\n\u003cp\u003eQ: Can the 1756-RM2XT operate outside standard temperature ranges?\u003cbr\u003eA: The RM2XT version is specified for extended temperature operation from -40 deg C to +70 deg C.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1756-RM2XT in a compatible ControlLogix chassis slot according to the system redundancy configuration requirements. Verify controller firmware compatibility and install matching redundancy modules in both redundant chassis.\u003c\/p\u003e\n\u003cp\u003eRoute fiber optic cables separately from high-voltage power conductors and maintain proper bend radius according to cable specifications. Inspect LC connectors for contamination before connection and ensure protective caps are installed during storage.\u003c\/p\u003e\n\u003cp\u003eFor cabinet installation, maintain grounding continuity between chassis components and use appropriate cable segregation practices. Verify LED status indicators after power-up to confirm redundancy communication and synchronization states.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43627714642010,"sku":"1756-RM2XT","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-RM2XT2.jpg?v=1783670488","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-rm2xt-controllogix-redundancy-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}