{"product_id":"allen-bradley-1757-srm-b-controllogix-system-redundancy-module","title":"Allen-Bradley 1757-SRM\/B ControlLogix System Redundancy Module","description":"\u003ch2\u003eAllen-Bradley 1757-SRM\/B ControlLogix System Redundancy Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for controller synchronization and redundant processor coordination in ControlLogix platforms, the \u003cstrong\u003eAllen-Bradley 1757-SRM\/B\u003c\/strong\u003e (\u003cstrong\u003e1757-SRM\u003c\/strong\u003e System Redundancy Module) provides direct physical data communication between primary and secondary controller chassis through fiber optic links.\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\u003e1757-SRM\/B\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 System Redundancy Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eControlLogix 5570 and 5580 controller systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy Function\u003c\/td\u003e\n\u003ctd\u003eHot standby controller synchronization with bumpless transfer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eFiber optic synchronization via 1757-SRC cables\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Connector\u003c\/td\u003e\n\u003ctd\u003eSC fiber-optic connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Wavelength\u003c\/td\u003e\n\u003ctd\u003e1300 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Cables\u003c\/td\u003e\n\u003ctd\u003e1757-SRC1, SRC3, SRC10, SRC50, SRC100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current\u003c\/td\u003e\n\u003ctd\u003e800 mA @ 5 VDC, 5 mA @ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e11.28 W maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e38.49 BTU\/hr maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.45 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e14.5 x 7 x 14 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eStandard 1756 chassis slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicators\u003c\/td\u003e\n\u003ctd\u003eDiagnostic LEDs for module status, redundancy state, and faults\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eOpen-style module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConformal Coating\u003c\/td\u003e\n\u003ctd\u003eAvailable option for harsh environments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eEtherNet\/IP and ControlLogix Redundancy Synchronization\u003c\/h3\u003e\n\u003cp\u003eThe 1757-SRM\/B operates as the synchronization interface between redundant ControlLogix controller assemblies. The module transfers redundancy state information through dedicated fiber optic communication paths and maintains controller pairing status during operation.\u003c\/p\u003e\n\u003cp\u003eThe module supports hot standby configurations with Removal and Insertion Under Power (RIUP) capability when installed in a compatible ControlLogix chassis. Backplane communication is managed through the 1756 chassis infrastructure for module status exchange and diagnostic data handling.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What communication medium is used for synchronization between redundant controller chassis?\u003cbr\u003eA: The 1757-SRM\/B uses fiber optic synchronization communication through 1757-SRC series cables with SC connectors.\u003c\/p\u003e\n\u003cp\u003eQ: What are the backplane power requirements of the module?\u003cbr\u003eA: The module requires 800 mA from the 5 VDC backplane supply and 5 mA from the 24 VDC backplane supply.\u003c\/p\u003e\n\u003cp\u003eQ: Can the module be replaced while the ControlLogix chassis remains powered?\u003cbr\u003eA: The module supports RIUP operation when installed within a compatible ControlLogix chassis configuration.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the 1757-SRM\/B in an approved 1756 chassis slot with correct chassis grounding and power distribution practices. Verify that the fiber optic synchronization cables are installed with appropriate bend radius control and protected from mechanical stress.\u003c\/p\u003e\n\u003cp\u003eRoute fiber cables separately from high-current conductors and sources of electromagnetic interference. Maintain clean SC connector surfaces and use proper fiber handling procedures during installation or replacement.\u003c\/p\u003e\n\u003cp\u003eConfirm controller redundancy configuration through RSLogix 5000 software after installation. Verify diagnostic LED status, synchronization state, and controller communication before placing the redundant system into service.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43649706819674,"sku":"1757-SRM\/B","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1757-SRMB2.jpg?v=1783923275","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1757-srm-b-controllogix-system-redundancy-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}