{"product_id":"1756-cnbr-controllogix-controlnet-bridge-series-d-brand-new","title":"1756-CNBR ControlLogix ControlNet Bridge Series D Brand New","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen Bradley 1756-CNBR\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as the high-speed communication link between a ControlLogix chassis and a ControlNet network. This\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emodule enables deterministic, repeatable data transfer for mission-critical I\/O and peer-to-peer interlocking. By utilizing dual BNC connectors, the 1756-CNBR supports redundant media operation, ensuring the network remains active even if one cable segment fails. It occupies any single slot within a 1756 ControlLogix chassis and provides a dedicated Network Access Port (NAP) for local programming and diagnostics.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 1756-CNBR delivers high-bandwidth performance with low power dissipation for efficient cabinet thermal management.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification Details\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel \/ Part Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1756-CNBR (Series D)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCommunication Rate\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 Mbps\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eConnectors\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 BNC (Redundant), 1 NAP (RJ-45 8-pin)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCable Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eQuad Shield RG-6 Coaxial\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.0 A @ 5.1V DC; 1.7 mA @ 24V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Dissipation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5.14 W\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eThermal Dissipation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e17.5 BTU\/hr\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eIsolation Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTransformer-based Ground Isolation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 60°C (32 to 140°F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eHumidity\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 to 95% (Non-condensing)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRedundant Media Support:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe dual BNC ports allow for two separate cable paths. If the primary cable experiences a break or signal degradation, the 1756-CNBR switches seamlessly to the redundant path without interrupting the process control or triggering a system halt.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTransformer-Coupled Isolation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIntegrated transformer isolation protects the internal ControlLogix backplane from ground loops and external electrical surges originating from the ControlNet coaxial network.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDeterministic I\/O Control:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUnlike standard Ethernet, the 1756-CNBR uses a scheduled communication protocol. This ensures that critical time-sensitive data arrives at precise intervals, making it ideal for high-speed motion and synchronized interlocking.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFlexible Slot Placement:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe module design supports installation in any available slot within the 1756 chassis. This flexibility allows engineers to optimize internal rack wiring and distribute thermal loads effectively.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between the 1756-CNB and the 1756-CNBR?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \"R\" in 1756-CNBR stands for Redundancy. While the standard 1756-CNB provides a single network connection, the 1756-CNBR features two BNC connectors to support redundant physical media. This architecture prevents a single cable failure from taking down the entire network node.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use standard RG-6 television cable for this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Allen Bradley requires Quad Shield RG-6 coaxial cable to meet industrial EMI\/RFI interference standards. Standard consumer-grade cable lacks the shielding density necessary to maintain 5 Mbps data integrity in electromagnetically dense industrial environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this 1756-CNBR module Series D compatible with older Series A or B chassis?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 1756-CNBR Series D maintains backward compatibility with the standard 1756 ControlLogix chassis line. However, always ensure your RSLogix 5000 or Studio 5000 software includes the correct Add-On Profile (AOP) for the Series D hardware to access all diagnostic features.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this unit ship in original factory packaging?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe guarantee this unit is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand arrives in the original Allen Bradley factory packing. It has never been installed or energized, ensuring the full 12-month factory warranty remains intact.\u003c\/p\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":43354065076314,"sku":"1756-CNBR","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/491._bb2dff41-4c41-4f56-9bec-0c1997cd0a92.jpg?v=1778575384","url":"https:\/\/www.spareoil.com\/products\/1756-cnbr-controllogix-controlnet-bridge-series-d-brand-new","provider":"SpareOil Automation","version":"1.0","type":"link"}