{"product_id":"allen-bradley-1756-en2tr-b-ethernet-ip-communication-module","title":"Allen-Bradley 1756-EN2TR\/B EtherNet\/IP Communication Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-EN2TR\/B EtherNet\/IP Communication Module\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-EN2TR\/B\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-EN2TR\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEtherNet\/IP communication module, operates as a dedicated hardware component for deterministic Ethernet\/IP data exchange and redundant controller synchronization within ControlLogix chassis systems. It provides direct physical and protocol-level execution of CIP messaging across dual-port Ethernet networks with redundancy-aware routing.\u003c\/p\u003e\n\u003cp\u003eConfigured for redundant controller communication and high-speed CIP data exchange in ControlLogix chassis networks, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-EN2TR\/B\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1756-EN2TR\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecommunication module) provides direct physical\/electrical execution across EtherNet\/IP infrastructures.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe base model\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-EN2TR\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edefines a redundant-capable EtherNet\/IP communication architecture for ControlLogix backplane integration. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e\/B revision\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ereflects updated hardware design with modified Ethernet PHY behavior and improved backplane timing tolerance. No additional functional segmentation is defined beyond revision-level hardware optimization.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\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-EN2TR\/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\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e145 mm × 35 mm × 140 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.0 A at 5 VDC (backplane draw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Type\u003c\/td\u003e\n\u003ctd\u003eEtherNet\/IP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003eDual RJ-45 Ethernet ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed\u003c\/td\u003e\n\u003ctd\u003e10\/100 Mbps auto-negotiation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnections Supported\u003c\/td\u003e\n\u003ctd\u003eUp to 128 CIP connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy Support\u003c\/td\u003e\n\u003ctd\u003eController redundancy enabled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eControlLogix Backplane Deterministic Communication \u0026amp; Redundancy Execution Layer\u003c\/h3\u003e\n\u003cp\u003eThe module interfaces with the ControlLogix backplane using slot-based arbitration and cyclic scan scheduling. EtherNet\/IP implicit messaging is executed through CIP objects with deterministic packet timing controlled by chassis scan intervals.\u003c\/p\u003e\n\u003cp\u003eIn redundant controller configurations, the module maintains synchronized communication state tables between primary and secondary controllers. Redundancy switchover is governed by chassis health monitoring and backplane state validation. CIP session continuity depends on synchronized connection instance replication across both controllers. Backplane bus communication velocity is constrained by chassis power distribution timing and slot scan allocation. Firmware compatibility must align across redundancy pairs to prevent session desynchronization during failover events.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1756-EN2TR\/B maintain CIP connections during redundancy switchover?\u003cbr\u003eA: CIP connections are re-established through the secondary controller after switchover. Session continuity depends on configuration and scan timing.\u003c\/p\u003e\n\u003cp\u003eQ: Can both Ethernet ports operate simultaneously in redundancy mode?\u003cbr\u003eA: Yes. Dual ports support network segmentation or ring\/linear topologies with independent traffic handling.\u003c\/p\u003e\n\u003cp\u003eQ: Does backplane loading change in redundant controller configurations?\u003cbr\u003eA: Yes. Redundancy increases cyclic synchronization traffic, raising backplane communication load during active synchronization cycles.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the module into a powered-down 1756 ControlLogix chassis whenever possible. Ensure full engagement with backplane connectors to maintain stable electrical contact. Maintain consistent firmware versions across redundant controllers and communication modules prior to commissioning. Use shielded Ethernet cabling and ensure proper chassis grounding to reduce EMI coupling on RJ-45 interfaces. Avoid routing Ethernet cables parallel to high-voltage conductors. Verify redundancy configuration, IP addressing, and network segmentation rules before enabling cyclic CIP traffic.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43581796450394,"sku":"1756-EN2TR\/B","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-EN2TRB2.jpg?v=1782973714","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-en2tr-b-ethernet-ip-communication-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}