{"product_id":"allen-bradley-1756-en2t-c-ethernet-ip-communication-module","title":"Allen-Bradley 1756-EN2T\/C EtherNet\/IP Communication Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-EN2T\/C 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-EN2T\/C\u003c\/strong\u003e, also cataloged as the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-EN2T\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecommunication module, operates as a dedicated hardware component for EtherNet\/IP data routing and controller-to-network execution within ControlLogix chassis architectures. Configured for deterministic Ethernet communication in 1756 ControlLogix systems, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-EN2T\/C\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1756-EN2T\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecommunication module) provides direct backplane-mediated CIP messaging and dual-port Ethernet frame handling for real-time data exchange.\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-EN2T\/C\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\u003eUSA\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 x 35 mm x 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\u003e5 VDC backplane, ~1.0 A\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\u003e2 x RJ-45\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\u003eCIP Connections\u003c\/td\u003e\n\u003ctd\u003eUp to 128\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChassis Interface\u003c\/td\u003e\n\u003ctd\u003e1756 ControlLogix backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eControlLogix Backplane and EtherNet\/IP Deterministic Communication Behavior\u003c\/h3\u003e\n\u003cp\u003eThe module executes EtherNet\/IP cyclic and explicit messaging through the ControlLogix backplane bus, where communication scheduling is aligned with controller task execution cycles. The \/C hardware revision implements updated internal packet handling logic, affecting frame buffering and CIP connection arbitration behavior.\u003c\/p\u003e\n\u003cp\u003eBackplane communication is governed by slot-based bandwidth allocation, where module-to-CPU data transfer occurs through synchronized producer-consumer mechanisms. Dual RJ-45 ports support linear, star, and device-level ring topologies without external routing hardware.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1756-EN2T\/C support hot-swap insertion under chassis power?\u003cbr\u003eA: Yes. The module supports hot insertion and removal in a powered ControlLogix chassis. Backplane re-enumeration occurs after slot detection and initialization.\u003c\/p\u003e\n\u003cp\u003eQ: How does backplane current draw affect chassis configuration?\u003cbr\u003eA: The module draws approximately 1.0 A at 5 VDC from the chassis backplane. Total rack power budget must account for cumulative module loading across all installed slots.\u003c\/p\u003e\n\u003cp\u003eQ: Is CIP connection capacity affected by firmware revision differences?\u003cbr\u003eA: Yes. Firmware mismatch between controller and communication module may reduce available CIP connections or prevent explicit messaging session establishment.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInsert the module into a compatible 1756 ControlLogix chassis slot with proper alignment to the backplane connector. Ensure full seating to guarantee electrical continuity and signal integrity. Use shielded twisted-pair Ethernet cabling with controlled grounding at the switch-side reference point. Maintain separation between Ethernet wiring and high-voltage conductors to minimize electromagnetic coupling. Configure IP parameters through BOOTP\/DHCP or controller-based network configuration prior to runtime operation.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43581720821850,"sku":"1756-EN2T\/C","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-EN2TB1.jpg?v=1782971952","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-en2t-c-ethernet-ip-communication-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}