{"product_id":"allen-bradley-1756-en27-controllogix-ethernet-ip-bridge-module","title":"Allen-Bradley 1756-EN27 ControlLogix EtherNet\/IP Bridge Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-EN27 ControlLogix EtherNet\/IP Bridge Module\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eConfigured for real-time industrial Ethernet communication in ControlLogix architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-EN27\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1756-EN27\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEtherNet\/IP Bridge Module) provides direct backplane-to-network data exchange between ControlLogix controllers and EtherNet\/IP nodes. The module executes deterministic CIP messaging through dual RJ-45 interfaces and interfaces with the 1756 chassis backplane for cyclic and explicit data handling.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe 1756-EN27 is a single-order ControlLogix communication module without documented suffix segmentation. No functional sub-variants or field-selectable model branches are defined in the provided specification. All operational behavior is fixed at firmware and backplane configuration level within the ControlLogix system.\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-EN27\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\/1000 Mbps auto-negotiation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCIP Connections\u003c\/td\u003e\n\u003ctd\u003eUp to 256\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 EtherNet\/IP Backplane Communication Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe module integrates into the ControlLogix backplane bus architecture, where cyclic I\/O updates and explicit messaging are scheduled via chassis arbitration. EtherNet\/IP frame handling is synchronized through firmware-level task execution linked to controller scan cycles. Dual-port architecture supports line, star, and ring topologies without external bridging logic.\u003c\/p\u003e\n\u003cp\u003eBackplane throughput is constrained by 5 VDC current draw profile and chassis slot arbitration timing. CIP object routing is executed through the module’s embedded network stack with deterministic packet handling aligned to ControlLogix task scheduling.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1756-EN27 support hot-swap replacement under chassis power?\u003cbr\u003eA: Yes, the module supports hot-swap insertion and removal in a powered 1756 ControlLogix chassis. Backplane re-enumeration occurs after slot re-detection.\u003c\/p\u003e\n\u003cp\u003eQ: What is the effect of backplane current draw on chassis loading?\u003cbr\u003eA: The module draws approximately 1.0 A at 5 VDC from the backplane. Total chassis power budget must account for cumulative slot loading.\u003c\/p\u003e\n\u003cp\u003eQ: Can firmware mismatch affect EtherNet\/IP communication stability?\u003cbr\u003eA: Yes, controller and module firmware mismatch may cause CIP connection rejection or reduced connection allocation capacity.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInsert the module into an available 1756 ControlLogix chassis slot with power removed or per hot-swap procedure. Ensure backplane connector alignment before full seating. Use shielded Ethernet cabling with proper grounding at the switch or control cabinet earth reference. Maintain separation between Ethernet and high-voltage conductors to reduce induced noise coupling. Configure IP addressing through controller or BOOTP\/DHCP tool prior to runtime commissioning.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43581681401946,"sku":"1756-EN27","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-EN272.jpg?v=1782971596","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-en27-controllogix-ethernet-ip-bridge-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}