{"product_id":"allen-bradley-1756-en2tk-ethernet-ip-communication-module","title":"Allen-Bradley 1756-EN2TK EtherNet\/IP Communication Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-EN2TK EtherNet\/IP Communication Module\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eConfigured for secure high-speed controller-to-network data exchange in ControlLogix chassis systems, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-EN2TK\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1756-EN2T\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecommunication module) provides direct physical and protocol-level execution for EtherNet\/IP CIP traffic with integrated security enforcement, including encrypted session handling and authenticated communication within industrial Ethernet networks.\u003c\/p\u003e\n\u003cp\u003eThe module implements deterministic CIP messaging across Ethernet backplane routing paths, with security extensions applied at session establishment and data transport layers.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eThe base identifier\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-EN2T\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edefines the EtherNet\/IP communication architecture. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eK suffix\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eindicates a security-enhanced hardware revision incorporating CIP Security capabilities, TLS-based session encryption, and authentication enforcement. No additional functional segmentation beyond revision-level security extension is defined.\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-EN2TK\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\u003e~1.0 A at 5 VDC (backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Type\u003c\/td\u003e\n\u003ctd\u003eEtherNet\/IP (secure)\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\u003eSecurity Features\u003c\/td\u003e\n\u003ctd\u003eCIP Security, TLS encryption, authentication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eControlLogix Backplane Communication \u0026amp; CIP Security Execution Layer\u003c\/h3\u003e\n\u003cp\u003eThe module operates through the 1756 backplane arbitration system, where chassis slot scheduling governs cyclic data exchange timing. EtherNet\/IP implicit messaging is executed via CIP objects with secure session encapsulation when enabled.\u003c\/p\u003e\n\u003cp\u003eCIP Security enforces identity validation using certificate-based authentication prior to session activation. TLS encryption is applied to payload transport, increasing frame processing overhead relative to non-secure EN2T variants. Firmware compatibility must align with both controller revision and security policy set. Backplane bus communication velocity is dependent on chassis power distribution and slot scan allocation. I\/O density scaling is limited by simultaneous secure session capacity under encryption overhead conditions.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1756-EN2TK support hot-swap in an active ControlLogix chassis?\u003cbr\u003eA: Yes. The module supports hot-swap insertion and removal. Secure CIP sessions terminate and reinitialize after reinsertion.\u003c\/p\u003e\n\u003cp\u003eQ: Does enabling CIP Security affect CIP connection capacity?\u003cbr\u003eA: Yes. Encrypted sessions introduce additional handshake and encryption overhead, reducing effective connection throughput under maximum load.\u003c\/p\u003e\n\u003cp\u003eQ: Is firmware alignment required for secure communication operation?\u003cbr\u003eA: Yes. CIP Security requires matched firmware versions across controller, module, and certificate policy configuration.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the module into a compatible 1756 ControlLogix chassis with power removed when possible. Ensure full seating on the backplane connector to maintain stable electrical and communication alignment. Configure security certificates before enabling CIP Security traffic. Use shielded twisted-pair Ethernet cabling and maintain proper chassis grounding to reduce EMI coupling on RJ-45 interfaces. Route Ethernet cables separately from high-voltage conductors. Verify IP addressing, security policy configuration, and firmware compatibility prior to commissioning.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43581777051738,"sku":"1756-EN2TK","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-EN2TK2.jpg?v=1782973246","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-en2tk-ethernet-ip-communication-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}