Configured for high-capacity Ethernet/IP communication protocols within industrial automation control systems, the Allen-Bradley 1756-EN2TK (1756EN2TK COMMUNICATION MODULE) provides direct physical/electrical execution across backplane interfaces.

Model Identification and Suffix Architecture

• 1756-EN2TK: Standard catalog base model incorporating conformal coating protection for corrosive industrial atmospheres.
• 1756EN2TK: Spare part designation utilizing identical physical and electrical hardware footprints without software licensing variations.
• TP: Factory-designated terminal designation indicating high-capacity network access point framework and USB port integration.

Hardware Specifications

Industrial Network Integration and Deterministic Performance

The module executes deterministic network communication across ControlLogix racks via 128 simultaneous TCP/IP and CIP connection pathways. Firmware flash compatibility ensures seamless backplane communication velocity updates without physical hardware replacement. EtherNet/IP deterministic networks rely on dual-port configurations supporting Device-Level Ring (DLR) topologies to mitigate single-point cable failures while maintaining packet priority queues for real-time control data exchange.

Package Ordering Information

• 1 x Allen-Bradley 1756-EN2TK Communication Module hardware unit
• 1 x Integrated USB Configuration Port cover and protective terminal guard
• 1 x Conformal Coated PCB assembly hardware package

Mechanical Setup and Grounding Guidelines

• Mounting Position: Install exclusively in standard ControlLogix chassis backplane slots, avoiding power supply adjacent slots to limit electromagnetic interference.
• Chassis Grounding: Secure the module mounting screw directly to the grounded metal enclosure using low-impedance copper bonding straps.
• Cable Shielding: Terminate industrial-grade Cat5e/Cat6 STP cable shields to the DIN rail grounding clips prior to transceiver insertion.
• Thermal Clearance: Maintain a minimum clearance of 50 mm above and below the rack assembly to facilitate passive convection cooling across the conformal-coated housing.

Frequently Asked Questions

• Does this module support hot-insertion and removal under power?
  • Yes, the 1756-EN2TK supports Removal and Insertion Under Power (RIUP) within an active ControlLogix chassis without interrupting backplane operations.
• What is the purpose of the conformal coating designation (T)?
  • The conformal coating protects internal circuitry against airborne contaminants, moisture, and corrosive gases typically found in harsh industrial processing environments.
• How many maximum Ethernet nodes can be configured on this module?
  • The unit supports up to 128 active EtherNet/IP connections for controllers, drives, and remote I/O drops.
• Can the USB port be used for routine PLC ladder logic programming?
  • Yes, the front-panel USB port provides temporary direct access for configuration, firmware flashing, and diagnostics via RSLinx software.
• What backplane power supply load should be calculated for system design?
  • Account for 1.1 A at 5 VDC and 1 mA at 24 VDC when sizing the rack power supply capacity.
• Is external power required for the Ethernet communication ports?
  • No, all operational power is derived internally from the ControlLogix chassis backplane bus.
• What is the maximum supported cable length per Ethernet segment?
  • Standard copper Ethernet segments adhere to IEEE 802.3 limits, restricting individual segment runs to 100 meters between active switches.
• How are firmware updates applied to this communication module?
  • Firmware revisions are flashed via ControlFLASH utility software using either the front USB port or an active network connection.