1756-EN2TK | Allen-Bradley | ControlLogix EtherNet/IP Module Conformal Coated

Overview

The 1756-EN2TK (1756-EN2TK) is a high-performance EtherNet/IP™ communication interface designed for the ControlLogix® platform. The "K" suffix designates this as a conformal-coated module, providing enhanced resistance against harsh environmental factors such as moisture, dust, and chemical contaminants. This module supports high-speed data exchange, bridging, and routing between EtherNet/IP networks and the ControlLogix backplane, making it a critical component for distributed I/O, HMI connectivity, and controller-to-controller interlocking.

Detailed Technical Specifications

• Network Speed: 10/100 Mbps (Auto-negotiating)

• Backplane Current (5.1V DC): 1.0 Amp

• Backplane Current (24V DC): 3 mA

• Peak Power Dissipation: 5.1 Watts

• Thermal Output: 21.28 BTU per hour

• Maximum Ethernet Connections: 256 (Logix) or 128 (TCP)

• CIP Unconnected Messages: 64–128 (System dependent)

• Isolation Voltage: 30 Volts (continuous), Basic Insulation Type, tested at 500V AC for 60 seconds

• Slot Requirements: Single slot (occupies any available slot in 1756 chassis)

• Environmental Protection: Conformal Coated (K-version) for noxious atmospheres

• Operating Temperature: 0 to 60 °C (32 to 140 °F)

• Physical Weight: 1.06 lbs (0.48 kg)

Network Integration and Reliability

The 1756-EN2TK (1756-EN2TK) is optimized for high-demand architectures where system uptime is paramount. It supports a wide array of industrial protocols, including messaging, producer/consumer tags, and distributed I/O control. By utilizing its advanced bridging capabilities, users can access devices on the Ethernet network from ControlNet or DeviceNet via the ControlLogix backplane without the need for additional gateways.

Engineering FAQ

• What is the advantage of the "K" version over the standard module?The 1756-EN2TK (1756-EN2TK) includes a protective conformal coating on the internal circuitry. This is essential for applications in wastewater treatment, oil and gas, or chemical plants where airborne corrosives could otherwise damage standard electronics.

• Does this module support Device Level Ring (DLR) topologies?Unlike the 1756-EN2TR, the 1756-EN2TK (1756-EN2TK) has a single RJ45 port and does not natively support DLR ring configurations. It is intended for star or linear topologies unless used in conjunction with an external tap.

• Can this module handle motion control applications?Yes, it is fully compatible with Integrated Motion on the EtherNet/IP network, supporting high-precision axis synchronization for Kinetix drives.