Allen-Bradley 1768-ENBT – CompactLogix Ethernet Communication Module

The Allen-Bradley 1768-ENBT is a CompactLogix Ethernet communication module. Specifically, this module belongs to the 1768 CompactLogix product family. It enables a CompactLogix assembly to communicate with devices on an Ethernet/IP network. Furthermore, it features one Ethernet port supporting 10/100 Mbps communication. In addition, it supports both half-duplex and full-duplex with auto-negotiation capability. Consequently, this module suits applications requiring seamless integration with Ethernet/IP networks.

Ordering Configuration and Product Identification

• Module Type: Ethernet Communication Module.

• Manufacturer: Allen-Bradley / Rockwell Automation.

• Part Number: 1768-ENBT.

• Series: CompactLogix (Bulletin 1768).

• Integrated Ports: One (1) Ethernet port.

• Connector Type: RJ45.

• Cable Type: Category 5 or Category 6.

• Ethernet Speed: 10/100 Mbps with auto-negotiation.

• Topology: Linear topology supported.

• Mounting Type: DIN rail or panel mount.

• Mounting Location: 1768 CompactLogix assembly.

• UPC: 10612598307521.

• Form Factor: Single slot module.

• Therefore, the Allen-Bradley 1768-ENBT provides flexible mounting options and standard Ethernet connectivity.

Controller Compatibility and Instance Support

• Compatible Controller 1: 1768-L43 (CompactLogix PAC).

• Compatible Controller 2: 1768-L45 (CompactLogix PAC).

• Supported Instances (with 1768-L43): Two (2) modules maximum.

• Supported Instances (with 1768-L45): Four (4) modules maximum.

• Application: Inter-controller messaging functions.

• Network Integration: Exchanges data with SCADA systems and HMIs.

• Partner Controllers: Communicates with other controllers.

• Thus, the 1768-ENBT scales with the processor used in the system.

Connection Capacity and Protocols

• Maximum CIP Connections: 64 devices.

• Maximum Ethernet TCP/IP Connections: 32.

• Protocol: Common Industrial Protocol (CIP) over Ethernet.

• Network Type: Ethernet/IP.

• Auto-Negotiation: Yes, half-duplex or full-duplex.

• Legacy Device Support: Communicates with 1336 Drives, PowerFlex drives, and Bulletin 150 Smart Controllers.

• Third-party Devices: Supports communication with partner devices.

• Ethernet Switches: Compatible with commercial and industrial grade switches (e.g., Stratix).

• Consequently, the 1768-ENBT provides robust connectivity for diverse automation devices.

Power and Backplane Specifications

• Backplane Current: 834 mA at 5.2 V DC.

• Power Consumption: 4.34 Watts.

• Power Supply: From CompactLogix backplane.

• Isolation: Standard industrial isolation.

• Thermal Dissipation: Approximately 14.8 BTU per hour.

• Current Draw: Moderate for a communication module.

• Therefore, the Allen-Bradley 1768-ENBT consumes reasonable power from the backplane.

Temperature and Environmental Ratings

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

• Operating Vibration: 5 g at 10 to 500 Hz.

• Operating Shock: 30 g rating.

• Storage Temperature: Standard CompactLogix specifications.

• Relative Humidity: 5% to 95% non-condensing.

• Enclosure Type: Open-style (requires chassis installation).

• Mounting: DIN rail or panel mount.

• Industrial Environment: Suitable for typical manufacturing facilities.

• Moreover, the 1768-ENBT withstands typical industrial conditions reliably.

Status Indicators and Diagnostics

• Link Status Indicator: Shows Ethernet link activity.

• OK Status Indicator: Indicates module health.

• Network Status Indicator: Shows network connection status.

• Power Down Procedure: Wait until status indicator lights turn off.

• Data Protection: Saves any project still being written to memory.

• Troubleshooting: Quick visual diagnosis without software.

• Communication Status: Real-time network feedback.

• Thus, operators can easily monitor module and network status.

Installation Guide

First, verify that all system power sources are completely disconnected. Then, select an available slot in the 1768 CompactLogix assembly. The 1768-ENBT occupies a single slot. After that, slide the module into the chosen slot. Push firmly until the backplane connector is fully seated. Next, mount the assembly on DIN rail or a panel using the provided hardware. Then, connect the Ethernet cable using a Category 5 or Category 6 cable with RJ45 connectors. Connect the cable to the single Ethernet port on the module front. The port supports 10/100 Mbps with auto-negotiation. Then, apply power to the CompactLogix system. The module will perform a power-up sequence. The OK LED will indicate normal operation. For 1768-L43 systems, up to two modules are supported. For 1768-L45 systems, up to four modules are supported. Then, configure the Ethernet/IP network in your control program. Set up the IP address and communication parameters. Finally, test all network connections and communication paths. As a result, the Allen-Bradley 1768-ENBT will provide reliable Ethernet/IP connectivity.

Packaging List

• One Allen-Bradley 1768-ENBT Ethernet communication module

• One product identification label

• One installation and configuration guide

• One DIN rail mounting clip (attached)

• One panel mount bracket kit (included)

Common FAQs

Q1: What controllers are compatible with the Allen-Bradley 1768-ENBT?
A: This module is compatible with 1768-L43 and 1768-L45 CompactLogix PACs. Specifically, the 1768-L43 supports up to two modules. The 1768-L45 supports up to four modules. Therefore, system scalability depends on the processor used.

Q2: How many connections does the 1768-ENBT support?
A: This module supports up to 64 CIP connections. It also supports up to 32 Ethernet TCP/IP connections. Consequently, it suits medium to large Ethernet/IP networks.

Q3: What is the Ethernet speed of the Allen-Bradley 1768-ENBT?
A: This module supports 10/100 Mbps communication speed. It includes auto-negotiation capability for half-duplex or full-duplex. Therefore, it adapts to existing network infrastructure.

Q4: What cable type is recommended for the 1768-ENBT?
A: Category 5 or Category 6 cable is recommended. Connectors are RJ45 type on both ends. Therefore, standard Ethernet cables can be used for installation.

Q5: Can the Allen-Bradley 1768-ENBT communicate with legacy devices?
A: Yes, it communicates with legacy Allen-Bradley 1336 Drives and PowerFlex drives. It also works with Bulletin 150 Smart Controllers and Kinetix Servo Drives. Additionally, it supports third-party devices via Ethernet/IP protocol.