Allen-Bradley 1783-ETAP 3-Port EtherNet/IP Tap for DLR Networks

Brief Product Description

The Allen-Bradley 1783-ETAP is a compact 3-port EtherNet/IP tap designed to integrate non-switching industrial devices into high-availability linear and Device Level Ring (DLR) topologies. This module acts as a critical bridge, ensuring seamless high-speed communication and network redundancy across automated control systems.

Functional Overview

The 1783-ETAP serves as a specialized connectivity solution within the Rockwell Automation Stratix networking family. By providing three RJ45 copper ports, this device allows hardware that lacks an integrated switch to participate in advanced network structures like redundant rings. One port typically connects to the local device, while the remaining two ports link to the upstream and downstream neighbors in the network chain. This architecture effectively eliminates the requirement for centralized switches in localized machine cells, thereby reducing both cabling costs and the physical footprint within the control cabinet.

Technical Specifications

The following data highlights the mechanical and electrical parameters for the 1783-ETAP module:

• Manufacturer: Allen-Bradley / Rockwell Automation
• Model Number: 1783-ETAP
• Module Type: 3-Port EtherNet/IP Tap
• Port Configuration: 3 x 10/100 Base-T Copper Ports (RJ45)
• Input Voltage Range: 20.4–27.6V DC
• Power Consumption: 4.8 Watts (Maximum)
• Current Rating: 200 mA
• Network Topology Support: Linear, Star, and Device Level Ring (DLR)
• Data Rate: 100 Mbps (Full/Half Duplex)
• Dimensions: 15.5 x 14.0 x 10.7 cm
• Weight: 0.35 kg
• Country of Origin: USA

Network Resiliency and DLR Capability

The primary advantage of the 1783-ETAP lies in its native support for Device Level Ring (DLR) technology. In a DLR configuration, the module maintains constant data flow even if a single cable segment fails, providing the near-instantaneous recovery required for time-critical automation. Because the device functions as a “tap,” it introduces minimal latency into the network. Furthermore, maintenance teams can configure the module to act as a ring supervisor, which monitors the integrity of the loop and manages traffic redirection during a fault event. This level of resiliency proves indispensable for high-speed packaging, automotive assembly, and continuous process industries.

Industrial Application and Reliability

Rockwell Automation engineered the 1783-ETAP for the rigors of factory floor environments. Its low power dissipation helps prevent heat buildup in densely packed enclosures, while the rugged housing resists the mechanical stresses common in heavy industrial applications. Furthermore, the module facilitates the daisy-chaining of EtherNet/IP devices, which simplifies the expansion of existing systems without requiring a complete network redesign. Whether managing a small conveyor segment or a complex multi-stage production line, this tap delivers the stability and performance necessary for modern “Connected Enterprise” initiatives.