Purchase 1783-ETAP now to enable Device Level Ring topologies
The Allen-Bradley 1783-ETAP is a highly specialized 3-port EtherNet/IP tap designed specifically to integrate single-port industrial devices into highly resilient linear or Device Level Ring (DLR) network topologies. By acting as a transparent network bridge, this compact hardware allows older or standard single-port devices—such as legacy PLCs, basic HMIs, or simple variable frequency drives—to participate in advanced networking architectures that require dual ports for continuous ring connectivity.
Technical Specifications
- Network Ports: Two (2) 10/100 Mbps Fast Ethernet RJ45 copper ports for ring connection.
- Device Port: One (1) 10/100 Mbps Fast Ethernet RJ45 copper port for local device connection.
- Input Voltage: Redundant 24V DC (10.8 to 27.6V DC acceptable range).
- Power Consumption: Maximum of 3.2 W.
- Time Synchronization: Supports CIP Sync and IEEE 1588 Precision Time Protocol (PTP).
- Operating Temperature: Rated for extreme industrial environments from -25°C to 60°C (-13°F to 140°F).
Comprehensive Technical Overview
In modern industrial automation, network downtime is unacceptable. The 1783-ETAP is the cornerstone of Rockwell Automation’s DLR architecture, allowing machine builders to create a continuous ring of network nodes. If a cable breaks or a node fails in a DLR network, the protocol automatically reroutes the traffic in the opposite direction within milliseconds (typically less than 3 ms for a 50-node ring). The 1783-ETAP makes this possible for devices that only possess a single physical network port. Furthermore, this tap fully supports CIP Sync (IEEE 1588). This is critical because it ensures that precision timing signals pass through the tap to the connected device without any latency or jitter, which is an absolute necessity for highly coordinated, multi-axis motion control applications over Ethernet.
Expert Installation Advice
When installing the 1783-ETAP, placement and power distribution are key. The device supports dual redundant power inputs. We strongly recommend wiring these inputs to two physically separate 24V DC power supplies within your control panel. In the event of a primary power supply failure, the tap will seamlessly draw power from the secondary source, ensuring the DLR network ring is not broken. Additionally, adhere strictly to the maximum cable length of 100 meters (328 feet) for any copper RJ45 connection to prevent signal degradation and intermittent packet loss.
Maintenance & Diagnostic Tips
The 1783-ETAP requires no routine mechanical maintenance, but technicians should familiarize themselves with its diagnostic interface. The device features integrated LED indicators for Link Status, Network Status, and Module Status. Moreover, it can be assigned its own IP address purely for diagnostic purposes, allowing you to monitor port statistics, packet collisions, and ring faults directly from your Studio 5000 Logix Designer software environment.
Frequently Asked Questions (FAQs)
Q: Does the 1783-ETAP require an IP address to function?
A: No, it can operate completely transparently out of the box without an IP address. However, assigning one is highly recommended to access its advanced diagnostic web pages and SNMP features.
Q: Can I use this tap on a standard star topology network?
A: Yes, while it is optimized for DLR and linear topologies, it functions perfectly well as a standard unmanaged 3-port switch in a star topology.
Series Continuity & System Integration
If your network architecture must traverse high EMI (Electromagnetic Interference) areas or cover distances exceeding 100 meters, you must transition to fiber optics. We recommend integrating the 1783-ETAP1F (1 fiber port, 2 copper) or the 1783-ETAP2F (2 fiber ports, 1 copper) to bridge the gap flawlessly.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here.
