Product Overview

The Allen-Bradley 1783-ETAP2F (Rev A)​ is a Stratix 2000-series unmanaged 3-port Ethernet/IP tap designed to insert non-DLR-capable Ethernet devices into an ODVA Device Level Ring (DLR) network without breaking the ring’s redundant topology. DLR is the industrial Ethernet standard for ring redundancy in Rockwell automation ecosystems, delivering <300 ms ring-heal time if a single cable or node fails — common across CompactLogix/ControlLogix hosts, PowerFlex 520/750 VFDs, and PanelView Plus 7 HMIs. The challenge arises when a legacy device (dot-matrix printer, SCADA PC, barcode scanner, non-DLR VFD) needs to join the DLR ring but doesn’t support DLR natively; the 1783-ETAP2F​ solves this by acting as a DLR-participant node; its two 10/100Base-TX RJ45 ports pass DLR signaling through the ring, while its third port — a 100Base-FX multimode SC duplex fiber port — connects to the non-DLR device. The “F” suffix specifically targets long-reach or high-EMI runs: fiber extends to 2 km (vs. 100 m copper limit) and rejects electrical noise from VFDs, welders, or motor ducts.Unmanaged and zero-configuration, the 1783-ETAP2F​ requires no IP address, no web interface, and no Studio 5000 setup — insert the ring ports into the existing DLR, connect the fiber tap to the target device, and the tap auto-joins the ring as a compliant ODVA node. Power comes from a 12–48V DC redundant 2-terminal input (24V DC panel supply is typical), DIN-rail mount, 0–60°C operating range, and cUL Class I Div 2 / CE / KC / ABS Marine certifications make it suitable for harsh-floor, hazardous-area, and marine-adjacent DLR deployments. The Rev A (1783-ETAP2F/A) is the base revision, mechanically and logically interchangeable with later B/C revisions in any Rockwell DLR ring. While Rockwell positions the newer Stratix 5700 for larger managed DLR networks, the 1783-ETAP2F​ remains the volume MRO/low-complexity choice for adding a single fiber-tapped non-DLR node to an existing DLR ring without touching the host controller’s config.

Technical Specifications

Main Features and Advantages

Zero-Config DLR InsertionThe core value of the 1783-ETAP2F​ is that it adds a non-DLR device to a DLR ring with zero programming. No IP assignment, no web GUI login, no Studio 5000 changes to the host controller — the tap’s RJ45 ring ports auto-negotiate DLR participation, and the fiber tap port passes all Ethernet/IP traffic transparently. The DLR ring’s <300 ms heal time is unaffected, and the 1783-ETAP2F​ counts as only 1 node against ODVA’s 50-node/ring limit. For maintenance teams sustaining a 2015-vintage DLR line, this means a failed tap swaps in <5 minutes with no downtime for recommissioning.Fiber Tap Port for Tough EnvironmentsThe “F” in 1783-ETAP2F​ is the differentiator versus the all-copper 1783-ETAP sibling: 100Base-FX multimode SC fiber supports 62.5/125 or 50/125 µm cable up to 2 km, versus the 100 m hard limit of copper. This matters in two common scenarios: first, running from the main DLR panel to a remote batch printer or SCADA PC across a large machine cell (e.g., 150 m filler-room run); second, routing past high-EMI equipment (VFD line ducts, spot welders, servo power feeds) where copper would pick up noise and corrupt Ethernet frames. The fiber tap on the 1783-ETAP2F​ shrugs off both distance and EMI limits.Redundant Wide-Range PowerThe 1783-ETAP2F​ accepts 12–48V DC at the 2-terminal power block, so it ties directly to a panel’s 24V DC control supply without a buck/boost converter. Redundant wiring is supported (A/B 24V DC feeds from separate UPS channels), and reverse-polarity protection prevents damage if field wiring flips +/−. No separate power supply module is needed — the tap sips ~3W typical, well within most panel 24V DC budgets.Industrial Diagnostics & DurabilityFront-panel LEDs cover power, ring-port link/activity, DLR ring health (solid green = closed healthy ring; flashing = healing; red = fault), and tap-port link/activity. A floor tech can glance at the 1783-ETAP2F​ and confirm ring status without a laptop. The unit is fanless, DIN-rail clip, 45 mm width (narrow, fits between VFDs and I/O blocks), and carries Class I Div 2 listing for oil/gas/chemical DLR skids where a generic unmanaged switch wouldn’t clear hazardous-area paperwork.Full ODVA DLR Backwards CompatibilityThe 1783-ETAP2F/A​ works with every DLR-capable Rockwell host: CompactLogix 5370/5380/5069, ControlLogix 5580 with 1756-EN2TR, PowerFlex 520/750, PanelView Plus 7, and even 3rd-party ODVA DLR devices. No firmware pairing is required — the DLR protocol is standards-based, so the 1783-ETAP2F​ drops into a 2014-vintage 5370 ring as happily as a 2024 5380 ring.