Allen‑Bradley 1715-AENTR​ Redundant EtherNet/IP Adapter Module for ControlLogix 1715 High Availability I/O

Technical Specifications

Product Model | 1715-AENTRManufacturer | Rockwell Automation / Allen-BradleyProduct Type | Redundant EtherNet/IP Adapter Module for 1715 Redundant I/O SystemSeries | Allen-Bradley 1715 Redundant I/OEthernet Ports | 2 × 10/100BASE-TX RJ45, auto-negotiating, Auto-MDIXSupported Topology | Star, Linear (daisy-chain), Device Level Ring (DLR)Redundancy Modes | Simplex (single adapter) or Duplex (paired adapters – active/standby)Max I/O Modules per Adapter Pair | 24 × 1715-series I/O modulesRequired Base | 1715-A2A Adapter Base (sold separately)Power Supply Requirement | 18–32 V DC (nominal 24 V DC), Backplane current draw approx. 380 mA @ 24 V DCTypical Power Dissipation | 8 W maximumSafety Certification | IEC 61508 SIL 2 (TÜV certified when used with compatible 1715 safety I/O)Operating Temperature | -20 °C to +60 °C (-4 °F to +140 °F)Agency Approvals | CE, UL Listed, CSA, FM, ATEX/IECEx (where noted per region)Conformal Coating | Yes, as standard (Class 1, Div 2 / Zone 2 rated)

Main Features and Advantages

The primary strength of the Allen-Bradley 1715-AENTR​ lies in its true adapter-level redundancy. Unlike standard remote I/O adapters that rely solely on network path redundancy, the 1715 system allows two 1715-AENTR​ modules to be paired in a duplex configuration. Both adapters continuously monitor the network and each other; if the active adapter or its Ethernet path fails, the standby adapter assumes control transparently—the controller sees no loss of I/O data and the process experiences zero scan disruption. This dual-layer protection (network + adapter) is essential for critical process applications governed by API, NFPA, or IEC 61511 standards.Device Level Ring support on each Allen-Bradley 1715-AENTR​ further enhances network resilience. A broken cable or port failure in a DLR-enabled ring causes the network to re-converge in under 300 ms, preserving communications even in the outermost field locations. The module’s CIP™ Sync (IEEE 1588 v2) optional support also allows time-synchronized data acquisition across multiple adapter pairs when distributed timestamping is required.From an engineering standpoint, the Allen-Bradley 1715-AENTR​ reduces lifecycle cost through tight integration with Studio 5000 Logix Designer. Electronic keying prevents mismatched replacement parts, auto-discovery simplifies commissioning, and built-in web server pages provide real-time module status for maintenance technicians without special software. Mixed I/O types—discrete, analog, temperature, and safety—can coexist on the same 1715 backplane behind one adapter pair, keeping panel space compact.Remove and Insert Under Power (RIUP) capability means a faulty Allen-Bradley 1715-AENTR​ can be swapped live in a duplex pair; the standby adapter takes over during the brief removal window, and the replaced unit automatically synchronizes upon reinsertion. Combined with wide-temperature operation, conformal coating, and SIL 2 capability, the module offers a rare combination of process continuity, functional safety readiness, and ease of maintenance.

Application Field

The Allen-Bradley 1715-AENTR​ is purpose-designed for continuous-process industries where even momentary loss of I/O communications can result in significant safety incidents, environmental releases, or costly production outages. Typical deployments include offshore and onshore oil & gas production platforms, refinery process units (crude/distillation/coker), petrochemical plants, thermal and nuclear power generation auxiliaries, pulp & paper continuous digesters, and large-scale water/wastewater treatment facilities.In boiler control and turbine auxiliary systems, the Allen-Bradley 1715-AENTR​ provides the redundant communication link between field-mounted 1715 I/O racks—monitoring flame safeguard contacts, analog transmitter loops, and motor status—and the central ControlLogix controller. Emergency Shutdown (ESD) and Fire & Gas (F&G) systems leverage the SIL 2 certification of the 1715 platform, with the Allen-Bradley 1715-AENTR​ ensuring that the safety I/O remains reachable even during a primary network or adapter failure.For OEMs building skid-mounted process equipment (compressors, separators, injection packages), specifying the Allen-Bradley 1715-AENTR​ gives end-users the reassurance of redundant architecture while still integrating cleanly into their existing PlantPAx® or standard Logix control networks. Whether the requirement is high-availability process I/O, distributed remote monitoring across a large plant, or a certified safety-related I/O network, the Allen-Bradley 1715-AENTR​ delivers the deterministic, fault-tolerant EtherNet/IP connectivity expected in modern mission-critical automation systems.

Related Products

• 1715-A2A​ — Dedicated adapter base required to mount the 1715-AENTR; provides wiring terminals and backplane connection to 1715 I/O modules.
• 1715-IB8DE​ — 8-point 24 V DC digital input module (high-density, sink/source) for use on a 1715 backplane behind the 1715-AENTR.
• 1715-OB8DE​ — 8-point 24 V DC digital output module (source) compatible with the 1715 redundant I/O system.
• 1715-IF16​ — 16-channel analog input module (voltage/current) for process signal acquisition on a 1715 rack served by the 1715-AENTR.
• 1715-OF4​ — 4-channel analog output module for control valve or setpoint drive signals in a 1715 redundant I/O assembly.
• 1756-EN2T​ / 1756-EN3T​ — ControlLogix EtherNet/IP communication modules commonly acting as the controller-side partner communicating with the 1715-AENTR.
• 1783-ETAP​ — Stratix 2000 / managed Ethernet tap for building DLR rings with the dual ports of the 1715-AENTR.
• Studio 5000 Logix Designer​ — Rockwell engineering software used to configure the 1715-AENTR, assign IP addresses, define I/O tags, and monitor adapter health.