Product Description:

Allen-Bradley 1715-AENTR redundant Ethernet adapter

The Allen‑Bradley 1715‑AENTR redundant Ethernet adapter is not an ordinary communication

gateway, but a fault‑tolerant network interface engineered specifically to eliminate the risk of "

single point communication failure" in industrial control systems at its root. It directly addresses the

core pain points in critical process control scenarios where unplanned downtime is unacceptable—

such as petrochemical, power generation, and pharmaceutical manufacturing—including unplanned

production line shutdowns, batch scrappage, and safety interlock actuation caused by failure of a

single communication module, network cable breakage, or port malfunction.

Through the collaborative operation of a dual‑adapter parallel redundant architecture (adapter pair)

and Device Level Ring (DLR), it enables your ControlLogix PAC to establish a fault‑transparent

communication link with remote I/O racks, elevating system availability from "high reliability" to "

continuous operational survivability".

A.Primary Application Fields:

1.Refining & Oil & Gas Production: In atmospheric and vacuum distillation, catalytic cracking, and

other process units, field I/O stations are widely distributed and exposed to highly corrosive envi-

ronments. Deployed as a redundant adapter pair, the 1715‑AENTR achieves bumpless takeover

within 50–100 ms via the backup adapter if the primary adapter loses communication due to

vibration or aging. This ensures uninterrupted real‑time monitoring of field pressure, temperature,

and valve feedback by the DCS system, completely eliminating unit‑wide interlock shutdowns

triggered by communication loss.

2.Pharmaceutical & Biotechnology: On batch production lines compliant with FDA 21 CFR Part 11,

batch data continuity and equipment state traceability are core requirements for validation and

auditing. Paired with SIL 2‑certified I/O modules (e.g., 1715‑IB16D, 1715‑OB8DE) and operating in

redundant mode, the 1715‑AENTR maintains an active EtherNet/IP connection between the

controller and I/O at all times—even during firmware upgrades or hot‑swap replacement of a

single adapter—eliminating communication "gaps" in batch records.

3.Water Treatment & Municipal Infrastructure: In inter‑basin water transfer and large‑scale waste-

water treatment projects, pumping stations and pre‑treatment workshops are separated by several

kilometers. Connected via fiber‑optic DLR, the 1715‑AENTR enables data frames to reroute in reverse

within <3 ms in the event of a single optical fiber splice failure or switch port malfunction. The commu-

nication integrity between remote I/O stations and the central control room remains 100%, ensuring

uninterrupted status acquisition and remote start/stop control for screens, lift pumps, and other equip-

ment despite physical link changes.

4.Power Generation & Grid Auxiliary Services: In gas turbine intake filtration systems and flue‑gas desulfurization/denitrification CEMS online monitoring stations, environments feature high dust

concentration and strong electromagnetic interference. The 1715‑AENTR adopts a physically isolated

dual Ethernet port design, supporting simultaneous connection to two independent primary/backup

industrial switch networks. During maintenance or power module replacement of either switch rack,

communication traffic seamlessly switches to the redundant network plane, guaranteeing real‑time

upload of environmental monitoring data to provincial platforms and avoiding invalid data marking

and assessment penalties.

B.Core Differences vs. Siemens ET 200SP HA Interface Modules

Many engineers benchmark the redundant interface of Siemens ET 200SP HA IM 155‑1 against this

product. The two solutions address fundamentally different redundancy layers.

The IM 155‑1 implements media redundancy for the bus interface module: upon failure of the

primary interface module, the system requires a PROFINET media redundancy switchover time

of approximately 200–500 ms, with the backup interface in cold standby.

In contrast, the 1715‑AENTR delivers adapter‑level "hot fault‑tolerant" architecture. In the 1715

system, two 1715‑AENTR modules operate simultaneously, independently receiving identical

output data from the ControlLogix controller and synchronously returning input status to the controller.

This means: the Siemens solution follows a "fail‑and‑switch" logic with a control cycle gap during

switchover; the 1715‑AENTR operates in "always active‑active" mode, with the backup module run-

ning at full speed the moment a fault occurs. For safety interlocks or servo positioning requiring

ultra‑fast response, this architectural difference is the fundamental distinction between "shutdown

for maintenance" and "online transparent operation".

C. Integration Philosophy vs. Yokogawa FIO Redundant Systems

FIO nodes in Yokogawa CENTUM VP systems also support redundant communication, but their

redundancy logic relies on the dedicated Vnet/IP network and Yokogawa VF bus—essentially a

vertically integrated DCS vendor solution.

The unique advantage of the 1715‑AENTR lies in its decoupled redundant I/O communication

capability, offered as a standard EtherNet/IP device interoperable with third‑party systems. If you

use Schneider Quantum or B&R controllers, standard EtherNet/IP scanner functionality is sufficient

to directly drive the 1715‑AENTR redundant pair and access full diagnostic and redundancy status data.

It is not a closed component of the Rockwell ecosystem, but an open, interoperable standard redun-

dant communication module. For end‑users with multi‑brand control systems (e.g., automotive joint

ventures using AB, Siemens, and Schneider), the 1715‑AENTR is the only choice for enterprise‑wide

I/O asset standardization—no need to train maintenance teams on redundant I/O technologies for

each controller, only one 1715 system.

D:I/O Link Redundancy vs. Honeywell C300: The C300 controller in the Honeywell Experion system

achieves redundant I/O rack connectivity via IO‑Link, but its redundancy depends on the controller’

s own redundant pair and dedicated IO‑Link interfaces, with a maximum remote I/O rack distance

of 300 meters.

Based on the standard Ethernet physical layer, the 1715‑AENTR can deploy redundant I/O racks up

to 15 km from the control room using single‑mode fiber converters—an irreplaceable advantage for

geographically dispersed assets such as mine belt conveyors, long‑distance pipeline valve chambers,

and distributed PV booster stations.

You can install one 1715‑AENTR pair in the control center and another in a valve chamber 10 km away,

connected via carrier‑grade Ethernet circuits or dark fiber, with adapter‑level redundancy at both ends.

The Honeywell architecture would require additional remote controllers or protocol conversion

gateways at equivalent distances, increasing fault points and latency.

E.Must the 1715‑AENTR be purchased and used in pairs? Can I use only one?

A: No. The 1715 system architecture mandates dual‑adapter operation. Per Rockwell Automation`s

official user manual (Publication 1715‑UM001J), slots 0 and 1 of the system rack must both be fitted

with adapters. Installing only one adapter triggers a persistent "partner adapter missing" alarm in

the controller and generates periodic diagnostic noise. Even in simplex I/O configurations, both

adapters must remain online—one as the primary agent, the other as the hot‑standby agent. This

is the fundamental prerequisite for the 1715 platform to achieve "zero single point of failure".

F:Which firmware versions are supported? How do I verify known issues with my module?

A: The current mainstream shipping version is 3.003 and later. A critical technical notice: Rockwell

Automation issued Product Notice 2020‑07‑002 / PN1520 in July 2020, confirming that 1715‑AENTR

firmware v3.002 and earlier may cause false "Soft Error Detect (SED)" alarms when paired with the

1715‑OB8DE digital output module, marking the output module as faulty (red health indicator) with

no actual hardware failure.

This issue does not affect hardware functionality and is fully resolved by upgrading firmware to

v3.003 or later. All modules we supply are guaranteed to have firmware version ≥3.003, with upgrade

records available. We do not recommend purchasing early‑batch used modules with unverifiable

firmware versions.

G:Are additional software licenses required to configure the 1715‑AENTR?

A: No. The 1715‑AENTR uses the standard EtherNet/IP protocol, with its EDS file fully integrated

into Rockwell Automation’s Studio 5000 environment (v24 and above). Adding "1715 Redundant

I/O" in the I/O configuration tree automatically invokes the built‑in Add‑On Profile, with no extra soft-

ware option fees. For third‑party controller users, standard EDS files are freely downloadable from

the Rockwell website and importable into any programming software supporting EtherNet/IP scanners.

H: What are the I/O module configuration differences between simplex and duplex modes?

A:This is the most commonly misunderstood concept in system integration.

Simplex mode: One I/O module operates independently, with its signal read simultaneously by both

adapters; hot‑swap is supported.

Duplex mode: Two identical I/O modules (e.g., two 1715‑IB16D) are installed in adjacent slots

(e.g., slots 2 & 3), with the channel configured as "Duplex" in Studio 5000 for 1‑out‑of‑2 voting or

2‑out‑of‑2 comparison. One module can be hot‑swapped without system shutdown, with the

system operating in degraded mode.

I:What is the module’s MTBF? Is it suitable for SIL 2 safety applications?

A: Official MTBF (Mean Time Between Failures) data is available in the latest technical datasheet.

Regarding safety rating: Yes, the entire 1715 system (including the 1715‑AENTR adapter and matching

digital/analog I/O modules) is TÜV‑certified to IEC 61508, suitable for SIL 2 safety‑related applications

(e.g., emergency shutdown subsystems, fire & gas detection systems). Note that SIL 2 certification

requires the system to operate in **duplex mode** to achieve sufficient hardware fault tolerance

(HFT = 1)

J:What is the module’s MTBF? Is it suitable for SIL 2 safety applications?

The 1715‑AENTR has a maximum power consumption of 8W, drawing 380mA @ 24V DC from the

backplane—extremely low heat generation. The heat output of a full 1715 rack (2 adapters + 8 I/O

modules) is far lower than a standard industrial switch. No additional cooling modifications are

required for the control cabinet; natural convection within the cabinet is sufficient for operation at

0°C to 60°C. This represents a major improvement over legacy PLC rack‑mount communication

processors, which required forced air cooling due to high heat generation.

K:Can the 1715‑AENTR connect to non‑Rockwell controllers (e.g., Siemens S7‑1500)?

A: Technically feasible, but requires careful validation. The 1715‑AENTR is a standard EtherNet/IP

adapter device. The Siemens S7‑1500 can act as an EtherNet/IP scanner via interfaces such as the

CP 1543‑1 (configured in TIA Portal). The critical requirement is that the S7‑1500 must correctly

process the 1715‑AENTR’s redundancy status objects.

L. How to Identify a Reliable, High-Quality Siemens PLC Supplier

A trustworthy supplier proactively transparentizes all details. First, we provide multi-angle, high-

resolution photos of the actual product—including the housing, ports, and a close-up of the label

(clearly showing the order number  1715-AENTR)—rather than using only official website

images. Second, we clearly mark inventory status and are willing to provide stock proof. Finally, we

offer complete technical support and warranty services (12-month warranty) and can provide formal

procurement channel documentation, ensuring every device you receive is genuine and original.

J. Is this 1715-AENTR brand new and original? Is it in stock?

We guarantee that all Siemens PLC products we sell are 100% brand new and original. This model is a

common stock item and is currently available for immediate shipment. 

K.What are the physical dimensions and weight of the product? 

The module has a compact size of approximately 23 x 18 x 7 cm (W x H x D) and weighs about

0.34 kg. 

K. How can I verify the product I receive is genuine?

1.  Visual Inspection: Genuine modules feature excellent craftsmanship, clear printing, uniform coloring, and tight-fitting connectors.

2.  Label Verification: Check that the order number (1715-AENTR) and serial number (S/N) on the module label are clear and unique.

3.  Functional Test: Connect using official Siemens software; it should correctly read the module type, serial number, and firmware information.

4. Official Channels: If in doubt, consult Allen Bradley directly using your purchase proof and product serial number.

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