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    Discontinued / Obsolete by OEM
    Apter Power reviews dual-media identity, official records, condition, quotation, sourcing, and pre-shipment documentation for this adapter.

1794-ACNR15

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Allen-Bradley 1794-ACNR15 is a redundant-media ControlNet 1.5 FLEX I/O adapter with two BNC connections and capacity for eight local modules.
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Technical specifications for 1794-ACNR15

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1794-ACNR15
  • Product Family:
    Flex I/O
  • Product Type:
    FLEX I/O Redundant ControlNet Adapter
  • Stock:
    1
  • Network:
    ControlNet 1.5
  • Network connectors:
    2 x BNC, media A and B
  • Media support:
    Redundant ControlNet
  • Network data rate:
    5 Mbps
  • Maximum I/O modules:
    8
  • Nominal input voltage:
    24 V DC
  • Input voltage range:
    19.2...31.2 V DC
  • FLEXBus output:
    5 V DC, 640 mA maximum
  • Operating temperature:
    -25...55 °C
  • Current series:
    Series D
  • Firmware revision:
    10.3
  • Weight:
    0.22 kg
  • Estimated shipping dimensions:
    8.74x9.4x9.2cm
  • Tariff Code:
    Please confirm the destination before shipping
  • Country of origin:
    Singapore
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Media Redundancy Network Setup Series D Review Product Applications

Features:

  • Redundant ControlNet media: separate BNC connections serve paths A and B
  • 5 Mbps scheduled network: ControlNet 1.5 carries distributed I/O data
  • Eight-module local bank: 640 mA FLEXBus output supports the documented station
1794-ACNR15 is differentiated by its ability to connect one FLEX I/O bank to two ControlNet media paths.

Useful redundancy requires genuinely independent coax routes and a network configuration that recognizes the adapter and both media channels.

Lifecycle planning should protect the paired segment drawings as carefully as the node address, schedule, firmware, and rack definition.

Rockwell Automation identifies 1794-ACNR15 as end of life; availability is subject to Apter Power sourcing confirmation.
Allen-Bradley 1794-ACNR15 FLEX I/O Redundant ControlNet Adapter Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Prove both ControlNet paths independently

  • Media A: record its tap, segment, terminators, and neighboring nodes.
  • Media B: document a physically independent secondary path.
  • Failover test: observe communications during one controlled media interruption.
  • Status record: save normal and degraded adapter indications.

Restore the scheduled node context

  • Address: match the hardware node setting to the project.
  • Keeper data: preserve the approved network configuration.
  • Schedule: validate controller ownership and scheduled connection parameters.
  • Tools: retain compatible RSNetWorx and controller project versions.

Align firmware and installed module support

  • Catalog marking: verify 1794-ACNR15 Series D on the offered unit.
  • Firmware: retain revision 10.3 for the documented capabilities.
  • 32-bit modules: compare installed module requirements with the adapter record.
  • FLEXBus: keep total current within 640 mA across eight modules.

Officially supported application roles

  • Redundant ControlNet I/O: maintain distributed signals across dual media paths.
  • Critical process stations: preserve communication through one planned media fault.
  • Legacy FLEX I/O banks: support an eight-module scheduled station.
  • Network migration: document both media channels before redesigning the architecture.
Description
With separate ControlNet media A and B connections, 1794-ACNR15 adds redundant 5 Mbps network paths to a FLEX I/O station. The adapter supports up to eight local modules.

Series D 1794-ACNR15 supplies 5 V DC at up to 640 mA on FLEXBus and supports documented 32-bit modules. Its redundant-media role depends on correct coax routing, termination, address, keeper, and schedule configuration.

Rockwell Automation lists 1794-ACNR15 as end of life. Procurement and migration reviews should distinguish its two-media architecture from the single-port ACN15 and preserve both segment records before any change.
Revisions

Revision Part #

Also known as

1794-ACNR15 Series D
1794-ACNR15/D, Series D
Alternative Names
Allen-Bradley 1794-ACNR15 adapter Rockwell Automation 1794-ACNR15 AB 1794 ACNR15 1794ACNR15 redundant ControlNet adapter FLEX I/O ControlNet media adapter 1794-ACNR15 1794-ACNR15 Series D
Technical notes
The model-specific risk for 1794-ACNR15 is assuming two connected BNC cables prove media redundancy. Validate independent A and B paths, terminators, node address, keeper and schedule files, Series D firmware, eight-module order, and the 640 mA FLEXBus budget under a controlled single-path test.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
How can redundant-media operation of 1794-ACNR15 be demonstrated safely?
Establish a normal baseline, interrupt one approved media path under controlled conditions, confirm scheduled I/O remains stable, review status indications, then restore and retest the other path.
Why must media A and B for 1794-ACNR15 follow separate physical routes?
Shared damage, power, cabinet passages, or tap faults can defeat both paths at once; independent routing preserves the engineering value of redundant ControlNet media.
Which configuration records are essential when exchanging 1794-ACNR15?
Retain the node address, keeper file, schedule, controller ownership, firmware, RSNetWorx version, rack order, both segment drawings, and accepted diagnostic states.
How should 1794-ACNR15 be distinguished from 1794-ACN15 during procurement?
Confirm the complete ACNR15 catalog, two BNC media connections, Series D label, firmware record, and requirement for redundant ControlNet rather than a single-media station.
What can cause one path of 1794-ACNR15 to remain degraded after the adapter is replaced?
Inspect that path’s tap, connector, cable, terminators, routing, neighboring devices, and network configuration instead of treating the new adapter as proof of media health.
When does the 640 mA FLEXBus limit matter for 1794-ACNR15 fault recovery?
It matters whenever module count or sequence changes; total the exact bus demand so a restored network path does not conceal an overloaded local station.