Allen-Bradley 1794-OA8I
Allen-Bradley 1794-OA8I
Allen-Bradley 1794-OA8I
Allen-Bradley 1794-OA8I
Allen-Bradley 1794-OA8I
Allen-Bradley 1794-OA8I
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1794-OA8I

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Allen-Bradley 1794-OA8I is an eight-point FLEX I/O output module for switching isolated 85…132 V AC field loads through a compatible terminal base.
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Technical specifications for 1794-OA8I

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1794-OA8I
  • Product Family:
    Flex I/O
  • Product Type:
    FLEX I/O Eight-Point Isolated 120 V AC Digital Output Module
  • Stock:
    1
  • Output Points:
    8 individually isolated outputs
  • Output Type:
    AC digital output
  • On-State Voltage Range:
    85…132 V AC
  • Maximum Continuous Output Current:
    0.5 A per output at 55 °C
  • Maximum Total Output Current:
    4 A per module
  • Output Surge:
    7 A for 45 ms, repeatable every 8 seconds
  • Maximum Off-State Leakage:
    2.25 mA
  • External Fuse Recommendation:
    1.6 A, 250 V slow-blow per output
  • Compatible Terminal Bases:
    1794-TBN, TBNF, TB2, TB3, or TB3S
  • Operating Temperature:
    -20…55 °C
  • Dimensions:
    9.4 × 4.6 × 5.3 cm
  • Weight:
    0.107 kg
  • Tariff Code:
    8538900000
  • Country of origin:
    USA
  • 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 Isolated Outputs Load Protection Field Installation Application
  • Eight individually isolated AC outputs for FLEX I/O stations
  • Each output channel switches loads within the 85…132 V AC range
  • Channel isolation supports field loads referenced to separate AC potentials

1794-OA8I separates each of eight AC output circuits while retaining the compact modular layout of a FLEX I/O station.

Individual isolation is useful when field loads do not share one common potential, but every channel still must remain within the documented current and surge limits.

Coordinate the output fuse, terminal base, keyswitch, AC source, load inrush, and module temperature before energizing the station.

Availability, condition, price, and shipping time for 1794-OA8I are confirmed during quotation.

Allen-Bradley 1794-OA8I FLEX I/O Eight-Point Isolated 120 V AC Digital Output Module 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.

  • Eight AC outputs are isolated from the FLEX I/O system and from one another.
  • The output circuits switch compatible loads from an external 85…132 V AC source.
  • Channel isolation does not remove the need for coordinated branch protection and grounding.
  • Review continuous current, module total current, and load inrush for every channel.
  • Use the documented slow-blow fuse recommendation for individual output protection.
  • Apply appropriate suppression for inductive loads while preserving circuit isolation.
  • Install the module on a compatible base with the documented keyswitch setting.
  • Remove hazardous AC and system power before module or wiring changes.
  • Check terminal numbering, fuse continuity, module seating, and controller output mapping.
  • Independent switching of compatible 120 V AC field loads in distributed FLEX I/O stations.
  • AC actuator control where channel-to-channel isolation is required by the field-circuit arrangement.
  • Eight-point machine or process output control with individual channel protection and status indication.
Description
Allen-Bradley 1794-OA8I provides eight individually isolated AC output channels for compatible 120 V AC field loads in a FLEX I/O station.

The module supports documented per-channel and total current limits, channel status indication, field-to-system isolation, and an external fuse recommendation for each output circuit.

Before installation, verify terminal-base compatibility, keyswitch position, external AC supply capacity, load inrush, fuse selection, channel wiring, grounding, and the controller output configuration.
Revisions

Revision Part #

Also known as

1794-OA8I Ser A
1794-OA8I/A, Series A, Rev A
Alternative Names
1794-OA8I 1794OA8I 1794 OA8I Allen-Bradley 1794-OA8I Allen Bradley 1794-OA8I AB 1794-OA8I Rockwell Automation 1794-OA8I
Technical notes
Use 1794-OA8I where each AC output must remain isolated; confirm the terminal base, keyswitch, fusing, load inrush, and output mapping.
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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.
Why would a buyer choose Allen-Bradley 1794-OA8I instead of a grouped AC output module?
Its eight outputs are isolated channel to channel, which helps when field loads require separate AC circuits. Confirm the isolation scheme and load commons before ordering.
Can the existing fused AC output wiring be reused with Allen-Bradley 1794-OA8I?
Reuse it only after confirming the compatible terminal base, channel-to-channel isolation, fuse arrangement, conductor condition, load source, and terminal assignments. Photograph and label each circuit before disturbing the installation.
How should output fusing be planned for Allen-Bradley 1794-OA8I?
Rockwell recommends a 1.6 A, 250 V slow-blow fuse for each output. Also check the branch source, load inrush, fault energy, and local electrical requirements.
What should be checked before Allen-Bradley 1794-OA8I controls inductive AC loads?
Compare continuous current and inrush with the official limits, install suitable suppression where required, confirm fuse coordination, and verify that field wiring remains isolated as designed.
Can Allen-Bradley 1794-OA8I be removed while AC field power remains present?
No. Remove or isolate hazardous field and system power before disconnecting the module or terminal wiring, then verify the replacement keyswitch and seating.
Why might one Allen-Bradley 1794-OA8I channel remain off after replacement?
Check the controller command, channel fuse, AC source, terminal assignment, load continuity, inrush history, base contact, and whether the replacement module is fully seated.
What information should be provided when sourcing Allen-Bradley 1794-OA8I?
Include the full catalog number, hardware series, terminal base, keyswitch, AC supply, load type and inrush, fuse arrangement, station adapter, and required condition.

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