1794-0A8I | Allen-Bradley A Flex 8 Point Digital Output Module
1794-0A8I | Allen-Bradley A Flex 8 Point Digital Output Module
1794-0A8I | Allen-Bradley A Flex 8 Point Digital Output Module
1794-0A8I | Allen-Bradley A Flex 8 Point Digital Output Module
1794-0A8I | Allen-Bradley A Flex 8 Point Digital Output Module
1794-0A8I | Allen-Bradley A Flex 8 Point Digital Output Module
    1794-0A8I | Allen-Bradley A Flex 8 Point Digital Output Module
    1794-0A8I | Allen-Bradley A Flex 8 Point Digital Output Module
1794-0A8I | Allen-Bradley A Flex 8 Point Digital Output Module
1794-0A8I | Allen-Bradley A Flex 8 Point Digital Output Module

1794-0A8I | Allen-Bradley A Flex 8 Point Digital Output Module

Part #: 1794-0A8I Manufactured by: Allen-Bradley
$338.30
$338.30
5 in Stock
Condition: New – Open box
Shipping calculated at checkout.
Product Overview
The 1794-OA8I is an 8-point isolated AC output module designed for Flex I/O systems requiring reliable 120V AC discrete ou...  Read more
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Product Description P/N: 1794-0A8I

Description / Specifications

Description 

The Allen-Bradley 1794-OA8I is a FLEX I/O AC output module designed for switching AC field devices in distributed control systems. It provides 8 individually isolated output channels for controlling actuators, relays, and indicators.

 

 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category PLCs and Accessories
Part Number 1794-OA8I
Subcategory PLC Expansion Modules
Product Type Flex I/O Digital Output Module
Product Line Flex I/O 1794
Number of Outputs 8 isolated outputs
Output Voltage (Nominal) 120V AC
Output Current Rating 4.0 A
On-State Current (Minimum) 5 mA per output
On-State Voltage Drop (Max.) 1.0 V @ 0.5 A
Off-State Leakage Current (Max.) 2.25 mA
Isolation Voltage 120V continuous
FlexBus Current Consumption 80 mA @ 5V DC
Power Dissipation 4.1 W @ 0.5 A
Thermal Dissipation 14.0 BTU/hr @ 0.5 A
Mounting Type DIN rail
Enclosure Rating IP20 open style
Weight 0.11 kg

 

 

Information About 1794-0A8I

The 1794-OA8I is part of the Allen-Bradley FLEX I/O 1794 series, developed to offer modular, space-saving distributed I/O solutions. This module features 8 individually isolated AC outputs, supporting nominal 120/240V AC operation, making it suitable for direct control of AC devices. It mounts on a FLEX I/O terminal base and connects to adapters for communication with ControlLogix, CompactLogix, or other Allen-Bradley controllers via EtherNet/IP, ControlNet, or DeviceNet. Each output channel is electrically isolated, providing enhanced protection and flexibility in mixed-load applications. Built with LED status indicators, the 1794-OA8I simplifies diagnostics and monitoring, ensuring reliable performance in industrial environments.

Key Features:

  • Design: Compact FLEX I/O module with modular DIN rail mounting.

  • Outputs: 8 individually isolated AC output channels for flexible load control.

  • Voltage Range: Supports 120/240V AC nominal operation.

  • Compatibility: Works with FLEX I/O adapters and integrates with ControlLogix and CompactLogix systems.

  • Performance: Provides dependable switching for AC actuators, relays, and indicators.

  • Diagnostics: Channel status LEDs for easy troubleshooting and monitoring.

  • Safety/Isolation: Individually isolated outputs improve reliability and protection.

  • Application Range: Suitable for process control, factory automation, and distributed I/O systems.

The 1794-OA8I delivers the flexibility and reliability required for AC output switching in modern industrial automation.

Frequently Asked Questions about 1794-0A8I
Question: What is the 1794-0A8I used for?
Date Update:26/05/2025
Answer:

The 1794-0A8I is a Flex I/O AC digital output module designed to provide isolated 120V AC control signals to field devices such as relays, contactors, indicator lamps, or other actuators. It serves as the interface between a programmable logic controller (PLC) and output devices, enabling automated control within distributed I/O systems. The module is typically used in industrial environments where isolated AC output switching is required for multiple independent circuits.

Question: Which accessories are required for proper operation of this module?
Date Update:26/05/2025
Answer:

To operate correctly, the 1794-0A8I must be used with a compatible terminal base, such as the 1794-TB3S, TB2, TB3, TBN, or TBNF. It also requires external AC power and appropriate fusing (typically 1.6 A, slow-blow, 250V fuses) for output protection. The keyswitch on the terminal base must be set to Position 8 before installation.

Question: Is the 1794-0A8I suitable for high-density output applications?
Date Update:26/05/2025
Answer:

The module is ideal for medium-density output requirements where individual isolation is needed between channels. While it provides only 8 outputs, its compact size and modular design allow multiple modules to be installed side-by-side for higher density. The isolated outputs also help maintain flexibility in multi-load installations.

Question: What are the power and thermal dissipation specifications?
Date Update:26/05/2025
Answer:

The power dissipation of the module is 4.1 Watts at 0.5 Amps, and it can reach 6.3 Watts at 1 Amp total load. In terms of heat, it dissipates approximately 14.0 BTU/hr at 0.5A, so proper ventilation or spacing should be considered, especially in tightly packed enclosures or high-temperature environments.

Question: Is the 1794-0A8I still in production?
Date Update:26/05/2025
Answer:

Yes, the Allen-Bradley 1794-0A8I is still in production. According to Rockwell Automation, its lifecycle status is "Active Mature", which means the product is actively supported and available for sale.

IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 1794-OA8I is a FLEX I/O AC output module designed for switching AC field devices in distributed control systems. It provides 8 individually isolated output channels for controlling actuators, relays, and indicators.

 

 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category PLCs and Accessories
Part Number 1794-OA8I
Subcategory PLC Expansion Modules
Product Type Flex I/O Digital Output Module
Product Line Flex I/O 1794
Number of Outputs 8 isolated outputs
Output Voltage (Nominal) 120V AC
Output Current Rating 4.0 A
On-State Current (Minimum) 5 mA per output
On-State Voltage Drop (Max.) 1.0 V @ 0.5 A
Off-State Leakage Current (Max.) 2.25 mA
Isolation Voltage 120V continuous
FlexBus Current Consumption 80 mA @ 5V DC
Power Dissipation 4.1 W @ 0.5 A
Thermal Dissipation 14.0 BTU/hr @ 0.5 A
Mounting Type DIN rail
Enclosure Rating IP20 open style
Weight 0.11 kg

 

 

Information About 1794-0A8I

The 1794-OA8I is part of the Allen-Bradley FLEX I/O 1794 series, developed to offer modular, space-saving distributed I/O solutions. This module features 8 individually isolated AC outputs, supporting nominal 120/240V AC operation, making it suitable for direct control of AC devices. It mounts on a FLEX I/O terminal base and connects to adapters for communication with ControlLogix, CompactLogix, or other Allen-Bradley controllers via EtherNet/IP, ControlNet, or DeviceNet. Each output channel is electrically isolated, providing enhanced protection and flexibility in mixed-load applications. Built with LED status indicators, the 1794-OA8I simplifies diagnostics and monitoring, ensuring reliable performance in industrial environments.

Key Features:

  • Design: Compact FLEX I/O module with modular DIN rail mounting.

  • Outputs: 8 individually isolated AC output channels for flexible load control.

  • Voltage Range: Supports 120/240V AC nominal operation.

  • Compatibility: Works with FLEX I/O adapters and integrates with ControlLogix and CompactLogix systems.

  • Performance: Provides dependable switching for AC actuators, relays, and indicators.

  • Diagnostics: Channel status LEDs for easy troubleshooting and monitoring.

  • Safety/Isolation: Individually isolated outputs improve reliability and protection.

  • Application Range: Suitable for process control, factory automation, and distributed I/O systems.

The 1794-OA8I delivers the flexibility and reliability required for AC output switching in modern industrial automation.

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