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
$475.00
$475.00
5 in Stock
Condition: New-Surplus Original Box
Shipping calculated at checkout.
Product Overview
The Allen-Bradley 1794-0A8I is an A Flex 8-Point Digital Output Module designed for industrial automation systems. It prov...  Read more
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Product Description P/N: 1794-0A8I

Description / Specifications

Description 

The Allen-Bradley 1794-0A8I Flex I/O Digital Output Module has 8 Isolated Outputs, a 120V AC Output Voltage nom., and a 4.0A Output Current Rating. It also operates with a 1.0V @ 0.5A max. On-state Voltage Drop max. and a 2.25mA Off-state Leakage Current max..

 

Technical Specifications 

 

Manufacturer Rockwell Automation
Brand Allen-Bradley
Part Number/Catalog No. 1794-0A8I
Product Type Flex I/O Digital Output Module
Outputs 8 Isolated
Output Voltage nom. 120V AC
Output Current Rating 4.0A
On-state Current min. 5mA per Output
On-state Voltage Drop max. 1.0V @ 0.5A max.
Off-state Leakage Current max. 2.25mA
Isolation Voltage 120V Continuous
Flexbus Current 80mA @ 5V DC
Power Dissipation 4.1W @ 0.5A max.
Thermal Dissipation 14.0 BTU/hr. @ 0.5A max.
Series A

  

 

Information About 1794-0A8I

The 1794-0A8I module is a FLEX I/O AC digital output module manufactured by Allen-Bradley/Rockwell Automation. This 8-channel digital output module is part of the distributed I/O system that is used to connect actuators that can be triggered by the process logic that is programmed into the industrial automation controller. In this way, the 1794-0A8I module is the interface of the PLC. This module is installed by inserting it into a terminal base that has a keyswitch which must be put in Position 8. Terminal bases compatible with this module are the 1794-TB3S, 1794-TB2, 1794-TB3, 1794-TBN, and the 1794-TBNF terminal bases. Wiring to terminals on these terminal bases means that the individual isolated output is connected to the even number terminal and 120 Volts AC power is connected to the adjacent odd number terminal. Individually-isolated 120 Volts AC common terminals should be appropriately connected to each output device. When any output is in the active state, the corresponding LED indicator turns yellow on the field side of the housing.

The output current rating of the Allen-Bradley 1794-0A8I FLEX I/O AC digital output module is 4 Amps, which means that each output can generate up to 500 mA. The isolation voltage on the module is 120 Volts in the continuous mode (either channel to channel and field to backplane) and 1250 Volts AC for 60 seconds (channel to channel only). The 1794-0A8I module dissipates 4.1 Watts at 0.5 Amps of current and 6.3 Watts at 1 Amp of current. The recommended fusing for the module is 1.6 Amps, 250 Volts AC slow-blow fuses. The module can be installed in surroundings with temperatures between -20 and 55 degrees Celsius. Its dimensions are 94 millimeters by 94 millimeters by 69 millimeters.

 

Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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.
QElectro 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 1794-0A8I Flex I/O Digital Output Module has 8 Isolated Outputs, a 120V AC Output Voltage nom., and a 4.0A Output Current Rating. It also operates with a 1.0V @ 0.5A max. On-state Voltage Drop max. and a 2.25mA Off-state Leakage Current max..

 

Technical Specifications 

 

Manufacturer Rockwell Automation
Brand Allen-Bradley
Part Number/Catalog No. 1794-0A8I
Product Type Flex I/O Digital Output Module
Outputs 8 Isolated
Output Voltage nom. 120V AC
Output Current Rating 4.0A
On-state Current min. 5mA per Output
On-state Voltage Drop max. 1.0V @ 0.5A max.
Off-state Leakage Current max. 2.25mA
Isolation Voltage 120V Continuous
Flexbus Current 80mA @ 5V DC
Power Dissipation 4.1W @ 0.5A max.
Thermal Dissipation 14.0 BTU/hr. @ 0.5A max.
Series A

  

 

Information About 1794-0A8I

The 1794-0A8I module is a FLEX I/O AC digital output module manufactured by Allen-Bradley/Rockwell Automation. This 8-channel digital output module is part of the distributed I/O system that is used to connect actuators that can be triggered by the process logic that is programmed into the industrial automation controller. In this way, the 1794-0A8I module is the interface of the PLC. This module is installed by inserting it into a terminal base that has a keyswitch which must be put in Position 8. Terminal bases compatible with this module are the 1794-TB3S, 1794-TB2, 1794-TB3, 1794-TBN, and the 1794-TBNF terminal bases. Wiring to terminals on these terminal bases means that the individual isolated output is connected to the even number terminal and 120 Volts AC power is connected to the adjacent odd number terminal. Individually-isolated 120 Volts AC common terminals should be appropriately connected to each output device. When any output is in the active state, the corresponding LED indicator turns yellow on the field side of the housing.

The output current rating of the Allen-Bradley 1794-0A8I FLEX I/O AC digital output module is 4 Amps, which means that each output can generate up to 500 mA. The isolation voltage on the module is 120 Volts in the continuous mode (either channel to channel and field to backplane) and 1250 Volts AC for 60 seconds (channel to channel only). The 1794-0A8I module dissipates 4.1 Watts at 0.5 Amps of current and 6.3 Watts at 1 Amp of current. The recommended fusing for the module is 1.6 Amps, 250 Volts AC slow-blow fuses. The module can be installed in surroundings with temperatures between -20 and 55 degrees Celsius. Its dimensions are 94 millimeters by 94 millimeters by 69 millimeters.

 

Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

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