1794-ASB | Allen-Bradley FLEX Remote I/O Adapter 24VDC PS 8 I/O Module Capacity
1794-ASB | Allen-Bradley FLEX Remote I/O Adapter 24VDC PS 8 I/O Module Capacity
1794-ASB | Allen-Bradley FLEX Remote I/O Adapter 24VDC PS 8 I/O Module Capacity
1794-ASB | Allen-Bradley FLEX Remote I/O Adapter 24VDC PS 8 I/O Module Capacity
1794-ASB | Allen-Bradley FLEX Remote I/O Adapter 24VDC PS 8 I/O Module Capacity
1794-ASB | Allen-Bradley FLEX Remote I/O Adapter 24VDC PS 8 I/O Module Capacity
    1794-ASB | Allen-Bradley FLEX Remote I/O Adapter 24VDC PS 8 I/O Module Capacity
    1794-ASB | Allen-Bradley FLEX Remote I/O Adapter 24VDC PS 8 I/O Module Capacity
1794-ASB | Allen-Bradley FLEX Remote I/O Adapter 24VDC PS 8 I/O Module Capacity
1794-ASB | Allen-Bradley FLEX Remote I/O Adapter 24VDC PS 8 I/O Module Capacity

1794-ASB | Allen-Bradley FLEX Remote I/O Adapter 24VDC PS 8 I/O Module Capacity

Part #: 1794-ASB Manufactured by: Allen-Bradley
Regular price
$677.00
Sale price
$677.00
Regular price
25 in Stock
Condition: New-Surplus Original Box
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Product Overview
The Allen-Bradley 1794-ASB Remote IO Adapter has a 24 Volt DC Voltage, an 8 Module I/O Capacity, and an 11 to 31.2 Volt DC...  Read more
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Product Description P/N: 1794-ASB

Description / Specifications

Description 

The Allen-Bradley 1794-ASB is a FLEX I/O remote adapter module designed for integrating FLEX I/O systems into Remote I/O (RIO) networks. It provides high-speed communication between distributed I/O and controllers, supporting up to 8 I/O modules per adapter.

 

 

Technical Specifications 

Brand Allen-Bradley
Series Flex I/O
Part Number 1794-ASB
Manufacturer Rockwell Automation
Thermal Dissipation 15.7 BTU/hr @ 24V DC
Power Consumption 330 mA @ 24V DC
Operating Shock 30 g peak acceleration, 11(+1)ms pulse width
Vibration Tested 5 g @ 10-500Hz per IEC 68-2-6
Storage Temperature -40 to 85 C (-40 to 185 F)
Operating Temperature 0 to 55 C (32 to 131 F)
RIO cable Belden 9463 or Equivalent
Indicators Power; Adapter Active; Adapter Fault; Local Faul
Data Transfer speed 57.6Kbps, 115.2Kbps, and 230.4kbps
Supported topologies Daisy Chain
Supported Protocol RIO
Communication Port One (1) RIO port
Product Description Remote I/O communication Adapter
Power Dissipation 4.6 W @ 31.2V DC
Product Type Remote IO Adapter
Module Capacity 8 Modules
Mount DIN Rail
Controller Platform FlexLogix
Diagnostic Indicators Status
Enclosure IP20, Open Type
Communication Rate 57.6, 115.2, 230.4 Kbps
External Power Supply 450 mA at 24 Volts DC
Voltage 24 Volts DC
Dimensions 4 x 2 x 4 inches

  

 

Information About 1794-ASB

The 1794-ASB is part of the Allen-Bradley FLEX I/O 1794 series, developed for modular and distributed I/O architectures. This adapter allows FLEX I/O modules to connect directly to Allen-Bradley PLCs and other controllers via Remote I/O networks. It supports 57.6K, 115.2K, and 230.4K baud rates, providing reliable communication for time-critical applications. The 1794-ASB includes three rotary switches for setting node address, LED indicators for network and module status, and a removable terminal block for simplified wiring. With support for up to 8 FLEX I/O modules per adapter, it offers scalable expansion in a compact DIN rail–mounted form factor. Built for industrial environments, the 1794-ASB ensures robust and flexible integration of distributed I/O into RIO-based control systems.

Key Features:

  • Design: Remote I/O adapter for FLEX I/O systems.
  • Network Support: Connects FLEX I/O to Remote I/O networks.
  • Capacity: Supports up to 8 FLEX I/O modules per adapter.
  • Communication: Operates at 57.6K, 115.2K, and 230.4K baud rates.
  • Configuration: Rotary switches for node addressing.
  • Diagnostics: LED indicators for network, communication, and module status.
  • Installation: Compact DIN rail–mounted design with removable terminal block.
  • Application Range: Ideal for distributed I/O in process control and manufacturing automation.

The 1794-ASB delivers the scalability, reliability, and network integration required for distributed control in Remote I/O–based industrial automation systems.



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-ASB
Question: What kind of product is the 1794-ASB and what are its main features?
Date Update:29/05/2025
Answer:

The 1794-ASB is a Remote I/O communication adapter from the Allen-Bradley FLEX I/O series, designed to connect distributed FLEX I/O modules to legacy PLC systems. It communicates using the RIO protocol and mounts on a DIN rail in industrial control panels. This adapter supports up to 8 I/O modules and includes built-in diagnostic LEDs for system monitoring. With compact dimensions and durable construction, it is ideal for space-constrained automation environments.

Question: How many FLEX I/O modules can the 1794-ASB support?
Date Update:29/05/2025
Answer:

The 1794-ASB supports a maximum of eight FLEX I/O modules per adapter. This allows users to expand I/O capacity in a distributed manner without the need for multiple standalone controllers. Each module connects directly to the adapter, creating a compact and scalable I/O rack. This modularity is particularly advantageous for small-to-medium automation setups.

Question: What are the power requirements and consumption characteristics of the 1794-ASB?
Date Update:29/05/2025
Answer:

This module operates with a supply voltage range of 19.2–31.2V DC, with a nominal voltage of 24V DC. It draws a maximum of 450 mA and consumes about 4.6 Watts at 31.2V, with thermal dissipation rated at 15.7 BTU/hr. The internal power supply also converts 24V DC to 5V DC to support backplane operations. These specs ensure stable operation with efficient energy use in field installations.

Question: Can the 1794-ASB work with modern controllers like CompactLogix or ControlLogix?
Date Update:29/05/2025
Answer:

While primarily intended for legacy PLC platforms such as PLC5 and SLC500, the 1794-ASB can sometimes be used with modern Logix controllers via communication bridges or protocol converters. However, its RIO-based communication is not native to ControlLogix or CompactLogix systems. For modern platforms, it is generally more efficient to use EtherNet/IP-compatible FLEX I/O adapters. Upgrading to newer technology ensures better performance and long-term support.

Question: Is the 1794-ASB still in production?
Date Update:29/05/2025
Answer:

No, the 1794-ASB is no longer in production and was officially discontinued by Allen-Bradley on March 31, 2015. Since its discontinuation, the manufacturer has not recommended any direct replacement for this product. Users needing upgrades must evaluate newer FLEX I/O adapters or transition to EtherNet/IP solutions.

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-ASB is a FLEX I/O remote adapter module designed for integrating FLEX I/O systems into Remote I/O (RIO) networks. It provides high-speed communication between distributed I/O and controllers, supporting up to 8 I/O modules per adapter.

 

 

Technical Specifications 

Brand Allen-Bradley
Series Flex I/O
Part Number 1794-ASB
Manufacturer Rockwell Automation
Thermal Dissipation 15.7 BTU/hr @ 24V DC
Power Consumption 330 mA @ 24V DC
Operating Shock 30 g peak acceleration, 11(+1)ms pulse width
Vibration Tested 5 g @ 10-500Hz per IEC 68-2-6
Storage Temperature -40 to 85 C (-40 to 185 F)
Operating Temperature 0 to 55 C (32 to 131 F)
RIO cable Belden 9463 or Equivalent
Indicators Power; Adapter Active; Adapter Fault; Local Faul
Data Transfer speed 57.6Kbps, 115.2Kbps, and 230.4kbps
Supported topologies Daisy Chain
Supported Protocol RIO
Communication Port One (1) RIO port
Product Description Remote I/O communication Adapter
Power Dissipation 4.6 W @ 31.2V DC
Product Type Remote IO Adapter
Module Capacity 8 Modules
Mount DIN Rail
Controller Platform FlexLogix
Diagnostic Indicators Status
Enclosure IP20, Open Type
Communication Rate 57.6, 115.2, 230.4 Kbps
External Power Supply 450 mA at 24 Volts DC
Voltage 24 Volts DC
Dimensions 4 x 2 x 4 inches

  

 

Information About 1794-ASB

The 1794-ASB is part of the Allen-Bradley FLEX I/O 1794 series, developed for modular and distributed I/O architectures. This adapter allows FLEX I/O modules to connect directly to Allen-Bradley PLCs and other controllers via Remote I/O networks. It supports 57.6K, 115.2K, and 230.4K baud rates, providing reliable communication for time-critical applications. The 1794-ASB includes three rotary switches for setting node address, LED indicators for network and module status, and a removable terminal block for simplified wiring. With support for up to 8 FLEX I/O modules per adapter, it offers scalable expansion in a compact DIN rail–mounted form factor. Built for industrial environments, the 1794-ASB ensures robust and flexible integration of distributed I/O into RIO-based control systems.

Key Features:

  • Design: Remote I/O adapter for FLEX I/O systems.
  • Network Support: Connects FLEX I/O to Remote I/O networks.
  • Capacity: Supports up to 8 FLEX I/O modules per adapter.
  • Communication: Operates at 57.6K, 115.2K, and 230.4K baud rates.
  • Configuration: Rotary switches for node addressing.
  • Diagnostics: LED indicators for network, communication, and module status.
  • Installation: Compact DIN rail–mounted design with removable terminal block.
  • Application Range: Ideal for distributed I/O in process control and manufacturing automation.

The 1794-ASB delivers the scalability, reliability, and network integration required for distributed control in Remote I/O–based industrial automation systems.



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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