Allen Bradley 1794-ASB2 Flex Remote I/O Adapter Module

Product Introduction

The Allen-Bradley 1794-ASB2 Flex Remote I/O Adapter Module is a compact communication interface designed to connect Flex I/O modules to a Remote I/O (RIO) network. It enables distributed I/O systems to communicate efficiently with controllers, providing a reliable solution for legacy and existing industrial automation architectures.

This adapter supports up to 2 Flex I/O modules, making it suitable for small-scale or localized I/O expansion. With an input voltage range of 11–31.2 V DC and a power consumption of 330 mA, the module ensures stable and efficient operation. It also features 500 V AC isolation, enhancing protection between the network and field-side devices.

The 1794-ASB2 interacts directly with the Flex I/O backplane, managing data exchange between connected modules and the Remote I/O scanner. Its compact size, DIN rail mounting capability, and open-style design make it easy to install in control panels where space and simplicity are important.

Product Specifications

Applications

• Legacy automation systems – Integrates Flex I/O modules into existing Remote I/O (RIO) networks

• Small distributed I/O setups – Ideal for applications requiring limited I/O expansion with simple architecture

• Factory automation – Supports communication between field devices and controllers in production environments

• Machine control systems – Provides localized I/O connectivity for compact machinery

• Retrofit projects – Enables modernization of older systems without replacing the entire control infrastructure

Advantages

• Simple integration with RIO networks – Provides an efficient interface for legacy control systems

• Compact I/O capacity – Supports up to 2 modules, ideal for small or targeted applications

• Wide input voltage range – Operates reliably from 11 to 31.2 V DC

• Electrical isolation – 500 V AC isolation improves system safety and signal integrity

• Easy installation – DIN rail mounting simplifies deployment in control cabinets

• Low power consumption – Efficient design reduces system load

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