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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
| Parameter | Description |
|---|---|
| Product Name | Flex Remote I/O Adapter Module |
| Model Number | 1794-ASB2 |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Network | Remote I/O (RIO) |
| Input Voltage Range | 11–31.2 V DC |
| I/O Capacity | Supports up to 2 Flex I/O modules |
| Power Consumption | 330 mA |
| Isolation Voltage | 500 V AC |
| Mounting Type | DIN Rail / Panel |
| Enclosure Rating | IP20, open style |
| Dimensions | 87 x 68 x 69 mm |
| Weight | 0.2 kg |
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
