The Allen-Bradley 1794-ASB is a Flex I/O Remote I/O (RIO) communication adapter module designed for distributed I/O systems. It connects a Flex I/O rack to a Remote I/O network, enabling controllers to communicate with field-level I/O modules via legacy RIO protocols. The adapter includes an integrated 24 V DC power supply and supports up to 8 Flex I/O modules, providing scalable expansion and flexible I/O placement in industrial automation environments. Technical details Specification Details Product Name Allen-Bradley 1794-ASB Module Type Flex I/O Remote I/O (RIO) Adapter Function Remote I/O communication between controller and Flex I/O Network Supported Remote I/O (RIO) I/O Modules Supported Up to 8 Flex I/O modules Power Supply 24 V DC nominal Input Voltage Range ~19.2 – 31.2 V DC Communication Rates 57.6 kbps, 115.2 kbps, 230.4 kbps Mounting DIN-rail or panel mount Status Indicators Power and fault LEDs Typical Use Distributed I/O connectivity over RIO network Weight ~0.06 kg Temperature (Operating) ~0 °C to 55 °C Temperature (Storage) ~-40 °C to 85 °C Protection Industrial environment rated Typical Controllers Legacy and FlexLogix controllers Typical Cable Remote I/O cable (e.g., Belden 9463)
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