Allen-Bradley 1794-ASB2 FLEX Remote I/O Adapter

The 1794-ASB2 is a discontinued remote I/O adapter module manufactured by Allen-Bradley for the FLEX I/O system platform. Powered by an integrated 24 VDC power supply, this adapter interfaces up to two FLEX I/O modules to a Remote I/O (RIO) network, enabling distributed signal collection and control without dedicated local controllers.

Network Communication and Capacity

The adapter translates control messages between the main Remote I/O scanner and the connected I/O terminal bases over the Flexbus backplane. Designed specifically for smaller, space-constrained enclosures, it supports a maximum capacity of two I/O modules while maintaining high-speed real-time signal transmission.

Power and System Integration

Operating on 24 VDC, the internal power supply distributes logic power directly across the Flexbus to power the attached module circuits. Its compact modular housing mounts on standard DIN rails, providing an efficient gateway for expanding I/O nodes in distributed automation architectures.

Frequently Asked Questions

Q: How many FLEX I/O modules can the 1794-ASB2 adapter support? A: The 1794-ASB2 is specifically designed to support a maximum capacity of 2 I/O modules on the Flexbus backplane.

Q: What network interface does this adapter module use? A: It connects distributed I/O nodes to the primary controller using Allen-Bradley Remote I/O (RIO) communication.