1794-OB8 Allen-Bradley FLEX I/O 8-Channel Digital DC Output Module

Product Overview

The Allen-Bradley 1794-OB8 serves as a versatile 8-channel digital DC output module designed specifically for the FLEX I/O distributed control system. Engineered to provide precise control over industrial actuators, this unit delivers 8 sourcing outputs capable of handling 24V DC loads with a maximum current of 500mA per channel. Its modular architecture allows engineers to build highly customized and scalable I/O racks directly on the factory floor, seamlessly integrating with various FLEX I/O adapters and network systems. We supply this item as a 100% Brand New, factory-sealed unit.

Technical Specifications

Engineering Advantages

High-Density Sourcing Output Control
The 1794-OB8 maximizes control cabinet space by providing 8 independent sourcing output channels in a single, compact FLEX I/O module. Each channel reliably drives standard 24V DC industrial loads—such as indicator lights, solenoid valves, and small motor starters—with up to 500mA of current. The module's total 4A current rating ensures stable operation even when multiple channels are active simultaneously.

Seamless FLEX I/O System Integration
Designed to plug directly into the standard FLEX I/O chassis, this module draws its backplane power (60mA @ 5V DC) directly from the adapter. This eliminates the need for complex external wiring harnesses and allows for rapid deployment in distributed I/O architectures. Its standardized footprint makes it easy to mix and match with analog, digital input, and specialty modules within the same rack.

Robust Electrical Isolation and Protection
Engineered for electrically noisy industrial environments, the 1794-OB8 features 50V continuous isolation voltage to protect sensitive control logic from field-side voltage spikes. With a minimal on-state voltage drop of just 0.5V DC, the module ensures that your field devices receive maximum operating voltage, improving overall system efficiency and reducing heat generation within the control panel.

FAQs

Q: What type of output configuration does the 1794-OB8 use?
A: The 1794-OB8 utilizes a sourcing output configuration. This means the module supplies positive 24V DC voltage to the load, and the load must be wired to a common ground (sink) to complete the circuit.

Q: How much current can each output channel handle?
A: Each of the 8 output channels can handle a maximum on-state current of 500 mA. The total combined current for the entire module should not exceed the 4A output current rating.

Q: What is the nominal operating voltage for this output module?
A: The 1794-OB8 is designed for standard industrial 24V DC applications. It features a maximum on-state voltage drop of 0.5V DC to ensure your connected devices receive adequate power.

Q: Which I/O system is the 1794-OB8 compatible with?
A: This digital output module is designed exclusively for the Allen-Bradley FLEX I/O (1794) system. It mounts seamlessly into a FLEX I/O chassis and communicates via the Flexbus to a compatible network adapter or controller.