1794-OA8I by Allen-Bradley | FLEX I/O 8-Channel AC Output Card

Product Description – Allen-Bradley 1794-OA8I FLEX I/O AC Output Module

Overview

The Allen-Bradley 1794-OA8I module provides reliable AC output control for distributed automation systems that require compact hardware and isolated channel performance. The module belongs to the FLEX I/O family, which offers modular expansion and flexible system architecture for industrial environments. Moreover, its individually isolated outputs help protect connected devices, while its small footprint supports dense installations in both machine control and process applications. The module also integrates smoothly with FLEX I/O adapters, allowing users to scale I/O capacity without redesigning existing control structures.

Technical Specifications

Model Number: 1794-OA8I
Series: FLEX I/O
Module Type: AC Digital Output Module
Number of Outputs: 8 isolated channels
Output Voltage Range: 74–132 V AC (120 V AC nominal), 85–265 V AC (240 V AC nominal)
Output Current: 1 A per channel (continuous)
Isolation: Individual channel isolation
Turn-ON Delay: ≤1 ms
Turn-OFF Delay: ≤11 ms
Surge Current: 10 A for 50 ms
Power Dissipation: Approximately 8 W
Dimensions: 94 × 92 × 46 mm
Weight: 0.25 lbs (0.25 kg)
Mounting: FLEX I/O terminal base (e.g., 1794-TB3, TB3S)
Operating Temperature: 0 °C to +55 °C
Storage Temperature: –40 °C to +85 °C
Humidity Rating: 5–95% RH, non-condensing
Certifications: CE, UL, CSA, C-Tick
Category: PLCs / Machine Control
Country of Origin: USA

FAQ

Q1: Does the 1794-OA8I support individually isolated outputs?
A1: Yes, each output channel is isolated, which improves system protection and fault tolerance.

Q2: What voltage levels does the module support?
A2: It supports 120 V AC nominal and 240 V AC nominal operating ranges.

Q3: Can it be used with existing FLEX I/O terminal bases?
A3: Yes, it is compatible with standard bases such as 1794-TB3 and 1794-TB3S.

Q4: What is the continuous output current per channel?
A4: Each channel supports up to 1 A of continuous current.

Q5: Which industries typically use this module?
A5: It is commonly used in manufacturing, machine control, material handling, and distributed process systems.