Allen-Bradley 1791-OA32 Series B Block I/O 32-Point AC Output Module

The Allen-Bradley 1791-OA32 Series B is a high-density AC output module designed to enhance industrial automation systems by providing efficient and reliable control over multiple output channels. This module is part of the 1791 Block I/O series, known for integrating communication, signal conditioning, and I/O circuitry into a compact assembly.

Key Features

• High-Density Outputs: Equipped with 32 AC output channels, organized into four groups of eight, facilitating structured and flexible connections.
• Wide Operating Voltage Range: Supports an output voltage range of 20–132V AC at 47–63 Hz, accommodating various industrial applications.
• Remote I/O Communication: Utilizes the Remote I/O (RIO) protocol, enabling seamless integration with RIO scanners for efficient data exchange.
• Flexible Mounting Options: Designed for both vertical and horizontal mounting orientations, allowing adaptability to different installation requirements.
• Robust Output Performance: Offers a maximum output current rating of 300mA per channel at 60°C for vertical mounting, with a surge current capacity of 10A for 50ms, repeatable every 2 seconds.

Technical Specifications

• Output Channels: 32 (4 groups of 8)
• Output Voltage Range: 20–132V AC, 47–63 Hz
• Output Current Rating:
  • Vertical Mounting: 300mA per channel at 60°C, 600mA at 30°C
  • Horizontal Mounting: 150mA per channel at 60°C, 300mA at 30°C
• Surge Current: 10A for 50ms per channel, repeatable every 2 seconds
• Minimum On-State Current: 50mA per output
• Maximum On-State Voltage Drop: 1.5V peak at 300mA
• Off-State Leakage Current: 3mA maximum
• Output Signal Delay:
  • Off to On: 1.0ms at 60Hz; 1.0ms at 50Hz
  • On to Off: 8.3ms at 60Hz; 10.0ms at 50Hz
• External Power Requirements: 85–132V AC, 47–63 Hz, 150mA at 132V AC
• Dimensions: 6.95H x 4.35W x 3.85D inches (176.5H x 110.5W x 98D mm)
• Operating Temperature: 0 to 60°C (32 to 140°F)
• Storage Temperature: –40 to 85°C (–40 to 185°F)
• Relative Humidity: 5 to 95% non-condensing

Installation and Compatibility

The 1791-OA32 Series B module is designed for straightforward installation, supporting both vertical and horizontal mounting orientations to suit various enclosure configurations. It is compatible with Allen-Bradley PLC-2, PLC-3, PLC-5/20, and PLC-5 controllers, ensuring versatility across different control systems. The module’s integration of a self-contained power supply and Remote I/O interface simplifies wiring and reduces the need for additional components, making it an efficient solution for distributed I/O applications.

Applications

Ideal for industrial environments requiring high-density AC output control, the 1791-OA32 Series B module is suitable for applications such as:

• Material handling systems
• Packaging machinery
• Process control operations
• Operator interface panels

Its robust design and advanced communication capabilities make it a reliable choice for enhancing automation efficiency and system performance.