Allen-Bradley 1791-16AO 16-Point 120V AC Output Block I/O

Allen-Bradley 1791-16AO Series A/B Remote Block I/O 16-Point AC Module

Product Overview

The 1791-16AO (also documented as 1791-16A0) is a specialized digital AC output block within the Allen-Bradley 1791 Block I/O family. Engineered for distributed intelligence, this module integrates the communication adapter and I/O interface into a single, compact housing. It is primarily utilized in Remote I/O (RIO) networks to drive localized AC field devices such as motor starters, solenoids, and indicators. By utilizing Triac-based switching technology, the 1791-16AO ensures reliable solid-state control of 120V AC loads, reducing mechanical wear and extending the operational life of the control system in high-cycle industrial applications.

Technical Specifications

The 1791-16AO is designed for high-performance switching and seamless integration with legacy PLC-5 and SLC 500 controllers.

• Manufacturer: Rockwell Automation / Allen-Bradley

• Model Number: 1791-16AO (Alternative: 1791-16A0)

• Hardware Revisions: Series A, Series B

• Module Type: Digital AC Output Block

• Output Channels: 16 Points

• Output Type: Triac (Solid State AC Sourcing)

• Nominal Output Voltage: 120V AC

• Operating Voltage Range: 85–132V AC

• Continuous Output Current: 0.5 A per channel @ 30°C (Reduced to 0.3 A @ 60°C)

• Maximum Module Current: 8.0 A total

• Surge Current: 5.0 A for 100 ms (Non-repetitive)

• Isolation Voltage: 1500V AC (field-to-logic)

• Communication Interface: Remote I/O (RIO) via Twinaxial Cable

• Power Requirements: 120V AC (Nominal)

• Operating Temperature: 0°C to +60°C (32°F to 140°F)

• Weight: 1.00 lbs (0.45 kg)

• Certifications: CE, UL, CSA compliance