Allen-Bradley | 1794-OA16 | FLEX I/O (1794 Series)

Product Description: Allen-Bradley 1794-OA16

The Allen-Bradley 1794-OA16 is a 16-channel digital output module in the FLEX I/O system, designed to switch AC loads such as contactors, relays, and indicator lights. This module uses triac-based solid- state switching and supports 120/240V AC outputs. The 16 output channels are grouped into two sets of 8, each sharing a common, making the module ideal for high-density AC output applications where grouped control is acceptable.

Key Features

• 16 triac output channels for AC load control
• Supports switching of 85–264V AC loads at 47–63 Hz
• Outputs grouped into 2 commons (8 outputs per group)
• Compatible with FLEX I/O terminal bases and adapters
• Per-channel LED indicators for status and diagnostics
• Zero-crossing detection for reduced electrical noise
• Compact, DIN-rail mountable design for space-saving installation

Technical Specifications

• Output Type: Triac (AC, non-isolated within group)
• Voltage Range: 85–264V AC
• Frequency: 47–63 Hz
• Max Output Current:
  • 0.5 A per channel
• Minimum Load: 10 mA @ 85V AC
• Surge Current: 10 A for 0.5 cycle
• Output Delay:
  • ON: ≤1 ms
• Isolation Voltage: 250V AC (group-to-backplane)
• Power Dissipation: Approx. 5.0 W
• Mounting: DIN rail via terminal base (e.g., 1794-TB3, 1794-TB3S)
• Operating Temperature: 0°C to 55°C
• Certifications: UL Listed, CE, CSA, RoHS, Class I Div 2

Application Areas

• Factory automation using multiple AC output devices
• High-density control of pilot lights, alarms, and solenoids
• Material handling and packaging machinery
• OEM panels with grouped AC signal switching
• Distributed I/O systems requiring flexible AC output capabilities

Advantages

• High channel density reduces module count and panel space
• Triac outputs ensure quiet, long-lasting operation
• Grouped outputs simplify wiring for repetitive applications
• LED diagnostics streamline troubleshooting
• Seamless integration into FLEX I/O networks for scalable control