Overview
The Allen-Bradley 1794-OA16 is a 16-point AC digital output module designed for the Flex I/O family of distributed I/O systems. This module provides reliable switching of 120 V AC loads in ControlLogix, CompactLogix, and other Rockwell Automation control architectures. With 16 non-isolated output channels rated for 4.0 A maximum continuous current, the 1794-OA16 delivers dependable control of AC field devices including relays, solenoids, contactors, pilot lamps, and general industrial loads. The module features fast module replacement, open-style DIN-rail mounting, and global industrial certifications.
Key Features
- 16 non-isolated AC output channels with 120 V AC nominal output voltage (74–132 VAC operating range)
- Maximum output current: 4.0 A total; per-channel: 0.5 A continuous, 5.0 mA minimum
- Output delay: ½ cycle maximum for OFF-to-ON and ON-to-OFF transitions
- FlexBus interface: 80 mA @ 5 V DC; maximum power dissipation 4.7 W @ 0.5 A
- Built-in 2.5 A fuse protection and 16 status indicator LEDs (yellow)
- Screw-type terminal connection; requires compatible terminal base for installation
- Operating temperature: 0–55 °C (32–131 °F); storage: –40–85 °C (–40–185 °F)
- Vibration resistance: 5g at 10–500 Hz
Technical Specifications
- Output Type: AC Digital (non-isolated)
- Number of Outputs: 16 points
- Output Voltage Range: 74–132 VAC @ 47–63 Hz
- Nominal Output Voltage: 120 VAC
- Maximum Output Current (total): 4.0 A
- Per-Channel Maximum Continuous Current: 0.5 A
- Per-Channel Minimum ON-state Current: 5.0 mA
- Maximum ON-state Voltage Drop: 1.5 V AC @ 0.5 A
- Maximum OFF-state Leakage Current: 2.25 mA
- FlexBus Current (nominal): 80 mA @ 5 V DC
- Power Dissipation: 4.7 W @ 0.5 A maximum
- Output Delay: ½ cycle (maximum)
- Mounting: DIN-rail or panel mount
- Enclosure: Open-style
- Dimensions (H × W × D): 94 × 94 × 69 mm (3.7 × 3.7 × 2.7 in.)
- Weight: 0.26 lb
- Operating Temperature: 0–55 °C (32–131 °F)
- Storage Temperature: –40–85 °C (–40–185 °F)
- Terminal Connection: Screw-type (field-wired)
- Protection: Built-in 2.5 A fuse
- Status Indicators: 16 yellow LEDs (one per channel)
- Certifications: UL, CE, CSA, C-Tick, KC, GOST
Typical Applications
- Relay and solenoid coil control in manufacturing systems
- AC motor contactor switching and pilot device control
- Indicator lamp and buzzer/horn alarm control
- Valve actuator switching in process control
- Distributed I/O for remote cabinet or field-mounted control
- OEM machine control requiring 16-channel AC output switching
Compatibility & Replacements
Compatible With
- ControlLogix and CompactLogix systems via Flex I/O network adapters
- All 1794 Flex I/O communication adapters for distributed I/O deployment
- Terminal bases: 1794-TBN, 1794-TBNF, 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD, 1794-TBNK, 1794-TBNFK, 1794-TB3K, 1794-TB3SK
- Rockwell Automation ControlLogix, CompactLogix, and other Flex I/O-connected architectures
Replaces / Drop-In Replacement For
- Earlier revisions of 1794-OA16 with Rev. A01 or earlier firmware
- Verify specific compatibility with your system integrator or controls engineer before ordering. Original equipment manufacturer (OEM) documentation should be consulted for model-specific interchangeability.
Works With
- Rockwell Automation Studio 5000 Logix Designer and RSLogix 5000
- Flex I/O distributed I/O platform and topology
- EtherNet/IP and industrial Ethernet networks via Flex I/O adapters
- FlexBus connection for modular scalability
