Overview
Allen-Bradley 1771-OAD is a 16-point digital AC output module engineered for PLC-5 automation systems. This fused triac output module provides reliable switching of moderate-voltage AC loads in industrial control applications. The module supports a broad operating voltage range of 10–138V AC, making it suitable for diverse industrial equipment and legacy system upgrades.
Key Features
- 16 individually controlled AC output points with fused protection
- Triac-based output circuits for stable, noise-free switching
- 2 amps per output, maximum 8 amps per module
- LED indicators for real-time status monitoring of each output point
- Supports resistive and inductive AC loads
- Wide operating voltage range: 10–138V AC (47–63 Hz)
- 1500V AC field-to-logic isolation
Technical Specifications
- Output Voltage Rating: 10–138V AC, 47–63 Hz
- Output Current: 2A per point; 8A maximum per module
- Output Type: Fused triac (digital)
- Number of Outputs: 16 points
- Backplane Current Draw: 295 mA
- Signal Delay: 0.5 ms ON / 1 ms OFF
- Isolation: 1500V AC (field to logic)
- Operating Temperature: 0–60°C (32–140°F)
- Dimensions: 25.4 cm H × 5.1 cm W × 15.2 cm D
- Mounting: Standard PLC-5 I/O chassis
- Series: Allen-Bradley 1771 I/O Series
- Revision: Series C (Rev. C02)
Typical Applications
- AC solenoid valve control in packaging and fluid handling systems
- Motor starter and contactor switching in machine automation
- Indicator light and beacon control on production lines
- HVAC and facility automation load switching
- Legacy PLC-5 system module replacements and upgrades
Compatibility & Replacements
Compatible With
- Allen-Bradley PLC-5 processors and controllers
- 1771 series I/O chassis (all models except 1771-A1, 1771-A2, 1771-A4)
- Terminal bases: 1771-WH, 1771-WN, 1771-WD
- Classic Allen-Bradley automation systems running ladder logic
Replaces / Drop-In Replacement For
- Previous revisions of Allen-Bradley 1771-OAD output modules
- Direct replacement within Series C (Rev. C02)
Works With
- Allen-Bradley PLC-5 programming environments (RSLogix 5)
- 1771 series discrete and analog I/O modules within the same chassis
- Standard 24V DC logic and AC load switching applications
