The 1756-OA8 ControlLogix AC Output Module from Rockwell Automation is a compact 8-point digital AC output module designed for reliable switching of industrial AC loads within ControlLogix automation systems.
Built for durability and stable performance, it is commonly used to control contactors, solenoids, indicator lamps, alarms, and other AC-powered field devices in manufacturing, process automation, and machine control applications. With its robust triac-based output design and high voltage range support, the module ensures dependable operation in electrically noisy industrial environments.
It is a widely used solution for applications where high-voltage AC switching and compact I/O density are required.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-OA8 |
| Series | ControlLogix Digital Output Modules |
| Module Type | 8-Point AC Digital Output Module |
| Number of Outputs | 8 outputs |
| Output Voltage Range | 74–265V AC |
| Nominal Voltage | 120/240V AC |
| Output Type | Triac (AC switching) |
| Output Groups | 2 groups (4 points each) |
| Continuous Current per Point | 2 A (at 60°C, derating applies) |
| Continuous Current per Module | ~4 A (derated) |
| Surge Current | Up to 20 A for 43 ms per point |
| Leakage Current (Off-state) | ~3 mA per point |
| Signal Delay | ~9–11 ms |
| Isolation Voltage | 250V continuous (group-to-backplane) |
| Backplane Current (5.1V DC) | ~200 mA |
| Power Dissipation | ~5.1 W |
| Output Protection | Electronic (non-fused per point) |
| Terminal Block | 1756-TBSH / 1756-TBNH |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Weight | ~0.30–0.50 kg |
Physical Dimensions
- Size (H × W × D): 145 × 35 × 140 mm
This standard ControlLogix single-slot form factor allows easy integration into existing chassis systems without requiring additional cabinet space modifications.
Recommended Related Models
The 1756-OA8 is commonly used alongside:
- 1756-IB16 digital input module
- 1756-OB16 DC output module
- 1756-OA16 higher-density AC output module
- 1756-OW16 relay output module
- 1756-L71 / L73 ControlLogix processors
- 1756-EN2T EtherNet/IP communication modules
Popular Allen-Bradley ControlLogix Output Modules
Within the same output family, commonly used modules include:
- 1756-OA8 AC output module (8-point)
- 1756-OA16 AC output module (16-point)
- 1756-OA16I isolated AC output module
- 1756-OB16 DC output module
- 1756-OW16 relay output module
These modules provide scalable output control options for industrial automation systems of different sizes and complexity levels.
