Allen-Bradley 1756-OA8E AC output module

The Allen-Bradley 1756-OA8E serves as a high-performance discrete output solution for the ControlLogix chassis platform. This module features eight independent channels organized into two groups of four. It delivers a nominal 120V AC output with a broad operating window ranging from 74V to 132V AC. Because industrial uptime is critical, the 1756-OA8E includes individual electronic fusing for every output point. This advanced protection prevents a single field-side fault from damaging the module or interrupting the rest of the system.

Advanced Thermal Management and Fast Switching

Efficiency and speed define the 1756-OA8E architecture. The module achieves a swift transition time of approximately 9.3ms at 60 Hz, which ensures responsive control of valves, motor starters, and actuators. While handling heavy loads, the unit manages heat effectively with a thermal dissipation of 18.76 BTU/hr. At 30°C, the module supports a maximum combined current of 8A, though this capacity derates to 4A at 60°C. Furthermore, the hardware manages high-demand startups by supporting a 20A surge current for 43ms.

Technical Specifications