1756-pa75_a_power_supply

Technical Specifications

Main Features and Advantages

Wide Input Range and Robust Protection: The 1756‑PA75/A​ accepts a broad input voltage range (85–265 V AC), making it suitable for global use without requiring manual voltage taps. It incorporates advanced surge suppression and inrush current limiting to handle harsh electrical environments. The module provides comprehensive protection against overvoltage, overload, and short‑circuit conditions, safeguarding both the power supply itself and the sensitive ControlLogix modules downstream. Its reinforced insulation and high isolation rating ensure operator safety and system integrity.High Efficiency and Thermal Management: Designed for continuous duty, the 1756‑PA75/A​ delivers up to 75 W of output power with high efficiency, minimizing heat generation. It utilizes a convection‑cooled design (fanless) for silent operation and enhanced reliability by eliminating moving parts. The module is rated for full power operation up to 60 °C, making it suitable for high‑ambient temperature environments commonly found in industrial control panels.Seamless Integration and Diagnostics: As a native ControlLogix component, the 1756‑PA75/A​ integrates mechanically and electrically with all standard 1756 chassis (Series A, B, and C). It features a clear “Power OK” LED indicator for immediate visual status confirmation, enabling quick fault diagnosis during startup and operation. The module’s predictable power budget and compatibility with Rockwell Automation’s selection tools simplify system design and load calculation.

Application Field

The 1756‑PA75/A​ is the standard power solution for a wide range of ControlLogix‑based automation systems. In discrete manufacturing, it powers machine control cabinets for automotive assembly lines, packaging machinery, and material handling systems, where its 24 V DC output rail often supplies sensors and actuators directly. For process industries such as chemical processing and water/wastewater treatment, the module’s wide input voltage tolerance ensures stable operation in facilities with fluctuating grid power.In infrastructure applications like power generation plants and HVAC control for large buildings, the 1756‑PA75/A​ provides the critical backbone power for supervisory control and data acquisition (SCADA) nodes. It is also commonly used in batch processing and food & beverage production, where reliable power is essential for maintaining recipe control and production traceability. The module is typically specified for chassis configurations requiring moderate I/O counts, where the 75 W power budget is sufficient to energize a controller, several communication adapters, and a mix of digital and analog I/O modules.