The Allen-Bradley 1768-PA3 is a high-performance 120/240V AC power supply for 1768 CompactLogix controllers. It delivers stable backplane power to L4x series processors and up to eight 1769 I/O modules, featuring a 120VA capacity and integrated LED diagnostics for industrial automation reliability.
The Allen-Bradley 1768-PA3 serves as the primary power source for the 1768 CompactLogix system, providing essential DC power to the backplane. This module converts standard industrial AC or DC input voltages into the specific levels required by the controller and its associated modules. Because the 1768 series utilizes a high-performance architecture, this power supply is specifically keyed to support the L4x and L4xS controller families. It features an open-style design that allows for versatile mounting on either a DIN rail or a flat panel within an industrial enclosure.
Engineers implement the 1768-PA3 in automation cells that utilize the 1768-L43 or 1768-L45 motion controllers. This power supply is mandatory for configurations involving Sercos interface modules or high-speed Ethernet/IP modules that reside on the 1768 backplane. Since the unit supports a wide input voltage range, it performs reliably in global manufacturing environments where power standards fluctuate between 120V and 240V. Its ruggedized construction makes it suitable for heavy-duty process control and safety-integrated machinery.
The Allen-Bradley 1756-PA72 ControlLogix AC Power Supply provides reliable, regulated multi-rail DC power directly to the backplane of any standard 1756 chassis. Featuring a universal input voltage range of 85–265 VAC, 75 Watts of maximum output capacity, and a battery-free compact design, it delivers consistent, short-term ride-through protection and real-time LED diagnostics for high-demand industrial automation architectures.
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