{"product_id":"1756-pb72-allen-bradley-controllogix-24v-dc-power-supply","title":"Alimentation 24V DC ControlLogix Allen-Bradley 1756-PB72","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan\u003e1756-PB72\u003c\/span\u003e is a high-performance \u003cspan\u003e24V DC Power Supply\u003c\/span\u003e designed for the Allen-Bradley \u003cspan\u003eControlLogix 1756\u003c\/span\u003e chassis system. This module is responsible for converting an external 24V DC source into the specific backplane voltages (1.2V, 3.3V, 5.1V, and 24V DC) required to power ControlLogix processors, I\/O modules, and communication adapters. Engineered for maximum reliability in industrial environments, the \u003cspan\u003e1756-PB72\u003c\/span\u003e provides enhanced ride-through capabilities and robust protection against electrical transients, ensuring stable operation for critical control architectures.\u003c\/p\u003e\n\u003ch3\u003eFunctional Engineering \u0026amp; Load Capacity\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan\u003e1756-PB72\u003c\/span\u003e is designed to support high-density chassis configurations. It provides a total current capacity of \u003cspan\u003e13 Amps at 5.1V DC\u003c\/span\u003e and \u003cspan\u003e2.8 Amps at 24V DC\u003c\/span\u003e to the backplane. Its \"slim\" yet powerful design allows it to be mounted on the left side of any standard 1756 chassis (4, 7, 10, 13, or 17-slot), efficiently distributing power across the entire backplane. The module features integrated circuit protection and a front-panel status LED, allowing maintenance teams to instantly verify the health of the DC input and internal conversion logic.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"692\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003e\u003cspan\u003eAttribute\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eSpecification Details\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1756-PB72\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInput Voltage Range\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e18–32V DC (24V DC Nominal)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInput Power (Max)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e95 Watts\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOutput Power (Max)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e75 Watts @ 60°C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBackplane Current (5.1V)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e13 Amps\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBackplane Current (24V)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.8 Amps\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInrush Current\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e30 Amps (Max)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 °C to +60 °C (32 °F to +140 °F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eIsolation Voltage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e250V (Continuous), Reinforced Insulation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eDimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e140 x 112 x 145 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eWhat is the \"Hold-up Time\" for the 1756-PB72?\u003c\/span\u003eThe module is designed with a hold-up time of approximately \u003cspan\u003e35ms @ 24V DC\u003c\/span\u003e. This ensures that the ControlLogix processor can perform an orderly shutdown or \"ride through\" momentary power sags and micro-interruptions without causing a system fault or losing volatile data.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCan I use the 1756-PB72 in a redundant power configuration?\u003c\/span\u003eNo. The \u003cspan\u003e1756-PB72\u003c\/span\u003e is a standard power supply. For redundancy, you would require the \u003cspan\u003e1756-PB72R\u003c\/span\u003e (Redundant) power supply along with a \u003cspan\u003e1756-CPR2\u003c\/span\u003e cable and a \u003cspan\u003e1756-PSCA2\u003c\/span\u003e chassis adapter. The standard PB72 is intended for single-supply applications where high amperage is required but physical redundancy is not a project mandate.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHow do I calculate if the 1756-PB72 is sufficient for my chassis?\u003c\/span\u003eYou must sum the backplane current requirements (at 5.1V and 24V) for every module in your chassis. If the total exceeds 13A at 5.1V or 2.8A at 24V, the system may experience intermittent resets. Rockwell Automation’s \u003cspan\u003eIntegrated Architecture Builder (IAB)\u003c\/span\u003e is the recommended tool for performing these power budget calculations accurately.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Engineering \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eWiring Requirements:\u003c\/span\u003e Use a minimum of \u003cspan\u003e14 AWG (2.5 mm²)\u003c\/span\u003e solid or stranded copper wire rated for at least 75°C for the DC input connections. Ensure the 24V DC source is properly fused or protected by a circuit breaker to prevent damage during a sustained overcurrent event.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eChassis Attachment:\u003c\/span\u003e The power supply mounts to the left end of the 1756 chassis. Ensure the two chassis mounting screws are tightened to the specified torque (\u003cspan\u003e1.16 N•m\u003c\/span\u003e) to maintain a solid ground connection, which is vital for the module's internal EMI filtering.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eEnvironmental Clearance:\u003c\/span\u003e Maintain a minimum of \u003cspan\u003e2 inches (50 mm)\u003c\/span\u003e of clearance above and below the power supply for airflow. Excessive heat is the primary cause of power supply failure; ensuring proper convection cooling will significantly extend the life of the internal electrolytic capacitors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan\u003e1756-PB72\u003c\/span\u003e offers a robust and space-efficient power solution for DC-powered control cabinets. Its high isolation rating (\u003cspan\u003e250V continuous\u003c\/span\u003e) ensures that field-side electrical noise and ground loops do not reach the sensitive backplane electronics. For B2B procurement, choosing the original \u003cspan\u003eAllen-Bradley 1756-PB72\u003c\/span\u003e ensures full compatibility with the 1756 chassis series and maintains the system's UL, CSA, and CE certifications, providing a reliable foundation for any ControlLogix-based automation project.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695191159147,"sku":"1756-PB72","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1756-pb72-controllogix-power-supply-s0s0q1qlgv1_71592750-ece1-4854-b42d-e49c0a12ed1d.jpg?v=1766114634","url":"https:\/\/www.plcprotech.com\/fr\/products\/1756-pb72-allen-bradley-controllogix-24v-dc-power-supply","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}