{"product_id":"1756-pb50-allen-bradley-controllogix-power-supplies","title":"1756-PB50 Allen-Bradley ControlLogix Power Supplies","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-PB50\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a highly reliable DC-input power supply unit specifically designed for the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eControlLogix\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003earchitecture. Engineered to deliver stable, high-performance power to the chassis backplane, this unit is essential for maintaining the operational integrity of complex automation systems in demanding industrial environments. As a standard DC power supply, the 1756-PB50 accepts a nominal input of 24V DC (range: 18–32V DC) and provides a total power output of 60W, ensuring consistent energy delivery to I\/O modules, communication bridges, and processor controllers installed within the chassis.\u003c\/p\u003e\n\u003cp\u003eUnlike standard I\/O modules, the 1756-PB50 is engineered for a unique installation position: it mounts directly to the leftmost side of any 1756 ControlLogix chassis, effectively serving as the backbone of the rack’s electrical infrastructure. Its advanced features, including \"Hold-Up\" time capability, protect the system from transient voltage drops, ensuring that control logic remains active even during minor power fluctuations. With ruggedized construction and compliance with rigorous vibration and thermal standards, this power supply is the gold standard for decentralized process plants, automotive manufacturing lines, and aerospace assembly stations where downtime is not an option.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\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-PB50\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eManufacturer\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen-Bradley\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSeries\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eControlLogix\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePower Supplies\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInput Voltage (Nominal)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24V DC\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\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMax Input Power\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e85W (@50°C) \/ 70W (@60°C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMax Output Power\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e60W (@50°C) \/ 50W (@60°C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eInrush Current (Max)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e30 A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCurrent Capacity @ 1.2V\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.5 A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCurrent Capacity @ 3.3V\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.0 A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCurrent Capacity @ 5.1V\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8.0 A (@50°C) \/ 6.0 A (@60°C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCurrent Capacity @ 24V\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2.5 A (@50°C) \/ 2.0 A (@60°C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temperature\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0°C to +60°C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHumidity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 - 95% noncondensing\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.80 kg\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\u003e14.0 x 36.6 x 14.5 cm (Approx 5.51 x 3.07 x 5.71 in)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eModel Configuration Explanation\u003c\/h3\u003e\n\u003cp\u003eThe 1756-PB50 designation provides a precise roadmap for system integration:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e1756:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIdentifies the ControlLogix system hardware family.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eP:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDesignates the module as a Power Supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eB:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSpecifies the input type, with 'B' representing DC power (24V DC).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e50:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDenotes the power tier\/capacity rating (50 series classification), ensuring engineers match the module to the total power budget of the chassis.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAutomotive \u0026amp; Aerospace:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePowers centralized assembly stations, robotics, and safety-rated motion control systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFood \u0026amp; Beverage:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIdeal for stainless steel, temperature-controlled panels requiring decentralized process control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWater \u0026amp; Wastewater Treatment:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProvides reliable power to remote, decentralized I\/O chassis in outdoor or harsh process environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHeavy Machinery:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSupports complex ControlLogix racks used in packaging, material handling, and high-speed sorting applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSystem Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe 1756-PB50 is fully compatible with the entire range of ControlLogix chassis, including 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17 (Series A, B, and C). It is designed to power any combination of I\/O, communication, and specialty modules within these racks. Because it occupies the leftmost position of the chassis (outside the standard module slot numbering), it does not compete for space with PLC or communication cards, allowing for maximum rack utilization.\u003c\/p\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMounting Protocol:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAlign the power supply circuit board with the card guides located on the far left side of the chassis. Slide the module back until it is fully flush with the front of the chassis.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTerminal Connections:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eConnect the positive DC lead to Terminal 1 (DC+) and the negative lead to Terminal 2 (DC-). Terminal 3 remains unused.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWiring Standards:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUtilize 14 AWG (2.5 mm²) solid or stranded copper wire rated for 90°C (194°F) or higher. Ensure insulation thickness does not exceed 1.2 mm.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCable Retention:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUtilize the integrated V-groove on the front of the supply to route the power cable, and secure it with a cable tie to prevent strain on the terminals.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEnvironment:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnsure the unit is installed in an environment with adequate airflow, adhering to the 0-60°C temperature range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHold-Up Time:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOffers significant protection against power grid instability; the unit maintains operations for 30–40 ms during voltage dips.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIsolation Excellence:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eProvides 250V continuous isolation, ensuring that backplane logic is shielded from external power noise.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum Rack Density:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIts unique external left-side mounting preserves precious rack space, allowing more modules to be installed per chassis.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eScalable Compatibility:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWorks across all major ControlLogix chassis series (A, B, C), making it a versatile choice for both legacy system maintenance and new installations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e1756-PB50 DC ControlLogix Power Supply module.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNote: This unit does not come with mounting screws or cable ties; check chassis documentation for necessary hardware. Order spare terminal blocks separately if needed for field maintenance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003eDoes the 1756-PB50 take up a module slot in the chassis?\u003c\/p\u003e\n\u003cp\u003eNo. The power supply mounts to the extreme left of the chassis, effectively leaving all standard module slots open for your CPU and I\/O cards.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat happens if the input voltage drops below 18V DC?\u003c\/p\u003e\n\u003cp\u003eThe module may cease operation. However, the internal \"Hold-Up\" time feature provides enough energy to maintain system stability for a short duration during minor dips.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan I use this power supply with an AC-powered chassis?\u003c\/p\u003e\n\u003cp\u003eNo. This is a dedicated DC (18-32V) input module. Attempting to connect AC voltage will cause permanent damage. Use the 1756-PA series for AC requirements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhat does the \"Series A, B, C\" compatibility mean?\u003c\/p\u003e\n\u003cp\u003eIt signifies the module is designed to fit and function within various generations of ControlLogix chassis architectures, ensuring long-term support for your equipment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhy is there a difference in output power at 50°C vs 60°C?\u003c\/p\u003e\n\u003cp\u003eIndustrial electronics undergo thermal derating. At higher temperatures (60°C), the power supply must reduce its output wattage (50W) to prevent component overheating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIs the 1756-PB50 suitable for redundant power configurations?\u003c\/p\u003e\n\u003cp\u003eYes, you can install a second power supply on the far right of the chassis for redundancy, provided you have a chassis designed to support dual power supplies.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHow do I know if the power supply is failing?\u003c\/p\u003e\n\u003cp\u003eMonitor the LED indicators on the front panel. A loss of power or flashing status often indicates a fault or an input voltage that is out of the required range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCan I use this supply to power 24V field devices?\u003c\/p\u003e\n\u003cp\u003eWhile it provides 24V DC to the chassis backplane for modules, you should not exceed the current capacity limits (2.5A) if drawing power for external field devices.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066421498029,"sku":"1756-PB50","price":159.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1756-PB50.jpg?v=1781172542","url":"https:\/\/www.maxwellplc.com\/products\/1756-pb50-allen-bradley-controllogix-power-supplies","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}