{"product_id":"1756-pa72-allen-bradley-controllogix-ac-power-supply","title":"1756-PA72 Allen-Bradley ControlLogix AC Power Supply","description":"\u003ch3\u003e\n\u003cb\u003e1756-PA72\u003c\/b\u003e Engineering Architecture \u0026amp; Power Backplane Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cb\u003e\u003cb\u003e1756-PA72\u003c\/b\u003e\u003c\/b\u003e standard AC power supply from \u003cb\u003eAllen-Bradley\u003c\/b\u003e (Rockwell Automation) is engineered to energize the backplane of \u003cb\u003e\u003cb\u003eControlLogix\u003c\/b\u003e\u003c\/b\u003e 1756 chassis platforms. Operating across an input voltage range of 85-265V AC, this robust module delivers a total continuous output power of 75W at 0 to 60 °C. It mounts directly onto the leftmost dedicated slot of the chassis without consuming any standard I\/O module slots, making it a critical foundation for distributed control architectures and industrial automation networks.\u003c\/p\u003e\n\u003cp\u003eGlobal PLC Spare HUB's Insight: When designing high-density controller racks housing multiple communication and motion modules, deploying the \u003cb\u003e\u003cb\u003e1756-PA72\u003c\/b\u003e\u003c\/b\u003e ensures stable current distribution across 3.3V, 5.1V, and 24V rails while mitigating voltage sag during transient electrical loads in heavy manufacturing plants.\u003c\/p\u003e\n\u003ch3\u003e\n\u003cb\u003e1756-PA72\u003c\/b\u003e Configuration Specifications \u0026amp; Electrical Matrix\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%; border-color: #d1d5db;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f3f4f6;\"\u003e\n\u003cth style=\"text-align: left;\"\u003eEngineering Parameter\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003eTechnical Specification Details\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eBrand \u0026amp; Part Number\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cb\u003eAllen-Bradley\u003c\/b\u003e \u003cb\u003e\u003cb\u003e1756-PA72\u003c\/b\u003e\u003c\/b\u003e (\u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-1756-controllogix\"\u003e\u003cb\u003e\u003cb\u003eControlLogix Series\u003c\/b\u003e\u003c\/b\u003e\u003c\/a\u003e)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eInput Voltage \u0026amp; Frequency\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e85-265V AC nominal (120V\/240V AC), 47-63 Hz input frequency range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eDC Current Capacity Rails\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e4.0A at 3.3VDC; 10.0A at 5.1VDC; 2.8A at 24VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003ePower Output \u0026amp; Dissipation\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e75W max output power; 25W power dissipation (85.3 BTU\/hour thermal output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eChassis Compatibility\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eMounts on the left side of 1756-A4, A7, A10, A13, and A17 chassis (Series A, B, and C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSystem Diagnostics \u0026amp; Power Fault Protection\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eHold-Up Time Supervision\u003c\/b\u003e: Provides between 5 to 6 cycles of hold-up time across 85V to 240V AC inputs, maintaining control processor stability during brief line voltage dips or AC brownouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOvercurrent Safeguards\u003c\/b\u003e: Features built-in overcurrent protection with user-supplied fusing up to 15A max to protect internal backplane traces from short-circuit damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReinforced Isolation\u003c\/b\u003e: Tested with 3500V DC reinforced insulation for 60 seconds alongside 250V continuous voltage isolation to safeguard low-voltage logic circuits from line surges.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTarget Equipment Compatibility \u0026amp; Industrial Application Scenarios\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCompatible Hardware\u003c\/b\u003e: Allen-Bradley 1756 ControlLogix backplanes, 1756-L series controllers, and distributed digital I\/O expansion racks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eApplication Scenarios\u003c\/b\u003e: Continuous chemical processing lines, automotive assembly conveyor systems, power generation auxiliary controls, and heavy metal stamping plants.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty, Packaging \u0026amp; Express Logistics\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePackaging Details\u003c\/b\u003e: Factory-boxed \u003cb\u003e\u003cb\u003e1756-PA72\u003c\/b\u003e\u003c\/b\u003e power supply unit complete with terminal block cover and installation guidelines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eQuality Assurance\u003c\/b\u003e: Backed by a comprehensive 12-month commercial warranty covering electrical and mechanical defects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGlobal Shipping\u003c\/b\u003e: 24 to 48-hour expedited fulfillment via \u003cb\u003eFedex\u003c\/b\u003e, \u003cb\u003eUPS\u003c\/b\u003e, and \u003cb\u003eDHL\u003c\/b\u003e global carrier networks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSelection Guide \u0026amp; Engineering Comparison\u003c\/h3\u003e\n\u003cp\u003eSelecting the correct ControlLogix power supply requires calculating the total current draw of all modules slotted into your chassis across the 3.3V, 5.1V, and 24V rails. The \u003cb\u003e\u003cb\u003e1756-PA72\u003c\/b\u003e\u003c\/b\u003e provides a dependable AC-powered solution for standard non-redundant racks. System designers should verify that total module current consumption does not exceed the 10A limit on the 5.1V rail before finalizing hardware procurement.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: Does the \u003cb\u003e\u003cb\u003e1756-PA72\u003c\/b\u003e\u003c\/b\u003e occupy a standard slot inside the ControlLogix chassis?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: No, the power supply mounts externally on the dedicated leftmost slot of the 1756 chassis and plugs directly into the backplane, leaving all standard slots open for I\/O and processor modules.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: What enclosure requirements must be met when installing this power supply?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Because the module features an open-type enclosure, it must be installed inside a tool-accessible NEMA\/IEC rated cabinet to protect circuitry from industrial dust, moisture, and conductive contaminants.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: How does input frequency variation between 47Hz and 63Hz impact power output?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: The power supply regulates output voltage smoothly across standard global utility frequencies without de-rating its 75W continuous thermal capacity.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: Can the \u003cb\u003e\u003cb\u003e1756-PA72\u003c\/b\u003e\u003c\/b\u003e be utilized in redundant power supply configurations?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: No, this model is designed for single-supply standard architectures; redundant applications require specialized split-bus power supply modules.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQ: What maintenance steps are recommended to prevent thermal shutdown in high-temperature panels?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA: Ensure adequate vertical clearance above and below the chassis inside the enclosure, and verify that ambient cabinet temperature remains below the 60 °C maximum operating threshold.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013810380982,"sku":"1756-PA72","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1756-PA72.jpg?v=1787734285","url":"https:\/\/www.plcsparehub.com\/products\/1756-pa72-allen-bradley-controllogix-ac-power-supply","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}