{"product_id":"allen-bradley-1756-pa72-controllogix-ac-power-supply","title":"Allen-Bradley 1756-PA72 ControlLogix AC Power Supply","description":"\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe \u003cstrong\u003eAllen-Bradley 1756-PA72\u003c\/strong\u003e is a standard AC power supply designed to provide regulated backplane power directly to compatible ControlLogix chassis. Operating on a nominal input voltage of 120V or 240V AC at 50\/60 Hz, this module delivers multi-rail DC outputs across the \u003cstrong\u003e24V DC\u003c\/strong\u003e, \u003cstrong\u003e5.1V DC\u003c\/strong\u003e, \u003cstrong\u003e3.3V DC\u003c\/strong\u003e, and \u003cstrong\u003e1.2V DC\u003c\/strong\u003e lines to power processor, I\/O, and communication modules. It features \u003cstrong\u003ereinforced insulation\u003c\/strong\u003e providing continuous 250V isolation between the power input and the backplane, protecting sensitive control circuitry from line-side electrical anomalies. The unit is designed with an open-style enclosure and mounts directly on the left side of the ControlLogix chassis, utilizing internal card guides for precise alignment.\u003c\/p\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1rem;\"\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eAuto-Sensing Input\u003c\/strong\u003e: Automatically detects and adapts to 120V AC or 240V AC input line voltages without manual jumper settings.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eMulti-Output Backplane Support\u003c\/strong\u003e: Supplies simultaneous current capacities of 2.8A at 24V, 10.0A at 5.1V, 4.0A at 3.3V, and 1.5A at 1.2V up to a 100W maximum total power limit.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eHigh Isolation Voltage\u003c\/strong\u003e: Features 250V continuous reinforced insulation from the power input to the system backplane.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eVisual Status Diagnostics\u003c\/strong\u003e: Integrated green power indicator LED provides immediate local visual feedback of correct module operation.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eIntegrated Circuit Protection\u003c\/strong\u003e: Accommodates external 15A time-delay fusing on ungrounded lines to protect internal power elements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1rem;\"\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003eMain chassis power sourcing for industrial factory automation systems.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003ePowering distributed I\/O chassis in wastewater treatment, chemical processing, and packaging facilities.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0.5rem;\"\u003eInfrastructure assembly power for complex machinery using high-density ControlLogix module layouts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"border-bottom: 2px solid #1a365d; text-align: left;\"\u003e\n\u003cth style=\"padding: 0.5rem; font-weight: bold;\"\u003eAttribute\u003c\/th\u003e\n\u003cth style=\"padding: 0.5rem; font-weight: bold;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e1756-PA72\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eVoltage and Current Ratings Input\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e120\/240V AC, 50\/60 Hz, 100VA, 100W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eOutput (Current Capacity)\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e2.8 A @ 24V DC; 10.0 A @ 5.1V DC; 4.0 A @ 3.3V DC; 1.5 A @ 1.2V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eMaximum Backplane Power Load\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e75W max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eMaximum Inrush Current\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e20 A inrush max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e250V (continuous), Reinforced Insulation Type, Power Input to Backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eTemperature, Operating\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e0 degC to +60 degC (+32 degF to +140 degF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eTemperature, Surrounding Air, Max\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e60 degC (140 degF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eEnclosure Type Rating\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eNone (open-style)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eTerminal Block Screw Torque\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e0.565 N-m (5 lb-in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eWire Size\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e2.5 mm2 (14 AWG) solid or stranded copper wire rated at 90 degC (194 degF) or greater, 1.2 mm (3\/64 in.) insulation max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eNorth American Temperature Code\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eT4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eUnited States \/ USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e1.10 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003eDimensions (HxWxD), approx\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003e14.0 x 11.2 x 14.5 cm (5.51 x 4.41 x 5.71 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"border-bottom: 2px solid #1a365d; text-align: left;\"\u003e\n\u003cth style=\"padding: 0.5rem; font-weight: bold;\"\u003eTerminal Pin Number\u003c\/th\u003e\n\u003cth style=\"padding: 0.5rem; font-weight: bold;\"\u003eAC Power Supply Function\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003e1\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eL1 (High side of line power)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003e2\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eL2 (Low side of line power)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003e3\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eNot Used (Terminal is capped to prevent use)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 0.5rem; font-weight: bold;\"\u003e4\u003c\/td\u003e\n\u003ctd style=\"padding: 0.5rem;\"\u003eProtective Earth. Attach to chassis ground lug or ground bus.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe standard 1756-PA72 functions within identical chassis form-factors as the 1756-PA75 power supply, though it presents distinct total output current limits (75W maximum output versus 75W backplane limits with variance across specific rails). For systems running under extended temperature profiles or requiring conformal coatings, standard units do not substitute for the K-suffix (e.g., 1756-PA72K) or XT series variations (e.g., 1756-PA30XT) which support operating spectrums from -25 degC to +70 degC.\u003c\/p\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eA common field risk involves failure to remove the temporary protective label from the top vents of the power supply housing prior to commissioning. This label must remain intact exclusively during panel fabrication to block airborne metallic shavings from entering the module circuitry. Operating the module with the label attached blocks passive air convection, forcing thermal buildup beyond the maximum 60 degC surrounding air limit and triggering premature electrical stress or module shutdown. Additionally, users must avoid wire daisy-chaining on single terminals; use external distribution blocks for multiple line configurations.\u003c\/p\u003e\n\u003ch3 style=\"color: #1a365d; border-bottom: 2px solid #2b6cb0; padding-bottom: 0.25rem; margin-top: 1.5rem; margin-bottom: 1rem;\"\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem; color: #9b2c2c;\"\u003e\n\u003cstrong\u003eImportant Safety Notice:\u003c\/strong\u003e Remove all incoming power before installing or servicing the power supply. Do not connect or disconnect wiring while power is applied. Verify that all stored electrical energy has been discharged before handling the module.\u003c\/div\u003e\n\u003ch4\u003eInstallation Considerations\u003c\/h4\u003e\n\u003cp\u003eBefore installing the ControlLogix AC Power Supply, verify that the chassis is properly mounted and connected to protective earth ground. Disconnect all incoming power sources and follow applicable lockout\/tagout procedures before performing installation or maintenance work.\u003c\/p\u003e\n\u003ch4\u003eMounting\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the power supply on the left side of the ControlLogix chassis.\u003c\/li\u003e\n\u003cli\u003eAlign the circuit board with the chassis card guides.\u003c\/li\u003e\n\u003cli\u003eSlide the module fully into position until flush with the chassis front.\u003c\/li\u003e\n\u003cli\u003eSecure the unit using the top and bottom mounting screws.\u003c\/li\u003e\n\u003cli\u003eKeep the protective cover in place until enclosure fabrication is complete.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003ePower Wiring\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eUse 14 AWG (2.5 mm2) copper conductors rated for at least 90 degC.\u003c\/li\u003e\n\u003cli\u003eProtect ungrounded power connections with a 15 A time-delay fuse.\u003c\/li\u003e\n\u003cli\u003eTighten terminal connections to 0.565 N.m (5 lb-in).\u003c\/li\u003e\n\u003cli\u003eConnect only one conductor per terminal.\u003c\/li\u003e\n\u003cli\u003eInput voltage is automatically sensed and does not require manual voltage selection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eGrounding and Safety\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVerify proper chassis grounding before energizing the system.\u003c\/li\u003e\n\u003cli\u003eDo not connect or disconnect wiring while power is applied.\u003c\/li\u003e\n\u003cli\u003ePrevent metal shavings, dust, or debris from entering the power supply during installation.\u003c\/li\u003e\n\u003cli\u003eEnsure adequate enclosure ventilation for long-term reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStatus Indicator Check\u003c\/h4\u003e\n\u003cp\u003eThe front-panel green status indicator should remain illuminated during normal operation.\u003c\/p\u003e\n\u003cp\u003eIf the indicator is off:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVerify incoming line voltage.\u003c\/li\u003e\n\u003cli\u003eCheck backplane loading requirements.\u003c\/li\u003e\n\u003cli\u003eReseat the power supply in the chassis.\u003c\/li\u003e\n\u003cli\u003eReplace the unit if the indicator remains off after troubleshooting.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695182639467,"sku":"1756-PA72","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1756-pa72-controllogix-ac-power-supply-25dc0el1ja3_f13555e7-52e0-4f1f-a67e-ac9d6be4615f.jpg?v=1766114347","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1756-pa72-controllogix-ac-power-supply","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}