{"product_id":"1746-p3-power-supply-slc-500-series-by-allen-bradley","title":"1746-P3 Power Supply SLC 500 Series by Allen-Bradley","description":"\u003ch3\u003eProduct Introduction\u003c\/h3\u003e\n\u003cp\u003eControl engineers deploy the \u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e \u003cstrong\u003e1746-P3\u003c\/strong\u003e Series Power Supply to energize backplane modules across industrial automation architectures. This dedicated \u003cstrong\u003e1746-P3\u003c\/strong\u003e unit converts a 24 VDC input into regulated internal outputs of 3.6 A at 5 VDC and 0.87 A at 24 VDC. \u003cstrong\u003eGlobal PLC Spare HUB's Insight\u003c\/strong\u003e: Panel builders frequently choose this specific DC supply variant for remote skid-mounted enclosures where direct 24V bus architectures eliminate the need for bulky AC step-down transformers.\u003c\/p\u003e\n\u003ch3\u003eConfiguration Breakdown \u0026amp; Technical Parameters\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem Parameter\u003c\/th\u003e\n\u003cth\u003eTechnical Specification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand \u0026amp; Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e \/ \u003ca href=\"https:\/\/www.plcsparehub.com\/collections\/allen-bradley-slc-500-plc-modules\"\u003e\u003cstrong\u003eSLC 500\u003c\/strong\u003e Series\u003c\/a\u003e \/ \u003cstrong\u003e1746-P3\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCatalog Number \/ Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1746-P3\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e19.2 to 28.8 VDC (Nominal 24 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackplane Current Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.6 A at 5 VDC, 0.87 A at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLine Power \u0026amp; Inrush\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e90 VA typical requirement; 20 A inrush current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCPU Hold-Up Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 ms at full load; 1000 ms at no load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuse Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePre-installed 1746-F3 (or equivalent like Bussmann AGC 5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePhysical \u0026amp; Thermal Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWeighs 1.1 kg; Operating range 0°C to 60°C (derate 5% above 55°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003ePacking List \u0026amp; Warranty\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOne \u003cstrong\u003eAllen-Bradley\u003c\/strong\u003e \u003cstrong\u003e1746-P3\u003c\/strong\u003e Power Supply module\u003c\/li\u003e\n\u003cli\u003ePre-installed \u003cstrong\u003e1746-F3\u003c\/strong\u003e fuse protection element\u003c\/li\u003e\n\u003cli\u003eFactory inspection certificate and official 12-month warranty documentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation \u0026amp; Maintenance Guidelines\u003c\/h3\u003e\n\u003cdiv\u003eMount the module strictly on the left-most slot of the 1746 chassis, noting that it consumes zero usable I\/O slots.\u003c\/div\u003e\n\u003cdiv\u003eEnsure the input voltage remains within 19.2 to 28.8 VDC to prevent premature CPU brownout restarts.\u003c\/div\u003e\n\u003cdiv\u003eObserve ESD precautions by storing the unit in static-shield packaging and avoiding direct contact with connector pins.\u003c\/div\u003e\n\u003cdiv\u003eMaintain a 1\/8-inch flat-head and 1\/4-inch Phillips screwdriver on hand for secure terminal block wiring.\u003c\/div\u003e\n\u003ch3\u003eCompatibility \u0026amp; Certifications\u003c\/h3\u003e\n\u003cdiv\u003eFully compatible with all Allen-Bradley SLC 500 modular control system chassis architectures.\u003c\/div\u003e\n\u003cdiv\u003eCertified by Underwriters Laboratories (UL) and C-UL for Class 1, Division 2 hazardous locations (Groups A, B, C, D).\u003c\/div\u003e\n\u003cdiv\u003eDesigned for Pollution Degree 2 environments and Installation Category II applications up to 2000 meters altitude.\u003c\/div\u003e\n\u003ch3\u003eShipping \u0026amp; Logistics\u003c\/h3\u003e\n\u003cdiv\u003eGlobal express courier delivery supported via DHL, FedEx, and UPS networks.\u003c\/div\u003e\n\u003cdiv\u003ePriority order processing ensures warehouse dispatch within 24 to 48 hours.\u003c\/div\u003e\n\u003cdiv\u003eIndustrial-grade packaging secures internal electronics and terminal blocks against transit damage.\u003c\/div\u003e\n\u003ch3\u003eTypical Applications \u0026amp; Diagnostic Capabilities\u003c\/h3\u003e\n\u003cdiv\u003eContinuous DC power distribution for discrete and analog manufacturing automation lines.\u003c\/div\u003e\n\u003cdiv\u003eWastewater treatment facility automation panels requiring hazardous location compliance.\u003c\/div\u003e\n\u003cdiv\u003eRapid identification of input voltage sag via CPU hold-up monitoring during momentary line drops.\u003c\/div\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion:\u003c\/strong\u003e What causes the \u003cstrong\u003e1746-P3\u003c\/strong\u003e to trigger an internal fuse blowout during startup?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnswer:\u003c\/strong\u003e Excessive inrush current spikes or severe short circuits on the external 24V field wiring loop typically rupture the 1746-F3 fuse element.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion:\u003c\/strong\u003e How does temperature derating impact current capacity on the \u003cstrong\u003e1746-P3\u003c\/strong\u003e module?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnswer:\u003c\/strong\u003e Operating the power supply above 55°C requires a 5% current capacity reduction to prevent thermal overload inside closed control cabinets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion:\u003c\/strong\u003e Can maintenance technicians utilize alternative fuses instead of the specified \u003cstrong\u003e1746-F3\u003c\/strong\u003e?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnswer:\u003c\/strong\u003e Yes, approved electrical equivalents such as the Bussmann AGC 5 or Nagasawa ULCS-61ML-5 fuse provide identical protection characteristics.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion:\u003c\/strong\u003e Why does the \u003cstrong\u003e1746-P3\u003c\/strong\u003e include a 5 ms hold-up time under full load conditions?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnswer:\u003c\/strong\u003e The hold-up circuit sustains internal DC rails long enough for the CPU to safely register an impending power loss without corrupting active program memory.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuestion:\u003c\/strong\u003e What mounting restriction applies when installing the \u003cstrong\u003e1746-P3\u003c\/strong\u003e in a standard chassis?\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnswer:\u003c\/strong\u003e The unit must occupy the extreme left side of the 1746 rack, where it connects directly to the power bus without consuming standard I\/O slot space.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45013986181302,"sku":"1746-P3","price":129.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/1746-P3_442683ff-b897-4e42-b65f-4ac346af4118.jpg?v=1784790058","url":"https:\/\/www.plcsparehub.com\/products\/1746-p3-power-supply-slc-500-series-by-allen-bradley","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}