{"product_id":"1746-p3-allen-bradley-slc-500-24v-dc-chassis-power-supply","title":"1746-P3 | Allen Bradley | SLC 500 24V DC Chassis Power Supply","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen Bradley 1746-P3\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides regulated DC power to the SLC 500 backplane, supporting both the processor and various I\/O modules within a 1746 chassis. This module converts a 24V DC nominal input into the specific voltages required for internal logic and field-side communication. Designed for high-availability environments, it fits exclusively into the leftmost slot of any 1746 chassis. We supply this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Factory Original\u003c\/strong\u003e, ensuring your legacy systems maintain peak electrical stability.\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\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification Details\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Voltage Range\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e19.2–28.8V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNominal Input Voltage\u003c\/strong\u003e\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\u003e\u003cstrong\u003eBackplane Current Capacity (5V DC)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3.6 Amps\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eBackplane Current Capacity (24V DC)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.87 Amps\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInrush Current\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e20 Amps\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTypical Line Power Requirement\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e90 VA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eInput Power\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e61 Watts\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eIsolation Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e600V AC RMS for 1 second\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eFuse Protection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1746-F3 or equivalent\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 to 60 °C (32 to 140 °F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOptimized DC Grid Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1746-P3 operates on a wide 19.2–28.8V DC range, allowing direct integration into 24V DC battery-backed systems or industrial DC grids. This eliminates the need for AC\/DC converters, reducing heat signatures within the enclosure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSuperior Backplane Support:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWith a 3.6A capacity at 5V DC, this power supply drives high-density I\/O modules and advanced communication processors without voltage sag. It maintains logic integrity even when the chassis reaches maximum module capacity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Voltage Isolation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe Version B (and later) hardware provides 600V AC RMS isolation. This shield protects sensitive SLC 500 processors from transients and ground loops common in heavy industrial switching environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Resiliency:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe unit operates reliably up to 60 °C. While many power supplies fail under summer peak loads, the 1746-P3 maintains 95% of its current capacity at 55 °C, ensuring continuous uptime in non-climate-controlled cabinets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFail-Safe Protection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAn internal 1746-F3 fuse prevents catastrophic failures during overcurrent events. The module's 5ms hold-up time filters out brief voltage dips, preventing nuisance processor trips.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I install the 1746-P3 in any slot of the SLC 500 chassis?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The 1746-P3 must occupy the dedicated power supply slot located on the far left side of the 1746 chassis. It features a unique physical form factor that prevents incorrect installation into standard I\/O slots.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat should I consider when operating above 55 °C?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1746-P3 requires a current capacity derating of 5% for every degree above 55 °C. If your cabinet ambient temperature reaches 60 °C, calculate your total backplane load to ensure it does not exceed the derated capacity of 3.42A at 5V DC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this unit compatible with AC-input SLC 500 systems?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1746-P3 is a DC-input module. While it physically fits the same chassis as the 1746-P1 or P2 (AC units), you must provide a 24V DC source. Ensure your wiring matches the DC polarity requirements to avoid blowing the internal fuse.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a brand new Allen Bradley original?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. We guarantee this 1746-P3 is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ein its original factory packaging. We do not sell refurbished or \"New-Old-Stock\" with degraded capacitors; you receive a factory-fresh unit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53447059243192,"sku":"1746-P3","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1746-P32.jpg?v=1778228782","url":"https:\/\/www.globalpetroparts.com\/products\/1746-p3-allen-bradley-slc-500-24v-dc-chassis-power-supply","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}