{"product_id":"1747-l542-allen-bradley-slc-5-04-cpu-processor-unit-slc-500","title":"1747-L542 | Allen-Bradley SLC 5\/04 CPU Processor Unit |  SLC 500","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1747-L542\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003erepresents the high-performance tier of the SLC 500 family, specifically the SLC 5\/04 controller. This processor manages complex automation tasks by providing a massive\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e32K word memory\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecapacity and a rapid execution speed of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e0.9 ms\/K scan time\u003c\/strong\u003e. It excels in high-speed communication via its built-in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eData Highway Plus (DH+)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eport, allowing seamless integration into existing plant-wide networks. We offer this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e, ensuring the internal lithium battery and memory circuits possess their full factory lifespan for your critical machine control applications.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 1747-L542 provides the computational power necessary for large-scale I\/O configurations:\u003c\/p\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\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\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen-Bradley \/ Rockwell Automation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProcessor Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSLC 5\/04\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eUser Memory\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e32K Words\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMax. I\/O Capacity\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4096 Discrete Inputs \/ 4096 Discrete Outputs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eLocal Chassis Support\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eUp to 3 Chassis (Max 30 Slots)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProgramming Instructions\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e107 Standard Instructions\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTypical Scan Time\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.9 ms per 1K words\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\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e4 Watts (Minimum Watts Rating)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eOperating Shock\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e30 G\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCommunication Ports\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDH+ and RS-232 (DF1\/DH-485)\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\u003eHigh-Speed Network Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe integrated DH+ port facilitates high-speed peer-to-peer communication and data acquisition. This enables the 1747-L542 to exchange data with other SLC 5\/04 or PLC-5 processors significantly faster than standard DH-485 modules.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExpanded I\/O Handling:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis processor controls up to 4,096 discrete I\/O points across a maximum of 30 local slots. This high density allows engineers to consolidate multiple small controllers into a single, powerful 1747-L542 unit, simplifying program management.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eComplex Instruction Execution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWith 107 built-in instructions, the SLC 5\/04 handles advanced floating-point math, PID loops, and indirect addressing. This computational depth supports sophisticated process control that basic micro-controllers cannot execute.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIndustrial Durability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEngineered to withstand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e30 G of operating shock\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand relative humidity up to 95%, this processor maintains stable operation in heavy-vibration environments such as stamping presses or high-speed packaging lines.\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\u003eQ: Can the 1747-L542 replace a 1747-L541 processor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYes. The 1747-L542 offers 32K words of memory, which exceeds the 16K words found in the 1747-L541. Your existing program will run on the L542 without modifications, provided you update the processor type in your RSLogix 500 project configuration.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the module include a backup battery for memory retention?\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYes. As a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eunit, it includes a factory-installed lithium battery (typically 1747-BA). We recommend verifying the battery status LED upon initial power-up to ensure non-volatile memory protection.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What software do I need to program this SLC 5\/04 unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou require\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eRSLogix 500\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esoftware. For communication, you can use the DH+ port with a 1784-U2DHP converter or the RS-232 port with a standard null-modem cable.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is there a risk of memory loss if I store this unit for a long period?\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBecause we sell\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBrand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eunits, the internal components remain in peak condition. However, for long-term storage, we recommend checking the battery every 2 years to prevent data loss in the RAM once the unit is programmed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53286144016568,"sku":"1747-L542","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1747-L542.jpg?v=1775815314","url":"https:\/\/www.globalpetroparts.com\/products\/1747-l542-allen-bradley-slc-5-04-cpu-processor-unit-slc-500","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}