{"product_id":"allen-bradley-1747-l542-slc-5-04-32kb-modular-cpu-processor-unit","title":"Allen-Bradley 1747-L542 SLC 5\/04 32KB Modular CPU Processor Unit","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #0056b3;\"\u003e1747-L542\u003c\/strong\u003e is an advanced SLC 5\/04 modular processor unit engineered by Allen-Bradley (Rockwell Automation) for the SLC 500 hardware series. Installed in slot zero (0) of compatible modular chassis, this controller features 32 KB of battery-backed user RAM (32,000 words total capacity split into 4K data and 28K program storage) and supports up to 4,096 discrete inputs, 4,096 discrete outputs, and 480 analog I\/O points across a maximum of 3 local chassis and 30 slots. Equipped with built-in RS-232 and Data Highway Plus (DH+) communication ports, it delivers rapid performance with a 0.9 ms\/K typical program scan time and a backplane current draw of 1 A at 5 V DC and 175 mA at 24 V DC.\u003c\/p\u003e\n\n\u003ch2\u003eCore Technical Advantages\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh I\/O Capacity:\u003c\/strong\u003e Manages up to 4,096 discrete inputs, 4,096 discrete outputs, and 480 analog channels across 30 local slots.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Dual Communication:\u003c\/strong\u003e Features native RS-232 and Data Highway Plus (DH+) ports for seamless HMI, SCADA, and peer-to-peer messaging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobust Memory \u0026amp; Diagnostics:\u003c\/strong\u003e Combines 32 KB battery-backed RAM (1747-BA) with comprehensive status LEDs for run, fault, battery, and port activity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #f2f2f2;\"\u003e\n      \u003cth style=\"border: 1px solid #dddddd; padding: 8px; text-align: left;\"\u003eParameter\u003c\/th\u003e\n      \u003cth style=\"border: 1px solid #dddddd; padding: 8px; text-align: left;\"\u003eSpecification Details\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eBrand \u0026amp; Manufacturer\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eAllen-Bradley (Rockwell Automation)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eSeries \u0026amp; Module Type\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eSLC 500 Series \/ SLC 5\/04 Processor\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eCatalog \/ Part Number\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e1747-L542\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eUser Memory Capacity\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e32 KB \/ 32,000 Words (Battery-Backed RAM)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eDiscrete I\/O Points\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e4,096 Inputs and 4,096 Outputs (Max)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eAnalog I\/O Points\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e480 Maximum Local Analog I\/O\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eChassis \u0026amp; Slot Capacity\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eMax 3 Local Chassis \/ 30 Slots Total\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eProcessing \u0026amp; Scan Times\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eProgram Scan: 0.9 ms\/Kword; I\/O Scan: 0.225 ms; Bit Execution: 0.37 ms\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eCommunication Ports\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eData Highway Plus (DH+) and RS-232\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eMemory Backup Options\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eBattery Backup (1747-BA) \/ Flash EPROM (1747-M13)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eBackplane Current Draw\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e1 A at 5 V DC and 175 mA at 24 V DC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eOperating Ambient Temperature\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e0°C to 60°C (32°F to 140°F)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003e\u003cstrong\u003eProduct Net Weight\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eApprox. 0.45 kg (1.00 lbs)\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eIndustrial Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiscrete Manufacturing Plants:\u003c\/strong\u003e Coordinates large-scale sequential automation across multi-chassis production lines.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProcess Control \u0026amp; SCADA Nodes:\u003c\/strong\u003e Interfaces local machinery with supervisory HMI and control networks via DH+.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLegacy System Upgrades:\u003c\/strong\u003e Replaces older SLC 500 processors to expand program memory and communication bandwidth.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWiring \u0026amp; Installation\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSlot Placement:\u003c\/strong\u003e Insert the 1747-L542 processor securely into Slot Zero (0) of compatible 1746 modular chassis racks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCommunication Cabling:\u003c\/strong\u003e Connect RS-232 programming cables or Data Highway Plus (DH+) multi-drop network lines to respective ports.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower \u0026amp; Battery Check:\u003c\/strong\u003e Ensure system power supply is seated on the far left and verify backup battery (1747-BA) connection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Speed Execution:\u003c\/strong\u003e 0.37 ms bit execution and fast scan times maintain strict loop control in automated tasks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobust Environmental Tolerance:\u003c\/strong\u003e Operates reliably from 0°C to 60°C with 5% to 95% non-condensing humidity endurance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Networking:\u003c\/strong\u003e Built-in DH+ protocol enables high-speed data exchange with PLC-5 and other Allen-Bradley systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical FAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: What is the total user memory capacity of the Allen-Bradley 1747-L542?\u003c\/strong\u003e\u003cbr\u003e\nA1: The processor provides 32 KB (32,000 words) of user memory, partitioned into data and program storage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ2: Which communication interfaces are integrated into this SLC 5\/04 processor?\u003c\/strong\u003e\u003cbr\u003e\nA2: It features built-in Data Highway Plus (DH+) and RS-232 communication ports.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ3: What chassis slot must the 1747-L542 processor be installed in?\u003c\/strong\u003e\u003cbr\u003e\nA3: The controller must be installed directly into Slot Zero (0) of the local modular I\/O chassis.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67852677644420,"sku":"1747-L542","price":174.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/7454\/7844\/files\/1747-L542-1.jpg?v=1793020393","url":"https:\/\/www.etowonauto.com\/uz\/products\/allen-bradley-1747-l542-slc-5-04-32kb-modular-cpu-processor-unit","provider":"Etowon Auto","version":"1.0","type":"link"}