{"product_id":"allen-bradley-1747-l542-slc-500-memory-controller","title":"Allen-Bradley 1747-L542 SLC 500 Memory Controller","description":"\u003cdiv\u003e\u003cp\u003eAllen-Bradley 1747-L542 SLC 500 Memory Controller is a SLC 5\/04 CPU processor for the SLC 500 modular PLC family. It provides 32K of total memory for user programs and data and includes two on-board communications ports: RS-232 serial for direct programming and data transfer and a DH+ (Data Highway Plus) port for networked device communication. This controller is used to execute control logic and manage I\/O in legacy automation lines, typically interfacing with standard SLC 500 I\/O modules and DH+ networks or serial peripherals. It operates with the SLC 500 instruction set and software tools historically used with RSLogix 500, supporting applications that require reliable serial and DH+ connectivity. Common applications include machine and process control on older manufacturing lines, batch operations, and data collection on systems where upgrading to modern PLCs is not feasible. The 1747-L542’s 32K memory capacity supports moderate-sized programs and data tables within the SLC 500 architecture, making it a practical option for maintaining legacy installations that rely on RS-232 and DH+ communication.\u003c\/p\u003e\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"New","offer_id":51659702239534,"sku":null,"price":851.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_7712fa33-2cf8-41a6-865b-39a76b9318f5.jpg?v=1769529752","url":"https:\/\/plgautomation.com\/products\/allen-bradley-1747-l542-slc-500-memory-controller","provider":"PLG Automation ","version":"1.0","type":"link"}