{"product_id":"allen-bradley-1747-l542-slc-500-dh-rs232-processor","title":"Allen-Bradley 1747-L542 SLC 500 DH RS232 Processor","description":"\u003cdiv\u003e\u003cp\u003eThe Allen-Bradley 1747-L542 is a SLC 5\/04 CPU for the SLC 500 family, delivering 32K words of user memory (approximately 28K for program and 4K for data) and providing both Data Highway Plus (DH+) networking and an RS-232 serial port for programming and DF1\/ASCII communications. It supports up to 4,096 discrete inputs and 4,096 discrete outputs, making it capable of handling compact to mid-size control tasks, and it is commonly programmed with RSLogix 500. Powered from 5 to 24 VDC, this module combines DH+ connectivity with RS-232 to facilitate serial device communication and offline programming in legacy automation setups. Rockwell Automation discontinued the SLC 5\/04 32K Controller as of March 31, 2024, so the 1747-L542 is considered a legacy device, though it remains in use in installations that rely on DH+ networking and RS-232 connectivity for control and data exchange.\u003c\/p\u003e\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"New","offer_id":51659703058734,"sku":null,"price":770.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_03d3d1d0-8b6a-43a4-8079-cbdae9906fe9.jpg?v=1769529753","url":"https:\/\/plgautomation.com\/products\/allen-bradley-1747-l542-slc-500-dh-rs232-processor","provider":"PLG Automation ","version":"1.0","type":"link"}