{"product_id":"logix5550-512kb-controller-1756-l1m1-allen-bradley","title":"Logix5550 512KB Controller 1756-L1M1 Allen Bradley","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley 1756-L1M1 is a ControlLogix 5550 controller with integrated 512 KB expansion memory. It provides 500 KB of data and logic memory plus 150 KB of I\/O memory for control applications, representing the original generation of ControlLogix processors.\u003c\/p\u003e\n\u003ch3\u003eKey Specs\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eData and logic memory:\u003c\/strong\u003e 500 KB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI\/O memory:\u003c\/strong\u003e 150 KB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpansion memory:\u003c\/strong\u003e 512 KB integrated (M1)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-volatile memory:\u003c\/strong\u003e None (requires battery backup)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane current:\u003c\/strong\u003e 950 mA @ 5.1 V DC, 20 mA @ 24 V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower dissipation:\u003c\/strong\u003e 4.6 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.35 kg (12.5 oz)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgramming cable:\u003c\/strong\u003e 1756-CP3 or 1747-CP3 serial cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose This\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProven reliability in legacy ControlLogix installations\u003c\/li\u003e\n\u003cli\u003eIntegrated expansion memory eliminates separate memory board installation\u003c\/li\u003e\n\u003cli\u003eCompatible with original 1756 I\/O and communication modules\u003c\/li\u003e\n\u003cli\u003eBattery-backed memory retains program during power loss\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat battery does the 1756-L1M1 use?\u003c\/strong\u003e The 1756-BA1 lithium battery (0.59 g) is the compatible replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhich software programs this controller?\u003c\/strong\u003e RSLogix 5000 version compatible with ControlLogix 5550 controllers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs it still supported?\u003c\/strong\u003e The 1756-L1M1 is a legacy controller available through surplus channels for maintaining existing installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMounting Steps\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eInstall the controller in any available slot of the 1756 chassis.\u003c\/li\u003e\n\u003cli\u003eConnect the 1756-CP3 serial cable to the programming port.\u003c\/li\u003e\n\u003cli\u003eInstall a fresh 1756-BA1 battery before commissioning.\u003c\/li\u003e\n\u003cli\u003eConfigure the controller in RSLogix 5000 and download the application.\u003c\/li\u003e\n\u003cli\u003eVerify the controller status indicators show normal operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eBuying Advice\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSelect the 1756-L1M1 for maintaining or expanding legacy ControlLogix 5550 systems.\u003c\/li\u003e\n\u003cli\u003eFor new installations, consider the 1756-L71 or later ControlLogix 5570 series controllers.\u003c\/li\u003e\n\u003cli\u003eStock spare 1756-BA1 batteries as part of routine maintenance for this controller.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":50207635079306,"sku":"1756-L1M1","price":128.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0698\/2818\/2154\/files\/1756-L1M1_2_34ba7917-f214-49c6-baad-3a6fd6cd5494.jpg?v=1789545184","url":"https:\/\/www.cambiaplc.com\/products\/logix5550-512kb-controller-1756-l1m1-allen-bradley","provider":"Controlix Automation","version":"1.0","type":"link"}