{"product_id":"allen-bradley-1747-l40b-slc-500-fixed-controller-processor","title":"Allen-Bradley 1747-L40B SLC 500 Fixed Controller Processor","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley 1747-L40B is a fixed controller processor belonging to the widely deployed SLC 500 automation platform. This self-contained unit integrates the processor, power supply, and a fixed configuration of discrete inputs and outputs into a single, compact housing designed for space-constrained industrial control environments. Engineered for reliable discrete automation, the controller features robust built-in I\/O capabilities and reliable processing speeds suited for small-to-medium manufacturing and machinery applications.\u003c\/p\u003e\n\u003cp\u003eMemory management on the 1747-L40B includes capacitor-backed RAM with options for external memory backup via EEPROM or UVPROM chips to protect user programs against data loss. The integrated power supply accepts standard AC line power and supplies regulated voltage internally while minimizing the impact of electrical noise and line transients commonly found in heavy industrial settings.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eIntegrated SLC 500 fixed controller architecture combining processor, power supply, and I\/O in one unit\u003c\/li\u003e\n  \u003cli\u003e24 built-in 120VAC discrete inputs for reliable sensor and switch monitoring\u003c\/li\u003e\n  \u003cli\u003e16 built-in AC Triac outputs for direct control of high-voltage loads\u003c\/li\u003e\n  \u003cli\u003eCapacitor-backed RAM with optional EEPROM or UVPROM memory backup support\u003c\/li\u003e\n  \u003cli\u003eBuilt-in communication port for programming, operator interface connection, or DH-485 networking\u003c\/li\u003e\n  \u003cli\u003eDesigned for DIN rail or panel mounting with robust noise-immunity features\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eStandalone packaging and material handling machinery\u003c\/li\u003e\n  \u003cli\u003eSmall conveyor systems and sorting equipment\u003c\/li\u003e\n  \u003cli\u003eHVAC equipment control panels\u003c\/li\u003e\n  \u003cli\u003ePumping stations and local water treatment skids\u003c\/li\u003e\n  \u003cli\u003eRetrofitting legacy relay logic panels with reliable solid-state control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eParameter\u003c\/th\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eManufacturer\u003c\/td\u003e\n      \u003ctd\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Line\u003c\/td\u003e\n      \u003ctd\u003eSLC 500\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCatalog Number \/ Exact Model\u003c\/td\u003e\n      \u003ctd\u003e1747-L40B\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eController Type\u003c\/td\u003e\n      \u003ctd\u003eFixed I\/O Controller Processor\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eLine Power Voltage\u003c\/td\u003e\n      \u003ctd\u003e120\/240 VAC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eInput Channels\u003c\/td\u003e\n      \u003ctd\u003e24 points, 120 VAC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOutput Channels\u003c\/td\u003e\n      \u003ctd\u003e16 points, AC Triac\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTypical Execution Time\u003c\/td\u003e\n      \u003ctd\u003e8 ms per 1K instructions\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePower Dissipation\u003c\/td\u003e\n      \u003ctd\u003e13 W to 27 W range (0.27 W per point typical)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eInrush Current\u003c\/td\u003e\n      \u003ctd\u003e30 A max. power supply inrush rating\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eIsolation\u003c\/td\u003e\n      \u003ctd\u003e1,500 V\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCommunication Port\u003c\/td\u003e\n      \u003ctd\u003eDH-485 \/ RS-232 channel\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCountry of Origin\u003c\/td\u003e\n      \u003ctd\u003eUnited States\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eConnections \/ Interfaces\u003c\/h3\u003e\n\u003cp\u003eThe 1747-L40B provides clearly marked terminal blocks along the top and bottom faces for direct wiring of 120VAC field inputs and AC Triac outputs. A standard communication port on the front panel allows connection to programming terminals running RSLogix 500 software or industrial operator interfaces via the DH-485 protocol.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the controller on a standard DIN rail or secure directly to a grounded subpanel within an appropriate enclosure to protect against dust, moisture, and ambient temperature extremes. Ensure adequate clearance around the unit for natural convection cooling. Verify all AC power and I\/O field wiring connections against the terminal identification markings before applying line power.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":53770306781547,"sku":"1747-L40B","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/1747-L40B_1200x1200_217b9e15-5bdc-47f7-8d51-1f571a511d65.jpg?v=1787740869","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1747-l40b-slc-500-fixed-controller-processor","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}