{"product_id":"allen-bradley-1747-l40e-slc-500-fixed-40-i-o-controller","title":"Allen-Bradley 1747-L40E SLC 500 Fixed 40 I\/O Controller","description":"\u003cp\u003eThe Allen-Bradley \u003cstrong\u003e1747-L40E\u003c\/strong\u003e is a self-contained SLC 500 fixed hardware controller engineered for standalone automation applications requiring integrated I\/O and high-speed counting capabilities. Featuring an embedded 120\/240 VAC power supply, 1K instruction memory, and a 40-point discrete I\/O layout, the unit combines 24 VDC sinking inputs with 16 DC transistor sourcing outputs. Its integrated design eliminates the need for a separate backplane chassis while facilitating high-speed input tracking and DH-485 network connectivity.\u003c\/p\u003e\n\u003ch3\u003eEmbedded I\/O Architecture and High-Speed Counting\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e1747-L40E\u003c\/strong\u003e integrates 40 discrete I\/O channels within its compact housing. The input section consists of 24 24 VDC sinking input points compatible with sourcing field devices. The output section provides 16 DC transistor sourcing outputs operating over a 10-50 VDC range, designed for rapid electronic switching and solid-state DC loads. Additionally, an integrated high-speed counter channel allows direct interface with incremental encoders or pulse trains for precise motion and frequency tracking.\u003c\/p\u003e\n\u003ch3\u003ePower Supply and System Hardware\u003c\/h3\u003e\n\u003cp\u003eEquipped with an internal AC line power supply, the unit operates on a standard 120\/240 VAC line voltage. The controller combines CPU processing power, 1K word instruction memory, I\/O terminals, and a DH-485 communication port within a single panel-mounted enclosure. Optional EEPROM or UVPROM memory modules (such as the 1747-M11 or 1747-M13) can be installed for user program backup.\u003c\/p\u003e\n\u003ch3\u003eTechnical Parameters\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1747-L40E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley (Rockwell Automation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController Type\u003c\/td\u003e\n\u003ctd\u003eSLC 500 Fixed Hardware Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Embedded I\/O\u003c\/td\u003e\n\u003ctd\u003e40 points\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Points\u003c\/td\u003e\n\u003ctd\u003e24 points, 24 VDC Sinking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Points\u003c\/td\u003e\n\u003ctd\u003e16 points, DC Transistor Sourcing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e10-50 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecial Functions\u003c\/td\u003e\n\u003ctd\u003eIntegrated High-Speed Counter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProgram Memory\u003c\/td\u003e\n\u003ctd\u003e1K Words Instruction Capacity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eDH-485 Port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLine Operating Voltage\u003c\/td\u003e\n\u003ctd\u003e120\/240 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStatus Indicator\u003c\/td\u003e\n\u003ctd\u003eDiscontinued by Manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.37 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: What input signal configuration does the 1747-L40E controller require?A: The controller utilizes 24 VDC sinking inputs, which expect current to flow into the module terminals from sourcing sensors or switches.\u003c\/p\u003e\n\u003cp\u003eQ: How do the transistor sourcing outputs function on the 1747-L40E?A: The 16 transistor outputs supply positive DC voltage (sourcing) over a 10-50 VDC operating range to drive external DC field loads.\u003c\/p\u003e\n\u003cp\u003eQ: Does the 1747-L40E require a separate backplane chassis or power supply module?A: No, as a fixed hardware style unit, it houses its CPU, 1K memory, 120\/240 VAC power supply, and 40 I\/O terminals inside a single standalone assembly.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67156253048947,"sku":"1747-L40E","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/1747-L30L2_3ed528da-b4e4-44ac-9c2f-ee238a1e9b44.png?v=1794289215","url":"https:\/\/www.dcssupplier.com\/products\/allen-bradley-1747-l40e-slc-500-fixed-40-i-o-controller","provider":"DcsSupplier Limited","version":"1.0","type":"link"}