{"product_id":"allen-bradley-1745-lp103-controller-unit","title":"Allen Bradley 1745-LP103 Controller Unit","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1745-LP103\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1745-LP103\u003c\/strong\u003e Processor Unit, operates as a dedicated hardware component for integrated logic execution and discrete signal processing within SLC 100 platforms.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\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\u003e1745-LP103\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.23 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e10.0 x 6.5 x 4.0 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e15 VA maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Capacity\u003c\/td\u003e\n\u003ctd\u003e10 External AC Input Circuits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Rating\u003c\/td\u003e\n\u003ctd\u003e85-132 VAC \/ 170-265 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Capacity\u003c\/td\u003e\n\u003ctd\u003e6 External Hard Contact Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Capacity\u003c\/td\u003e\n\u003ctd\u003e885 Words Memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Platform\u003c\/td\u003e\n\u003ctd\u003eSLC 100 Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Interconnect \u0026amp; I\/O Density Scaling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeterminism \u0026amp; CPU Scan Execution\u003c\/strong\u003e: The internal central processor executes user ladder logic directly against 10 selectable AC input channels and 6 hard contact output circuits while updating local expansion chassis racks across the ribbon backplane bus without network latency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirmware Flash Compatibility \u0026amp; Address Mapping\u003c\/strong\u003e: Internal memory registers map input and output bit positions directly into the core processor image table, maintaining deterministic execution timing across expanded I\/O channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGalvanic Isolation \u0026amp; Field Noise Suppression\u003c\/strong\u003e: Optoisolated input stages and electromechanical output contacts isolate internal CPU logic gates from high-voltage field line surges and industrial electrical transients.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can expansion ribbon bus connections be inserted or removed while the 1745-LP103 unit is powered?\u003c\/p\u003e\n\u003cp\u003eA: No. Hot-swapping is prohibited. Master AC supply power to the processor chassis must be de-energized prior to connecting or disconnecting the expansion bus cable to avoid backplane component damage.\u003c\/p\u003e\n\u003cp\u003eQ: How is the memory address space structured for the 1745-LP103 user program?\u003c\/p\u003e\n\u003cp\u003eA: The onboard memory capacity consists of 885 words allocated for user ladder logic routines, internal control relays, counters, timers, and processor status flags.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhysical Mounting \u0026amp; Thermal Clearance\u003c\/strong\u003e: Securely mount the chassis vertically inside a metallic control enclosure using standard fasteners. Maintain a minimum vertical clearance of 50 mm (2 inches) above and below the housing to facilitate natural thermal convection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC Input Power \u0026amp; Signal Wiring\u003c\/strong\u003e: Route incoming 85-132 VAC or 170-265 VAC line voltage through dedicated conduits. Tighten screw terminal connections to standard industrial torque specifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding \u0026amp; Noise Mitigation\u003c\/strong\u003e: Attach a low-impedance copper ground wire directly from the chassis grounding lug to the central enclosure earth ground bus. Separate low-voltage input control lines from high-current motor drive wiring by at least 200 mm to suppress inductive noise coupling.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45340470083699,"sku":"1745-LP103","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-08-11_09-14-49_4f5a8bf1-ef50-4162-bb65-9e8235d1c528.png?v=1786411623","url":"https:\/\/www.dcssupplier.com\/ar\/products\/allen-bradley-1745-lp103-controller-unit","provider":"DcsSupplier Limited","version":"1.0","type":"link"}