{"product_id":"allen-bradley-1745-lp104-slc-100-controller-unit","title":"Allen-Bradley 1745-LP104 SLC 100 Controller Unit","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1745-LP104\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1745-LP104\u003c\/strong\u003e Programmable Controller Processor Unit, operates as a dedicated hardware component for direct CPU 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-LP104\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\u003e3.20 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\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e18-30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Capacity\u003c\/td\u003e\n\u003ctd\u003e10 Digital Input Channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e24 VAC\/DC (10-30 VAC\/DC Range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Capacity\u003c\/td\u003e\n\u003ctd\u003e6 Relay Contact Digital Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage Rating\u003c\/td\u003e\n\u003ctd\u003e10-250 VAC (50\/60 Hz) \/ 10-125 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpansion Capacity\u003c\/td\u003e\n\u003ctd\u003eSLC 100\/150 Expansion Modules\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; Bus Execution\u003c\/strong\u003e: The 1745-LP104 integrates directly with downstream SLC 100\/150 expansion modules over a parallel expansion ribbon cable, updating CPU scan memory tables across 16 local and extended I\/O channels without network protocol latencies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirmware Flash Compatibility \u0026amp; Addressing\u003c\/strong\u003e: Internal memory register maps assign discrete input and output points directly to the processor memory table, maintaining rigid deterministic cycle execution across all system points.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGalvanic Isolation \u0026amp; Field Protection\u003c\/strong\u003e: Optoisolated 24 VAC\/DC digital inputs and isolated hard contact relay outputs isolate internal CPU logic gates from field ground loops and voltage transients.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can expansion modules be plugged into or removed from the 1745-LP104 controller while under power?\u003c\/p\u003e\n\u003cp\u003eA: No. Hot-swapping is strictly prohibited. Operating 18-30 VDC supply power must be de-energized prior to connecting or disconnecting the expansion bus ribbon cable to prevent damage to backplane driver circuits.\u003c\/p\u003e\n\u003cp\u003eQ: What power source is required to operate the primary 1745-LP104 controller logic?\u003c\/p\u003e\n\u003cp\u003eA: The main unit requires an external 18-30 VDC power supply connected directly to the dedicated supply input terminals.\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: Mount the unit securely on an enclosure backpanel using standard mounting hardware. Maintain a minimum vertical clearance of 50 mm (2 inches) above and below the chassis to facilitate natural thermal convection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupply Power \u0026amp; Field Terminal Wiring\u003c\/strong\u003e: Route 18-30 VDC power and I\/O field cabling through separate wireways. Secure all conductors into screw terminal connections following standard industrial torque limits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding \u0026amp; Noise Mitigation\u003c\/strong\u003e: Connect a dedicated low-impedance copper jumper from the unit chassis ground stud directly to the central cabinet earth ground bar. Separate low-voltage input conductors from high-voltage AC output 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":45340470182003,"sku":"1745-LP104","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_09-17-16_ee4ec915-23c7-4d0f-b9dc-4f94a19501fa.png?v=1786411614","url":"https:\/\/www.dcssupplier.com\/ar\/products\/allen-bradley-1745-lp104-slc-100-controller-unit","provider":"DcsSupplier Limited","version":"1.0","type":"link"}