{"product_id":"allen-bradley-1785-lt3-plc-5-12-processor-module","title":"Allen-Bradley 1785-LT3 PLC-5\/12 Processor Module","description":"\u003cp\u003eThe \u003cstrong\u003e1785-LT3\u003c\/strong\u003e is a PLC-5\/12 Processor Module engineered to direct sequential control, automated processing operations, and comprehensive factory-floor data handling. This slot-mounted hardware component installs into the left-most slot of a standard 1771 I\/O chassis, executing specialized ladder logic programs to manage complex system variables. Functioning as a standalone and adapter-capable device on industrial networks, the \u003cstrong\u003e1785-LT3\u003c\/strong\u003e coordinates multi-node signals and diagnostic data via built-in physical connection interfaces.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSeamless interlocking architecture designed exclusively for insertion into standard 1771 I\/O chassis frames\u003c\/li\u003e\n\u003cli\u003eIntegrated rear switch assembly (SW1) enabling direct manual assignment of the physical station address\u003c\/li\u003e\n\u003cli\u003eMultiple front-facing LED diagnostics providing continuous real-time verification of operational, communication, and battery conditions\u003c\/li\u003e\n\u003cli\u003eDedicated logic capabilities that execute bit-level instructions, advanced math functions, and automated runtime troubleshooting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSequential manufacturing control networks\u003c\/li\u003e\n\u003cli\u003eMachine-level diagnostic and execution systems\u003c\/li\u003e\n\u003cli\u003eDistributed data acquisition nodes\u003c\/li\u003e\n\u003cli\u003eDistributed control architecture utilizing peer-to-peer communication\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical 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\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCatalog Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1785-LT3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProcessor Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePLC-5\/12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Line\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eClassic PLC-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProcessor Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMemory Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 K words\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Local Racks Supported\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 (1 resident chassis)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Remote Racks Supported\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eI\/O Capacity (8-point modules)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e128 I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eI\/O Capacity (16-point modules)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e256 I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eI\/O Capacity (32-point modules)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e512 I\/O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProgram Scan Time (Bit Logic)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 ms\/K words\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProgram Scan Time (Typical)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 ms\/K words\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackplane Current Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication Modes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandalone, Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNetwork Interfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDH+ (Data Highway Plus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOptional Memory Modules\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8K EEPROM (1785-MJ)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1770-XY lithium battery (or 3.6V AA Tadiran TL-5104 AEL\/S)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHardware Addressing Support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2-slot, 1-slot, 1\/2-slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupported I\/O Modules\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBulletin 1771 I\/O (8, 16, 32-point, and intelligent modules)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Location Slot\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1771 I\/O chassis, left-most slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKeying Band Positions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBetween 40 and 42, Between 54 and 56\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTime of Day Clock (Max Variation at 60 degC)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlus or minus 3 min per month\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTime of Day Clock (Typical Variation at 20 degC)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlus or minus 20 s per month\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTiming Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOne program scan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTypical Discrete Local I\/O Scan\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 ms per local I\/O rack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1337 g (42.15 oz.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 to 60 degC (32 to 140 degF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40 to 85 degC (-40 to 185 degF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelative Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 to 95% (without condensation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating\/Non-operating Vibration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 g @ 10 to 500 Hz (0.012 inches peak-to-peak displacement)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Shock\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 g peak acceleration for 11 plus or minus 1 ms duration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNon-operating Shock\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 g peak acceleration for 11 plus or minus 1 ms duration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eConnections\/Interfaces\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eConnector Pin \/ Switch\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eFunction \/ Assignment\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSW1 Switch Assembly\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEstablishes the physical DH+ Station Address for Channel 1A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery Connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBuilt-in side connector mating to the 1770-XY battery pressure terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMemory Module Slot\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFront-accessible receiver accepting the optional 1785-MJ 8K EEPROM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCP Cable Connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMating port interfaces directly with the industrial programming terminal cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Positioning:\u003c\/strong\u003e Always install the processor module into the dedicated, left-most slot of the 1771 I\/O backplane chassis to ensure proper logic termination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeying Band Fitment:\u003c\/strong\u003e Position the hardware keying bands securely within the backplane rails between slots 40 and 42, and between slots 54 and 56 to verify correct module insertion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation Warning:\u003c\/strong\u003e Turn off all electrical supplies feeding the local I\/O chassis or memory socket before mounting the hardware or sliding an EEPROM into the slot to eliminate major diagnostic faults or data corruption.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround Infrastructure:\u003c\/strong\u003e Bond a dedicated grounding electrode conductor from the I\/O chassis enclosure wall star washer directly to the main plant earth ground bus to minimize industrial EMI.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompliance and Certifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCSA certified\u003c\/li\u003e\n\u003cli\u003eCSA Class I, Division 2, Groups A, B, C, D\u003c\/li\u003e\n\u003cli\u003eUL listed\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695183393131,"sku":"1785-LT3","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1785-lt3-prosessor-module-n5c00vzgkhh_8da67669-2f7b-4d01-8897-bb87d173c1ee.jpg?v=1766114375","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1785-lt3-plc-5-12-processor-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}