{"product_id":"allen-bradley-1785-l40c15-controlnet-plc-5-40-processor-module","title":"Allen-Bradley 1785-L40C15 ControlNet PLC-5\/40 Processor Module","description":"\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1785-L40C15\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1785-L40C15\u003c\/strong\u003e ControlNet PLC-5\/40 Processor Module, operates as a dedicated hardware component for centralized program execution and real-time network scheduled communication within Allen-Bradley 1771 Universal I\/O chassis 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\u003e1785-L40C15\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\u003e3.00 lbs (1.36 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 1771 Single-Slot Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C (32 to 140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e15 W max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e5 VDC (Backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Draw\u003c\/td\u003e\n\u003ctd\u003e3.0 A @ 5 VDC max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcessor Type\u003c\/td\u003e\n\u003ctd\u003ePLC-5\/40 ControlNet (1.25 Phase)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Memory\u003c\/td\u003e\n\u003ctd\u003e48k Words SRAM (Battery-Backed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Interface\u003c\/td\u003e\n\u003ctd\u003eControlNet Phase 1.25 Communication Interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e1771 Universal I\/O Chassis Slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eControlNet Deterministic Network \u0026amp; Backplane Integration\u003c\/h3\u003e\n\u003cp\u003eThe 1785-L40C15 integrates direct ControlNet Phase 1.25 connectivity to deliver deterministic, time-critical data transmission across peer processors and distributed I\/O drops without relying on external bridge modules. Executing user programs from its internal 48k word SRAM, the unit communicates across the 1771 backplane bus to scan local digital and analog I\/O cards while coordinating scheduled ControlNet network updates. The onboard hardware maintains deterministic scan times and link repeatability across noisy industrial environments, drawing 3.0 A at 5 VDC directly from the chassis power supply.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the backplane current consumption for the 1785-L40C15 module?\u003c\/p\u003e\n\u003cp\u003eA: The 1785-L40C15 processor draws a maximum of 3.0 A at 5 VDC from the 1771 backplane power supply, which must be accounted for in total chassis power system calculations.\u003c\/p\u003e\n\u003cp\u003eQ: How is user program memory retained in the event of external power loss?\u003c\/p\u003e\n\u003cp\u003eA: System logic routines and data tables in the 48k word SRAM are preserved during power cycles by an internal lithium battery, preventing memory loss and maintaining system configuration state.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Isolation\u003c\/strong\u003e: Turn off main AC power to the 1771 chassis power supply before inserting or removing the 1785-L40C15 processor to prevent backplane bus edge-connector pin damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Insertion\u003c\/strong\u003e: Align the module card edges with the top and bottom guides of the leftmost slot (Slot 0) in the 1771 Universal I\/O chassis. Push firmly until the backplane connectors seat completely, then lock the chassis retaining latch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControlNet Coaxial Cabling\u003c\/strong\u003e: Connect ControlNet RG-6 quad-shield coaxial cable taps to the BNC ports. Ensure minimum cable bend radiuses are respected and maintain proper tap isolation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Grounding\u003c\/strong\u003e: Connect coaxial network cable shields to the main single-point plant ground system to eliminate ground loops and reduce EMI noise interference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Verification\u003c\/strong\u003e: Check the status of the backup memory battery before commissioning to ensure program data persistence during scheduled maintenance power outages.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48770297168062,"sku":"1785-L40C15","price":95.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1785-LT2_2_c007528f-2069-4b38-94c3-d87f3ca20843.png?v=1787296755","url":"https:\/\/www.autooiltech.com\/products\/allen-bradley-1785-l40c15-controlnet-plc-5-40-processor-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}