{"product_id":"allen-bradley-1785-l46b-plc-5-46-processor-memory-controller","title":"Allen-Bradley 1785-L46B PLC-5\/46 Processor - Memory Controller","description":"\u003ch2\u003eAllen-Bradley 1785-L46B PLC-5\/46 Enhanced Programmable Controller\u003c\/h2\u003e\n\u003ch3\u003eCore System Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e74b5;\"\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Rockwell Automation \/ Allen-Bradley\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e74b5;\"\u003e\u003cstrong\u003eModel Number:\u003c\/strong\u003e 1785-L46B\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e74b5;\"\u003e\u003cstrong\u003eProcessor Type:\u003c\/strong\u003e PLC-5\/46 Enhanced with Protected Memory\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e74b5;\"\u003e\u003cstrong\u003eUser Memory:\u003c\/strong\u003e 48K Words Protected Capacity\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e74b5;\"\u003e\u003cstrong\u003eI\/O Capacity:\u003c\/strong\u003e 2048 Total or 2048 Input + 2048 Output\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e74b5;\"\u003e\u003cstrong\u003eAnalog I\/O:\u003c\/strong\u003e 2048 Channels Maximum\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e74b5;\"\u003e\u003cstrong\u003eBackplane Current:\u003c\/strong\u003e 3.0A @ 5V DC\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #2e74b5;\"\u003e\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e 17.3 Watts Maximum\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdvanced Communication Capabilities\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: #e74c3c;\"\u003eFour DH+\/Remote I\/O Ports (Adapter or Scanner Mode)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #e74c3c;\"\u003eSerial Communication Port: RS-232\/422\/423 Compatible\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #e74c3c;\"\u003e9-pin D-shell Connector for DF1 Protocol Support\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #e74c3c;\"\u003eElectrical Isolation: 500V-1000V Between Communication Ports\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #e74c3c;\"\u003eAll Ports Support Simultaneous Multi-Protocol Operation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: #e74c3c;\"\u003eReal-time Network Diagnostics and Status Monitoring\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePerformance \u0026amp; System Architecture\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMaximum I\/O Chassis: 61 Total (60 Universal Remote)\u003c\/li\u003e\n\u003cli\u003eProgram Scan Time: 0.5 ms per K Word for Bit Logic Operations\u003c\/li\u003e\n\u003cli\u003eI\/O Scan Times: 3ms at 230.4 kbps, 7ms at 115.2 kbps, 10ms at 57.6 kbps\u003c\/li\u003e\n\u003cli\u003eMemory Protection: Integrated Security for Program and Data\u003c\/li\u003e\n\u003cli\u003eHardware Addressing: 2-slot, 1-slot, and 1\/2-slot Modes\u003c\/li\u003e\n\u003cli\u003eControl Coprocessor: Expansion Port for Enhanced Functions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEnvironmental \u0026amp; Operational Ratings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Temperature: 0°C to 60°C (32°F to 140°F)\u003c\/li\u003e\n\u003cli\u003eStorage Temperature: -40°C to 85°C (-40°F to 185°F)\u003c\/li\u003e\n\u003cli\u003eRelative Humidity: 5% to 95% Non-Condensing\u003c\/li\u003e\n\u003cli\u003eReal-time Clock Accuracy: ±5 Minutes per Month\u003c\/li\u003e\n\u003cli\u003eShock Resistance: 30G Operational, 50G Non-Operational\u003c\/li\u003e\n\u003cli\u003eVibration Tolerance: 1G @ 10-500 Hz Frequency Range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation \u0026amp; Configuration\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the \u003cstrong\u003e1785-L46B\u003c\/strong\u003e in left-most slot of 1771-A1B, A2B, A3B, A3B1, A4B chassis\u003c\/li\u003e\n\u003cli\u003eConfigure memory protection settings for secure program operation\u003c\/li\u003e\n\u003cli\u003eSet hardware addressing mode based on I\/O module density requirements\u003c\/li\u003e\n\u003cli\u003eUtilize battery-backed memory modules for critical data retention\u003c\/li\u003e\n\u003cli\u003eImplement proper grounding and electrical isolation for communication ports\u003c\/li\u003e\n\u003cli\u003eMonitor thermal dissipation and ensure adequate chassis ventilation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility \u0026amp; Expansion\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eI\/O System Compatibility: 1771, 1794, 1746, and 1791 I\/O Families\u003c\/li\u003e\n\u003cli\u003eModule Support: 8-point, 16-point, 32-point, and Intelligent I\/O Modules\u003c\/li\u003e\n\u003cli\u003eMemory Expansion: 1785-ME32, ME64, M100 Battery-Backed Modules\u003c\/li\u003e\n\u003cli\u003eBattery System: 1770-XYC with Advanced Power Management\u003c\/li\u003e\n\u003cli\u003eControl Network: DH+ and Remote I\/O for Distributed Control Systems\u003c\/li\u003e\n\u003cli\u003eCertifications: UL, CSA, C-TICK, CE Industrial Standards Compliance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackaging \u0026amp; Shipping Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYour order includes one genuine Allen-Bradley \u003cstrong\u003e1785-L46B\u003c\/strong\u003e processor unit\u003c\/li\u003e\n\u003cli\u003eWe include comprehensive installation guides and programming documentation\u003c\/li\u003e\n\u003cli\u003eWe ship worldwide via express carriers including FedEx, UPS, and DHL\u003c\/li\u003e\n\u003cli\u003eYou receive complete tracking information and delivery status updates\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhat does \"protected memory\" mean for this controller?\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eProtected memory limits access to critical program data and configuration, preventing unauthorized changes to control logic.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eHow many remote I\/O chassis can connect to each communication link?\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eEach Remote I\/O link supports up to 32 chassis, with the controller managing 60 total remote chassis.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWhat is the advantage of the multiple hardware addressing modes?\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eDifferent addressing modes optimize I\/O configuration for various module densities and system requirements.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCan this controller communicate with different I\/O families simultaneously?\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eYes, it supports 1771, 1794, 1746, and 1791 I\/O systems in the same control architecture.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWhat is the purpose of the electrical isolation between communication ports?\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eIsolation prevents ground loops and electrical noise interference, ensuring reliable network communication.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e© 2025 Ubest Automation Limited. All rights reserved. Original Source: \u003ca href=\"https:\/\/www.ubestplc.com\/\"\u003ehttps:\/\/www.ubestplc.com\/\u003c\/a\u003e Contact: \u003ca href=\"mailto:sales@ubestplc.com\"\u003esales@ubestplc.com\u003c\/a\u003e Phone: \u003ca href=\"https:\/\/wa.me\/868618030005825\"\u003e+86 86 180 3000 5825\u003c\/a\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":51195160166682,"sku":null,"price":159.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/6240\/4634\/files\/1785-L46B_AB.jpg?v=1760335424","url":"https:\/\/www.ubestplc.com\/fa\/products\/allen-bradley-1785-l46b-plc-5-46-processor-memory-controller","provider":"Ubest Automation Limited","version":"1.0","type":"link"}