{"product_id":"allen-bradley-1785-l40c-controlnet-processor-module-for-plc-5-40","title":"Allen-Bradley 1785-L40C ControlNet Processor Module for PLC-5\/40","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1785-L40C is a ControlNet processor module designed for the PLC-5 family of control systems. It provides a robust platform for controlling field devices through the 1771 I\/O chassis, offering 48K words of battery-backed SRAM and a maximum I\/O capacity of 2048 points (any mix) or 2048 inputs plus 2048 outputs in a complementary setup. This module is engineered for reliability and performance in demanding industrial environments.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eKey specifications for the 1785-L40C include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Type:\u003c\/strong\u003e ControlNet Processor Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcessor:\u003c\/strong\u003e PLC-5\/40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax User Memory Words:\u003c\/strong\u003e 48 Kilowords\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery-Backed Static RAM:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEEPROM Program Backup (using 1785-ME16, -ME32, -ME64, -M100):\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtected Memory:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Total I\/O:\u003c\/strong\u003e 2048 (any mix) or 2048 in + 2048 out (complementary)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Analog I\/O:\u003c\/strong\u003e 2048\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI\/O Scan Time Per Rack:\u003c\/strong\u003e 10 ms at 57.6 kbits\/s, 7 ms at 115.2 kbits\/s, 3 ms at 230.4 mbits\/s\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax I\/O Chassis Total:\u003c\/strong\u003e 61\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax I\/O Chassis Extended Local:\u003c\/strong\u003e 0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax I\/O Chassis Universal Remote:\u003c\/strong\u003e 32 per I\/O link\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRS-232-C\/422-A\/423-A Ports:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Coprocessor Expansion Port:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 10612598139337\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\u003cp\u003eThe 1785-L40C delivers several operational advantages:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eControlNet network capability for high-speed, deterministic control\u003c\/li\u003e\n\u003cli\u003eLarge memory capacity for complex programs and data logging\u003c\/li\u003e\n\u003cli\u003eFlexible I\/O configuration supports a wide range of field devices\u003c\/li\u003e\n\u003cli\u003eBattery-backed SRAM preserves program and data during power loss\u003c\/li\u003e\n\u003cli\u003eSupports hot backup via 1785-CHBM cartridge for system redundancy\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThis processor is well-suited for applications requiring reliable, real-time control. Typical uses include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eManufacturing assembly lines where precise sequencing and timing are critical\u003c\/li\u003e\n\u003cli\u003eProcess control systems managing analog and discrete I\/O across remote racks\u003c\/li\u003e\n\u003cli\u003eMaterial handling systems that demand coordinated motion and interlocks\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIn each scenario, the 1785-L40C provides the processing power and communication flexibility needed to maintain high throughput and minimize downtime.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eWhen installing the 1785-L40C, ensure the module is seated firmly in the 1771 I\/O chassis. Connect the ControlNet network cable to the RJ45 port and verify network termination. For programming, use the 8-pin mini-DIN connector with the appropriate programming cable. Configure the processor's memory and I\/O mapping using the PLC-5 programming software before commissioning.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eRegular inspection of the battery status is essential to maintain program retention. Check the battery voltage annually and replace it proactively to avoid memory loss. Keep the module free from dust and moisture, and ensure ambient temperature stays within 0-60°C (32-140°F) to prevent overheating. The module's robust design withstands 30G shock and 1G vibration, ensuring long service life in harsh environments.\u003c\/p\u003e\u003ch2\u003eCompatibility \u0026amp; Integration\u003c\/h2\u003e\u003cp\u003eThe 1785-L40C integrates seamlessly with 1771, 1794, 1746, and 1791 I\/O modules, including 8-, 16-, and 32-point digital and intelligent modules. It supports ControlNet communication with a transmission rate of 5 Mbps and user-selectable network update times from 2-100 ms. The built-in RS-232\/422\/423 serial port enables connectivity to programming terminals and other serial devices.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing, verify that the 1785-L40C meets your system's memory and I\/O requirements. Confirm compatibility with your existing chassis and power supply. If you need hot backup capability, ensure the 1785-CHBM cartridge is available. For genuine, tested automation parts, PLC Source PRO offers reliable sourcing and fast delivery to keep your operations running.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44436148551779,"sku":"1785-L40C","price":246.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1785-BCM_83ffd434-332f-4289-b9b1-c5d0719367e8.jpg?v=1785793730","url":"https:\/\/www.plcsourcepro.com\/he\/products\/allen-bradley-1785-l40c-controlnet-processor-module-for-plc-5-40","provider":"PLC Source PRO","version":"1.0","type":"link"}