{"product_id":"1785-l40e-industrial-automation-module-by-allen-bradley","title":"1785-L40E Industrial Automation Module by Allen-Bradley","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1785-L40E is a high-performance Programmable Logic Controller (PLC) from the trusted PLC-5 family. Designed for medium to large-scale automation applications, this industrial automation module interfaces simultaneously with a wide range of devices, making it a versatile backbone for machine and process control systems. With 48K words of user memory and support for up to 2048 I\/O points, the 1785-L40E delivers robust processing power for demanding industrial environments.\u003c\/p\u003e\u003cp\u003eInstalled in a 1771 chassis, the 1785-L40E utilizes the electronic backplane for power distribution and communication with other modules. It supports multiple chassis configurations, including local and remote I\/O, ensuring flexible system scaling. Whether upgrading an existing line or building a new control system, the 1785-L40E offers proven reliability and performance.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cp\u003eThe following specifications are directly from the manufacturer's data and define the operational capabilities of the 1785-L40E.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1785-L40E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eProgrammable Logic Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003ePLC-5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcessor\u003c\/td\u003e\n\u003ctd\u003ePLC-5\/40E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax User Memory Words\u003c\/td\u003e\n\u003ctd\u003e48 Kilowords\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery-Backed Static RAM\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEEPROM Program Backup Option\u003c\/td\u003e\n\u003ctd\u003eYes (using 1785-ME16, -ME32, -ME64, -M100)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Total I\/O\u003c\/td\u003e\n\u003ctd\u003e2048 (any mix) or 2048 in + 2048 out (complementary)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Analog I\/O\u003c\/td\u003e\n\u003ctd\u003e2048\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Number of I\/O per Link\u003c\/td\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Scan Time Per Rack\u003c\/td\u003e\n\u003ctd\u003e10 ms at 57.6 kbits\/s, 7 ms at 115.2 kbits\/s, 3 ms at 230.4 mbits\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax I\/O Chassis Total\u003c\/td\u003e\n\u003ctd\u003e61\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax I\/O Chassis Universal Remote\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax I\/O Chassis Extended Local\u003c\/td\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmbedded Communication Interfaces\u003c\/td\u003e\n\u003ctd\u003e4 DH+\/Remote I\/O (Adapter or Scanner), 1 serial port (RS-232\/423\/422A), 1 Ethernet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Load\u003c\/td\u003e\n\u003ctd\u003e3.3A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e17.3W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e1771-P4S, -P6S, -P4S1, -P6S1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0...60 °C (32...140 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNon-Operating Temperature\u003c\/td\u003e\n\u003ctd\u003e–40...85 °C (–40...185 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e1770-XYC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApproximately 1.38 kg (3.0 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Memory Capacity:\u003c\/strong\u003e 48K words of user memory accommodates complex programs and data logging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible I\/O Configuration:\u003c\/strong\u003e Supports 2048 any mix or complementary I\/O (2048 in + 2048 out), adapting to diverse application needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Protocol Communication:\u003c\/strong\u003e Embedded DH+, Remote I\/O, serial (RS-232\/423\/422A), and Ethernet ports enable seamless integration with various networks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRugged Design:\u003c\/strong\u003e Operates reliably in temperatures from 0 to 60 °C, suitable for harsh industrial settings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Back-up:\u003c\/strong\u003e Includes 1770-XYC battery for memory retention during power loss.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe 1785-L40E is ideal for applications that require robust control and flexibility. Typical use cases include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing Assembly Lines:\u003c\/strong\u003e Coordinating multiple stations with discrete and analog I\/O, using the 1785-L40E's fast scan times to maintain throughput.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Handling Systems:\u003c\/strong\u003e Managing conveyors, sorters, and robotic interfaces via DH+ and Remote I\/O networks for real-time control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess Control:\u003c\/strong\u003e Implementing PID algorithms for temperature, pressure, or flow control in chemical or food processing plants.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIts ability to handle up to 61 chassis and 2048 I\/O points makes it a scalable solution for expanding operations.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup\u003c\/h2\u003e\u003cp\u003eProper installation ensures optimal performance and longevity. Follow these guidelines:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMount the 1785-L40E in a compatible 1771 chassis (e.g., 1771-A1B, -A2B, -A3B, -A3B1, -A4B).\u003c\/li\u003e\n\u003cli\u003eUse a compatible power supply (1771-P4S, -P6S, -P4S1, -P6S1) to provide the required backplane current (3.3A).\u003c\/li\u003e\n\u003cli\u003eConnect communication cables to the appropriate ports: DH+\/RIO, serial, and Ethernet.\u003c\/li\u003e\n\u003cli\u003eConfigure the processor using RSLogix 5 or equivalent software, selecting the appropriate I\/O addressing mode (2-slot, 1-slot, or half-slot).\u003c\/li\u003e\n\u003cli\u003eEnsure proper grounding and shielding for communication cables to minimize electromagnetic interference.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eRoutine maintenance helps maximize the lifespan of the 1785-L40E. Key practices include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCheck the 1770-XYC battery annually and replace it every 3-5 years to prevent memory loss.\u003c\/li\u003e\n\u003cli\u003eKeep the enclosure clean and free of dust; ensure adequate airflow to maintain operating temperature.\u003c\/li\u003e\n\u003cli\u003eInspect connectors and wiring for signs of wear or corrosion.\u003c\/li\u003e\n\u003cli\u003ePerform periodic backups of the program to EEPROM modules (1785-ME16, -ME32, -ME64, -M100) to safeguard against unexpected failures.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFollowing these steps reduces downtime and extends service life, delivering long-term cost savings.\u003c\/p\u003e\u003ch2\u003eCompatibility \u0026amp; Integration\u003c\/h2\u003e\u003cp\u003eThe 1785-L40E integrates seamlessly with other Allen-Bradley controllers and devices. It supports:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDH+ Networks:\u003c\/strong\u003e Communicate with other PLC-5 processors and HMIs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote I\/O:\u003c\/strong\u003e Connect to 1771 I\/O chassis and intelligent I\/O modules (8-, 16-, 32-point).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEthernet:\u003c\/strong\u003e Enable TCP\/IP communication for programming and data exchange.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial:\u003c\/strong\u003e Interface with legacy devices using RS-232, RS-423, or RS-422A standards.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis multi-protocol capability ensures easy integration into existing automation architectures.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing a 1785-L40E, verify your system requirements:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConfirm memory and I\/O needs—this module suits applications requiring up to 48K words and 2048 I\/O.\u003c\/li\u003e\n\u003cli\u003eCheck chassis compatibility and available slots.\u003c\/li\u003e\n\u003cli\u003eReview communication requirements to ensure DH+, RIO, serial, and Ethernet ports meet your needs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor genuine Allen-Bradley 1785-L40E modules with reliable support, consider PLC Source PRO as a trusted supplier. We offer quality industrial automation parts backed by industry expertise.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44436154941539,"sku":"1785-L40E","price":218.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1785-BCM_95422e90-0d51-4386-9bd6-7c23884a6ac6.jpg?v=1785793942","url":"https:\/\/www.plcsourcepro.com\/he\/products\/1785-l40e-industrial-automation-module-by-allen-bradley","provider":"PLC Source PRO","version":"1.0","type":"link"}