{"product_id":"allen-bradley-1785-l40e-ethernet-plc-5-programmable-controller","title":"Allen-Bradley 1785-L40E Ethernet PLC-5 Programmable Controller","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan\u003e1785-L40E\u003c\/span\u003e is a high-performance, single-slot \u003cspan\u003eEthernet PLC-5 Programmable Controller\u003c\/span\u003e designed for the Allen-Bradley 1771 Universal I\/O platform. It features an integrated Ethernet port (10 Mbps), enabling high-speed peer-to-peer communication, program uploads\/downloads, and data acquisition over standard office or industrial networks. With \u003cspan\u003e48k words of user memory\u003c\/span\u003e and the capacity to manage up to \u003cspan\u003e2048 I\/O points\u003c\/span\u003e, the 1785-L40E serves as a robust control solution for medium-to-large scale industrial applications that require seamless integration between the factory floor and enterprise-level Ethernet systems.\u003c\/p\u003e\n\u003ch3\u003eFunctional Communication \u0026amp; Logic\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan\u003e1785-L40E\u003c\/span\u003e simplifies network architecture by eliminating the need for external bridge modules. It features three high-speed communication channels: \u003cspan\u003eone dedicated Ethernet port\u003c\/span\u003e and \u003cspan\u003etwo configurable DH+\/Remote I\/O ports\u003c\/span\u003e. This allows the controller to simultaneously manage a local 1771 chassis, coordinate with remote I\/O racks, and communicate with HMIs or SCADA systems via EtherNet\/IP. Its powerful instruction set supports advanced floating-point math, PID control, and complex data handling, making it a \"workhorse\" for the automotive, food and beverage, and material handling industries.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"692\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003e\u003cspan\u003eAttribute\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eSpecification Details\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1785-L40E\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eUser Memory\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e48k Words\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eTotal I\/O (Max)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2048 (Any mix) or 4096 (Complementary)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCommunication Ports\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 Ethernet, 2 DH+ or Remote I\/O\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eMax Remote Chassis\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e60\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBackplane Current Load\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3.6 A @ 5V DC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003ePower Dissipation\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e18.9 W (Max)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0 °C to +60 °C (32 °F to +140 °F)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1.39 kg (3 lb, 1 oz)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eReplacement Battery\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1770-XYC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan class=\"mat-mdc-button-persistent-ripple mdc-button__ripple\"\u003e\u003c\/span\u003e\u003cspan class=\"mdc-button__label\"\u003e\u003cspan class=\"export-sheets-button\"\u003e\u003cspan class=\"export-sheets-icon\"\u003e\u003c\/span\u003e\u003cspan\u003e导出到 Google 表格\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"mat-focus-indicator\"\u003e\u003c\/span\u003e\u003cspan class=\"mat-mdc-button-touch-target\"\u003e\u003c\/span\u003e\u003cspan class=\"mat-mdc-button-persistent-ripple mdc-icon-button__ripple\"\u003e\u003c\/span\u003e\u003cspan class=\"mat-focus-indicator\"\u003e\u003c\/span\u003e\u003cspan class=\"mat-mdc-button-touch-target\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eHow does the Ethernet port improve system integration?\u003c\/span\u003eThe built-in Ethernet port supports the \u003cspan\u003eEtherNet\/IP\u003c\/span\u003e protocol, allowing the 1785-L40E to connect directly to standard network infrastructure. This facilitates faster data rates compared to traditional DH+ and allows for remote troubleshooting and programming across the plant's LAN without specialized interface cards in the PC.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhat are the addressing limitations for I\/O modules?\u003c\/span\u003eThe controller supports 2-slot, 1-slot, and 1\/2-slot addressing. When using \u003cspan\u003e2-slot addressing\u003c\/span\u003e, 16-point modules must be used in I\/O pairs, and 32-point modules are not supported. For higher density requirements, \u003cspan\u003e1\/2-slot addressing\u003c\/span\u003e should be used, which allows any mix of 8, 16, or 32-point modules.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHow critical is the 1770-XYC battery?\u003c\/span\u003eThe \u003cspan\u003e1770-XYC\u003c\/span\u003e lithium battery is essential for backing up the 48k words of user memory and the real-time clock when the system is powered down. Without a functional battery, the program and configuration data will be lost during a power cycle.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eField Engineering \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eChassis Selection:\u003c\/span\u003e The 1785-L40E must be installed in the \u003cspan\u003eleftmost slot\u003c\/span\u003e of a 1771-A1B, -A2B, -A3B, or -A4B Universal I\/O chassis. Ensure the backplane power supply is rated for at least \u003cspan\u003e3.6 A\u003c\/span\u003e to accommodate the controller's current draw.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eEnvironmental Shielding:\u003c\/span\u003e While the controller is rated for \u003cspan\u003e0 to 60 °C\u003c\/span\u003e, it is an open-style module. It must be installed in a NEMA-rated industrial enclosure to meet \u003cspan\u003eCISPR 11 Class A\u003c\/span\u003e emissions standards and to protect against conductive dust and moisture.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCable Selection:\u003c\/span\u003e For Ethernet connectivity, use 802.3 compliant shielded or unshielded twisted pair cabling. For Remote I\/O or DH+ networks, use \u003cspan\u003e1770-CD (Blue Hose)\u003c\/span\u003e cable to ensure signal integrity and impedance matching across long distances.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan\u003e1785-L40E\u003c\/span\u003e represents a bridge between legacy reliability and modern connectivity. By integrating Ethernet directly into the proven PLC-5 architecture, Allen-Bradley provides an upgrade path that does not require replacing the entire 1771 I\/O infrastructure. For B2B procurement, sourcing an original \u003cspan\u003e1785-L40E\u003c\/span\u003e ensures compliance with \u003cspan\u003eUL, CSA, and CE\u003c\/span\u003e industrial standards, providing the high vibration (2 g) and shock (30 g) resistance required for the most demanding manufacturing environments.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52695191388523,"sku":"1785-L40E","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/allen-bradley-1785-l40e-cpu-module-kxser2dhzfv_9290a747-4043-42d8-8c69-030ea48e06d6.jpg?v=1766114643","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1785-l40e-ethernet-plc-5-programmable-controller","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}