{"product_id":"allen-bradley-1785-l26b-industrial-automation-module-heavy-duty","title":"Allen-Bradley 1785-L26B Industrial Automation Module - Heavy-Duty","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1785-L26B is a PLC-5\/26 standard processor designed for robust control in demanding industrial environments. This industrial automation module delivers dependable performance with 16K of battery-backed SRAM, ensuring your program remains secure during power interruptions. With support for up to 512 analog I\/O or 512 discrete I\/O in any mix, the 1785-L26B offers flexible configuration to match your application needs.\u003c\/p\u003e\u003cp\u003eBuilt for seamless integration, the 1785-L26B works with most 1771, 1794, 1746, and 1791 I\/O modules, and its multiple communication ports—including RS-232\/422\/423, DH+, and Remote I\/O—provide versatile connectivity options. Whether you are upgrading an existing PLC-5 system or building a new control solution, this processor delivers the reliability and performance you expect from Allen-Bradley.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\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\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1785-L26B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eStandard Processor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcessor\u003c\/td\u003e\n\u003ctd\u003ePLC-5\/26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax User Memory Words\u003c\/td\u003e\n\u003ctd\u003e16 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\u003eProtected Memory\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Total I\/O\u003c\/td\u003e\n\u003ctd\u003e512 (any mix) or 512 in + 512 out (complementary)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Analog I\/O\u003c\/td\u003e\n\u003ctd\u003e512\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\u003e13\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\u003eMax I\/O Chassis Universal Remote\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRS-232-C\/422-A\/423-A Ports\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Coprocessor Expansion Port\u003c\/td\u003e\n\u003ctd\u003eYes\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\u003eBattery-backed SRAM:\u003c\/strong\u003e Retains your program and data even during power loss, minimizing downtime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible I\/O capacity:\u003c\/strong\u003e Supports up to 512 I\/O points, allowing you to scale your system as needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple communication ports:\u003c\/strong\u003e RS-232\/422\/423, DH+, and Remote I\/O ports enable easy integration into existing networks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtected memory:\u003c\/strong\u003e Safeguards critical data from unauthorized access or accidental modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide environmental tolerance:\u003c\/strong\u003e Operates in temperatures from 0 to 60°C and humidity up to 95% without condensation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe 1785-L26B is ideal for applications requiring reliable control and monitoring, such as:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eManufacturing assembly lines\u003c\/li\u003e\n\u003cli\u003eMaterial handling systems\u003c\/li\u003e\n\u003cli\u003eProcess control in chemical or food processing plants\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIn a typical manufacturing line, the processor manages multiple I\/O points, coordinating machine actions and ensuring smooth operation. Its robust design and flexible I\/O configuration make it a dependable choice for critical processes.\u003c\/p\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eInstall the Allen-Bradley 1785-L26B in the left-most slot of a 1771 I\/O chassis. Ensure the backplane provides 5 VDC with at least 2.6 amps available. Connect the serial port (25-pin D-shell) to your programming terminal using a standard RS-232 cable. For network connectivity, attach the DH+ port to the Data Highway Plus network and the Remote I\/O port (Channel 1B) to remote racks.\u003c\/p\u003e\u003cp\u003eWhen configuring the processor, select the appropriate I\/O addressing mode (2-slot, 1-slot, or half-slot) based on your module types and density. Refer to the user manual for detailed configuration steps.\u003c\/p\u003e\u003ch2\u003eMaintenance \u0026amp; Reliability\u003c\/h2\u003e\u003cp\u003eRegular maintenance ensures long-term reliability. Periodically check the battery voltage to guarantee SRAM retention. Inspect the chassis and connections for dust or corrosion. The processor withstands operational shock of 30G and vibration of 1G at 10-500 Hz, making it suitable for harsh environments.\u003c\/p\u003e\u003cp\u003eFor extended reliability, consider using an EEPROM backup module (1785-ME16, -ME32, -ME64, or -M100) to store your program externally. This provides an extra layer of security against memory loss.\u003c\/p\u003e\u003ch2\u003eCompatibility \u0026amp; Integration\u003c\/h2\u003e\u003cp\u003eThe 1785-L26B integrates seamlessly with a wide range of Allen-Bradley I\/O modules, including 1771, 1794, 1746, and 1791 series. It supports up to 13 I\/O chassis (12 universal remote and 0 extended local). The processor communicates via standard serial interfaces (RS-232, RS-422, RS-423) and DH+ networks, ensuring compatibility with existing Rockwell Automation systems.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing, verify that your application requires a PLC-5\/26 processor and that the I\/O capacity fits your needs. Confirm the backplane power supply can deliver 2.6 A at 5 VDC. Also, check the communication ports required—if you need DH+ or Remote I\/O, this model supports both.\u003c\/p\u003e\u003cp\u003eAt PLC Source PRO, we supply genuine, tested automation parts. Our inventory includes the Allen-Bradley 1785-L26B and compatible accessories. Contact our team for availability and pricing.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44436143865955,"sku":"1785-L26B","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1785-BCM_bf76a515-1e4f-46ad-b395-0eacaeda8f2a.jpg?v=1785793414","url":"https:\/\/www.plcsourcepro.com\/products\/allen-bradley-1785-l26b-industrial-automation-module-heavy-duty","provider":"PLC Source PRO","version":"1.0","type":"link"}