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Allen-Bradley 1785-LT3
by Allen-Bradley
Read verified buyer reviews ↓OverviewThe Allen-Bradley 1785-LT3 PLC-5/12 Processor is designed for dependable operation in various industrial automation settings, from small to medium scale. This processor incorporates 6K words of SRAM memory, offering ample capacity for essential automation programs, along with a comprehensive 512 total I/O capacity, including 256 analog I/O points. Featuring a DH+ (Data Highway Plus) channel and a remote I/O channel in adapter/scanner mode, the 1785-LT3 ensures rapid data exchange and smooth integration within intricate industrial networks. Its compatibility with the Rockwell Automation PLC-5 platform makes it an excellent choice for enhancing or maintaining existing systems in sectors such as manufacturing, process automation, and machine control, where reliability and precision are critical.Key Features 6K Word SRAM Memory: Supports a wide range of critical automation programs and complex logic. 512 Total I/O Capacity: Allows extensive connections for multiple input and output devices. 256 Analog I/O Support: Enables precise oversight and regulation of analog signals for important processes. 1 DH+ Channel: Provides high-speed, dependable data communication across industrial networks. 1 Remote I/O Channel (Adapter/Scanner): Offers flexible connectivity for distributed I/O modules, improving system scalability. PLC-5 Platform Compatibility: Ensures simple integration with current Rockwell Automation infrastructure. Reliable Industrial Performance: Constructed to endure challenging industrial environments, guaranteeing continuous operation. Technical Specifications Model: 1785-LT3 Processor Type: PLC-5/12 Memory: 6K Word SRAM Total I/O Capacity: 512 I/O Analog I/O Capacity: 256 Analog I/O Communication Ports: 1 DH+ Channel 1 Remote I/O Channel (Adapter/Scanner) Mounting: PLC-5 Chassis-Based Certifications: UL, CE, RoHS Applications Industrial Automation & Machine Control: Powers efficient and accurate regulation of machinery and automated processes. Process Control & SCADA Systems: Facilitates real-time monitoring, data acquisition, and automated control in complex operations. Material Handling & Conveyor Systems: Optimizes logistics and workflow in production and distribution facilities. Power & Utility Management: Delivers reliable automation for essential infrastructure systems. Manufacturing & Packaging Systems: Supports adaptable and efficient control in diverse production and packaging lines. Automotive Manufacturing: Manages assembly lines and robotic operations with high precision. Why Choose Enhanced System Resilience: The sturdy design and reliable communication channels of the 1785-LT3 contribute to increased uptime and reduced maintenance. Seamless Integration: Its PLC-5 platform compatibility enables straightforward integration into existing Allen-Bradley systems, minimizing deployment time and costs. Precision Control Capability: With 256 analog I/O, this processor delivers the accuracy needed for sensitive process control applications. Scalable I/O Management: The 512 total I/O capacity and remote I/O capabilities offer flexibility for expanding and adapting your automation systems as requirements change. Trusted Allen-Bradley Quality: Benefit from the renowned dependability and performance of Allen-Bradley products, ensuring long-term operational success. Optimized for Legacy and Modern Systems: Bridges older PLC-5 installations with the demand for modern, efficient control. Order NowUpgrade your industrial automation capabilities with the Allen-Bradley 1785-LT3 PLC-5/12 Processor. Experience high-speed data exchange, flexible I/O handling, and exceptional system control. Benefit from our fast shipping and worldwide delivery options. For a comprehensive overview of compatible models and specifications, explore our PLC-5 Programmable Controllers main category. Discover the full spectrum of controllers, drives, motors, HMIs, and accessories within our Allen-Bradley Industrial Automation Products.FAQHow much memory does the 1785-LT3 processor have?The 1785-LT3 processor is equipped with 6K words of SRAM memory.What is the total I/O capacity of this module?This module offers a total I/O capacity of 512 I/O points.Does the 1785-LT3 support analog I/O?Yes, it supports 256 analog I/O points for precise signal control.What communication channels are included?It includes one DH+ channel and one remote I/O channel (adapter/scanner).Is this processor compatible with existing Allen-Bradley systems?Yes, it is fully compatible with the Rockwell Automation PLC-5 platform for seamless integration.
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Allen-Bradley 1785-LT3
Overview
This is a genuine Allen-Bradley component from the PLC-5 Platform (Legacy) family. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.
Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.
Key Features
- Genuine Allen-Bradley catalog part
- Tested before shipment
- Backed by PalmPartsSolution warranty
- Cross-reference and revision assistance available
- Compatible with the broader Allen-Bradley automation ecosystem
- Engineered to integrate inside PLC-5 Platform (Legacy) installations
Compatibility
When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:
- Input/output voltage and current rating
- Communication protocol and network role
- Mounting form factor and footprint
- Operating temperature, humidity, and IP rating
- Required certifications (UL, CE, ATEX, marine, etc.)
Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.
Replacement Information
Three ways to source this part through PalmPartsSolution:
- Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
- Form-fit-function equivalent — alternate revision or build that drops in without code changes
- Engineered migration — current-generation Allen-Bradley platform with documented conversion notes for the PLC-5 Platform (Legacy) family
Contact our engineering team if you need help choosing between these tracks.
Technical Specifications
- Model: 1785-LT3
- Processor Type: PLC-5/12
- Memory: 6K Word SRAM
- Total I/O Capacity: 512 I/O
- Analog I/O Capacity: 256 Analog I/O
- Communication Ports:
- 1 DH+ Channel
- 1 Remote I/O Channel (Adapter/Scanner)
- Mounting: PLC-5 Chassis-Based
- Certifications: UL, CE, RoHS
Applications
- Industrial Automation & Machine Control: Powers efficient and accurate regulation of machinery and automated processes.
- Process Control & SCADA Systems: Facilitates real-time monitoring, data acquisition, and automated control in complex operations.
- Material Handling & Conveyor Systems: Optimizes logistics and workflow in production and distribution facilities.
- Power & Utility Management: Delivers reliable automation for essential infrastructure systems.
- Manufacturing & Packaging Systems: Supports adaptable and efficient control in diverse production and packaging lines.
- Automotive Manufacturing: Manages assembly lines and robotic operations with high precision.
Why Choose the 1785-LT3?
- Enhanced System Resilience: The sturdy design and reliable communication channels of the 1785-LT3 contribute to increased uptime and reduced maintenance.
- Seamless Integration: Its PLC-5 platform compatibility enables straightforward integration into existing Allen-Bradley systems, minimizing deployment time and costs.
- Precision Control Capability: With 256 analog I/O, this processor delivers the accuracy needed for sensitive process control applications.
- Scalable I/O Management: The 512 total I/O capacity and remote I/O capabilities offer flexibility for expanding and adapting your automation systems as requirements change.
- Trusted Allen-Bradley Quality: Benefit from the renowned dependability and performance of Allen-Bradley products, ensuring long-term operational success.
- Optimized for Legacy and Modern Systems: Bridges older PLC-5 installations with the demand for modern, efficient control.
Availability & Shipping
- ▸In stock: 1785-LT3 ready for immediate dispatch from our Florida warehouse.
- ▸Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
- ▸Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
- ▸Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
- ▸Buy with confidence: Every 1785-LT3 ships with a 1-Year PALM Parts warranty and a 30-day return window.
Frequently Asked Questions — Allen-Bradley
Machine down? We ship parts the same day.
New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.
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Independent Supplier Notice
PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.
Product Condition & Firmware
All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.