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- Allen Bradley
- 1785-LT
- PLC-5/15 Processor
- USA
- 165 x 51 x 89 mm
- 1.339 kg
- Xiamen, China
- New & In Stock
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- 1-3 Working Days
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
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Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
The Allen Bradley 1785-LT is a PLC-5/15 Processor, designed as an entry-level CPU for smaller PLC-5 systems. It is ideal for compact industrial automation applications where moderate processing speed and smaller I/O configurations are sufficient. The LT model provides reliable, cost-effective control for smaller-scale or less complex industrial processes.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Allen Bradley |
| Model | 1785-LT |
| Product Type | PLC Processor |
| Function | Central processing unit for PLC-5 systems |
| Compatibility | PLC-5 I/O modules and racks |
| Dimensions | 165 × 51 × 89 mm |
| Weight | 1.339 kg |
| Operating Environment | Industrial automation and process control systems |
Function and Working Principle
The 1785-LT operates by:
- Executing PLC programs for control tasks
- Reading input signals from connected PLC-5 I/O modules
- Generating output commands to machinery and devices
- Handling basic communication with HMIs or other PLCs
- Managing moderate memory and program sizes for smaller automation systems
It acts as the central control unit, providing reliable and deterministic operation for small-scale industrial applications.
Role in Industrial Automation
This processor is essential for:
- Controlling small-scale manufacturing processes
- Coordinating limited I/O modules in compact PLC-5 systems
- Providing deterministic and reliable control for entry-level automation
- Cost-effective solution for applications not requiring high processing power
Industrial Applications
Typical applications include:
- Small assembly lines or production machines
- Light process control in chemical, water treatment, or packaging systems
- Compact material handling and logistics equipment
- Entry-level automation where limited logic and I/O management are needed
Installation and System Integration
Installation steps:
- Insert the 1785-LT processor into a compatible PLC-5 rack
- Connect PLC-5 I/O modules and power supply
- Configure using RSLogix 5 or compatible software
- Verify program execution, input/output operation, and basic network communication
The compact and rugged design ensures easy integration and reliable operation in industrial environments.
Compatible System Components
- PLC-5 I/O racks and modules
- Allen Bradley communication modules (for small networked systems)
- RSLogix 5 programming software
- HMIs and operator interface panels
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| Allen Bradley 1785-LT | PLC Processor | Entry-level PLC-5 CPU | Small-scale automation systems |
| Allen Bradley 1785-L20B | PLC Processor | PLC-5/20 CPU | Mid-range control and moderate I/O |
| Allen Bradley 1785-L30B | PLC Processor | PLC-5/30 CPU | Mid-to-large automation systems |
| Allen Bradley 1785-L40 | PLC Processor | PLC-5/40 CPU | High-performance industrial control |
Key Advantages
- Reliable entry-level PLC-5 control
- Compact form factor for small racks
- Supports moderate program and I/O sizes
- Rugged industrial-grade design
- Cost-effective solution for smaller-scale automation applications
Technical FAQs
How does the 1785-LT compare to the L20 or L30 series?
The LT is entry-level, supporting smaller programs and fewer I/O modules, while the L20 and L30 series offer higher processing power and expanded memory for larger systems.
Which I/O modules is it compatible with?
Compatible with all PLC-5 I/O racks and modules, but designed for smaller I/O configurations.
Does it support network communication?
Yes, basic communication is supported via Allen Bradley communication modules for small networks.
Where is it typically applied?
Used in small-scale industrial automation systems where cost-effective, reliable control is needed without extensive processing power.
Conclusion
The Allen Bradley 1785-LT PLC-5/15 Processor is an entry-level, reliable CPU designed for small-scale PLC-5 automation systems. With compact size, rugged design, and cost-effective operation, it is ideal for industrial applications requiring deterministic control without the need for large memory or high-speed processing.