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- 25 × 16.6 × 5.9 cm
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Allen Bradley 1747-L511 Detailed Product Introduction and Technical Specifications
Product Overview
The Allen Bradley 1747-L511 is a SLC 5/01 programmable logic controller CPU module designed for the SLC 500 automation system. It is an entry-level industrial PLC processor used for small-scale control applications requiring stable logic execution and basic communication capability.
This controller is part of a fixed-function architecture where the processor is designed to handle limited memory, simple I/O structures, and DH-485 communication for programming and monitoring purposes.
It is widely used in industrial automation systems such as small machinery control, material handling equipment, HVAC systems, and basic production line automation.
The 1747-L511 is known for its simplicity, reliability, and long-term use in legacy industrial installations that still operate SLC 500 platforms.
Brand Information
| Item | Details |
|---|---|
| Brand | Allen Bradley |
| Product Model | 1747-L511 |
| Product Type | PLC CPU Module |
| Product Family | SLC 500 Series |
| Series | SLC 5/01 Controller Series |
| Main Function | Central Processing Unit for PLC Control |
| Communication | DH-485 (Slave Mode Only) |
| Installation Type | Modular Rack CPU |
Product Series Introduction
SLC 500 Series Overview
The SLC 500 series is a modular PLC platform designed for industrial automation control systems.
It supports scalable configurations ranging from small fixed controllers to large modular rack-based systems.
The system is widely used in manufacturing, process control, and machine automation due to its reliability and long service life.
The 1747-L511 belongs to the SLC 5/01 processor family, which is the most basic CPU level in the SLC 500 range.
Detailed Technical Specifications of 1747-L511
| Parameter | Specification |
|---|---|
| Model | 1747-L511 |
| Processor Type | SLC 5/01 CPU |
| Memory Capacity | 1K Instructions (approx. 1 KB user memory) |
| I/O Capacity | Up to 960 local I/O points |
| Analog I/O Support | Up to 480 points |
| Program Scan Time | 4.8 ms / K instruction (typical) |
| I/O Scan Time | 1.6 ms (typical) |
| Maximum I/O Chassis | 3 chassis |
| Module Slots Supported | Up to 30 slots |
| Communication Port | DH-485 |
| Communication Mode | Slave only (cannot initiate messages) |
| Backplane Current (5V DC) | 350 mA |
| Backplane Current (24V DC) | 105 mA |
| Memory Type | Battery-backed RAM |
| Backup Memory | EEPROM supported |
| Battery Support | 1747-BA battery |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Power Supply Compatibility | 1746-P1 to 1746-P7 |
| Dimensions | 25 × 16.6 × 5.9 cm |
| Weight (kg) | 0.32 kg |
Product Features
1. Entry-Level PLC Processor Design
The 1747-L511 is designed as a basic PLC CPU for simple industrial automation tasks.
It provides sufficient processing capability for small machines and low-complexity control systems.
2. DH-485 Communication Capability
The controller supports DH-485 communication for programming and system monitoring.
However, it operates only in slave mode, meaning it cannot initiate network communication requests.
3. Compact and Modular Architecture
The CPU is designed for installation in SLC 500 chassis systems.
It integrates seamlessly with other I/O modules and power supplies in the same rack system.
4. Stable Industrial Execution
The processor provides predictable scan times suitable for deterministic control applications.
This ensures stable operation in repetitive industrial processes.
5. Battery-Backed Memory Protection
The system uses battery-backed RAM to retain program data during power loss.
This ensures system recovery without requiring reprogramming after shutdown events.
Product Applications
Small Machine Control
Used in compact machinery such as presses, cutters, and simple assembly equipment.
Material Handling Systems
Applies to conveyor systems and basic automated transport equipment.
HVAC Control Systems
Common in heating, ventilation, and air conditioning control systems in industrial buildings.
Packaging Equipment
Used in small packaging machines requiring simple logic and timing control.
Legacy Industrial Systems
Widely installed in older SLC 500-based automation systems still in operation today.
Product Advantages
| Advantage | Description |
|---|---|
| Simple Architecture | Easy to configure and maintain |
| Stable Performance | Reliable scan cycle execution |
| Compact Design | Suitable for small control systems |
| Low Power Consumption | Efficient backplane usage |
| Long-Term Reliability | Proven industrial durability |
| Modular Compatibility | Works with SLC 500 I/O systems |
| Battery Backup Support | Prevents data loss during power failure |
| Cost-Effective Solution | Ideal for basic automation systems |
Recommended Models from the Same Series or Related Series
| Model | Product Type | Main Function | Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1747-L511 | PLC CPU | Basic control processor | Small automation systems | 25 × 16.6 × 5.9 cm | 0.32 kg |
| 1747-L514 | CPU Module | Enhanced SLC 5/01 CPU | Industrial control | 25 × 16.6 × 5.9 cm | 0.35 kg |
| 1747-L524 | CPU Module | Higher memory PLC CPU | Medium systems | 25 × 16.6 × 5.9 cm | 0.38 kg |
| 1747-L541 | Advanced CPU | High-performance processor | Process control | 20 × 16 × 17 cm | 1.80 kg |
| 1747-L553 | High-end CPU | Network-capable controller | Complex automation | 21 × 17 × 18 cm | 2.10 kg |
Recommended Popular Models from Same Brand
| Model | Product Category | Main Features | Application Area | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1756-EN2TR | Ethernet Module | Dual Ethernet/IP ports | Industrial networking | 14 × 11 × 8 cm | 0.45 kg |
| 1769-L33ER | Compact PLC | Integrated Ethernet/IP | Machine automation | 18 × 12 × 9 cm | 0.92 kg |
| 1756-IB16 | Input Module | 16 digital inputs | Factory systems | 15 × 11 × 6 cm | 0.30 kg |
| 1769-IF8 | Analog Module | 8-channel analog input | Process control | 12 × 9 × 5 cm | 0.35 kg |
| 1783-US8T | Ethernet Switch | Managed industrial switch | Network communication | 16 × 12 × 5 cm | 0.80 kg |
Communication Role in SLC 500 Systems
The 1747-L511 functions as the central processing unit in SLC 500 PLC systems.
It executes control logic, processes inputs, and drives outputs through connected I/O modules.
Its DH-485 communication capability allows basic programming and system monitoring functions.
Installation and Maintenance Characteristics
The CPU is installed into an SLC 500 chassis rack system.
Wiring and configuration are handled through associated modules and programming software.
LED indicators provide status information such as run, fault, and communication status.
Maintenance is minimal due to its stable and mature hardware design.
Industrial Reliability
The 1747-L511 is widely used in legacy automation systems due to its stable performance and long operational lifespan.
It is designed for continuous industrial operation in standard factory environments.
Even though it is an older model, it remains functional in many existing SLC 500 installations.
Summary
The Allen Bradley 1747-L511 is an entry-level SLC 5/01 PLC CPU designed for basic industrial automation tasks.
It provides stable control performance, simple architecture, and reliable DH-485 communication capability.
Its durability and simplicity make it suitable for small-scale industrial systems and long-running legacy installations.