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- 25 × 16.5 × 6 cm
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Allen Bradley 1747-L543 Detailed Product Introduction and Technical Specifications
Product Overview
The Allen Bradley 1747-L543 is a SLC 5/04 series programmable logic controller CPU module designed for the SLC 500 industrial automation platform. It is one of the highest memory-capacity processors in the SLC 5/04 family, built for complex industrial control systems requiring high-speed execution, large program storage, and robust network communication.
This controller is widely used in medium-to-large scale automation environments such as manufacturing lines, process industries, packaging systems, and distributed control architectures. It is especially suitable for systems requiring Data Highway Plus (DH+) networking and multi-node coordination.
The 1747-L543 is often deployed in long-life industrial systems due to its stability, mature architecture, and strong compatibility with existing SLC 500 hardware ecosystems.
Brand Information
| Item | Details |
|---|---|
| Brand | Allen Bradley |
| Product Model | 1747-L543 |
| Product Type | PLC CPU Module |
| Product Family | SLC 500 Series |
| Series | SLC 5/04 Controller Series |
| Main Function | Central Processing Unit for Industrial Automation |
| Communication | DH+ / RS-232 |
| Installation Type | Rack-mounted CPU Module |
Product Series Introduction
SLC 500 Series Overview
The SLC 500 series is a modular PLC system designed for industrial automation and machine control applications.
It provides a flexible architecture consisting of CPU modules, I/O modules, communication modules, and power supplies installed in a rack-based system.
The platform is widely used in manufacturing, process control, logistics, and packaging industries due to its reliability and long operational lifecycle.
The 1747-L543 belongs to the SLC 5/04 CPU family, which represents the highest memory configuration within the SLC 500 standard processor lineup.
Detailed Technical Specifications of 1747-L543
| Parameter | Specification |
|---|---|
| Model | 1747-L543 |
| Processor Type | SLC 5/04 CPU |
| User Memory | 64K words |
| Program/Data Memory | 60K program + 4K data |
| Instruction Execution Speed | ~0.9 ms / K instruction |
| Bit Execution Time | ~0.37 µs |
| I/O Capacity | 4096 inputs / 4096 outputs |
| Analog I/O Support | Up to 480 channels |
| Maximum I/O Chassis | 3 chassis |
| Maximum Module Slots | 30 slots |
| Communication Ports | DH+, RS-232 |
| Communication Protocols | DF1, DH-485, ASCII |
| Backplane Current (5V DC) | 1.0 A |
| Backplane Current (24V DC) | 125–200 mA |
| Memory Type | Battery-backed RAM |
| Backup Memory | Flash EPROM (1747-M13 compatible) |
| Battery Type | 1747-BA |
| Power Supply Compatibility | 1746-P1 to 1746-P7 |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Shock Resistance | 30G operating |
| Vibration Resistance | Industrial standard |
| Dimensions | 25 × 16.5 × 6 cm |
| Weight (kg) | 0.45 kg |
Product Features
1. Maximum Memory Capacity in SLC 5/04 Line
The 1747-L543 offers 64K words of memory, making it the highest-capacity CPU in the SLC 5/04 family.
This allows it to handle very large programs, complex logic structures, and extensive data processing tasks.
2. High-Speed Deterministic Processing
With approximately 0.9 ms per K instruction scan time, the controller delivers fast and predictable execution.
This is essential for real-time industrial automation systems requiring consistent cycle timing.
3. DH+ Network Communication
The integrated DH+ interface enables high-speed communication between multiple PLC nodes.
This supports distributed control architectures commonly used in large industrial plants.
4. Dual Communication Ports
The CPU includes both DH+ and RS-232 ports, allowing flexible integration with SCADA systems, HMIs, and programming terminals.
5. High I/O Scalability
Supports up to 4096 digital I/O points and 480 analog channels.
This makes it suitable for large-scale automation systems with extensive field device connectivity.
6. Advanced Control Capability
Supports complex instructions including PID control, math functions, and structured logic operations.
This enables use in process control and advanced machine automation.
7. Reliable Memory Retention
Battery-backed RAM ensures program integrity during power loss, while EPROM support enables backup storage.
Product Applications
Large Manufacturing Systems
Used in coordinated production lines requiring synchronized multi-machine control.
Process Industries
Applied in chemical, oil & gas, water treatment, and continuous process environments.
Packaging Automation
Controls high-speed packaging, labeling, and filling systems.
Material Handling Systems
Manages conveyors, sorting systems, and logistics automation networks.
Distributed Control Systems
Used in multi-node DH+ network architectures for plant-wide automation.
Product Advantages
| Advantage | Description |
|---|---|
| Highest Memory in SLC 5/04 | 64K word capacity |
| Fast Processing Speed | Sub-millisecond scan performance |
| Strong Network Capability | DH+ supports distributed systems |
| Large I/O Expansion | Suitable for complex plants |
| Stable Real-Time Control | Deterministic execution |
| Battery Backup System | Prevents data loss |
| Industrial Durability | Long operational lifespan |
| Legacy System Compatibility | Widely supported in existing plants |
Recommended Models from the Same Series or Related Series
| Model | Product Type | Main Function | Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1747-L531 | CPU Module | SLC 5/03 processor | Medium automation | 25 × 16.6 × 5.9 cm | 0.48 kg |
| 1747-L532 | CPU Module | Advanced SLC 5/03 CPU | Industrial control | 25 × 16.6 × 5.9 cm | 0.34 kg |
| 1747-L541 | CPU Module | SLC 5/04 controller | Large systems | 25 × 17 × 6 cm | 0.45 kg |
| 1747-L542 | CPU Module | High-performance CPU | Distributed control | 25 × 16.6 × 5.9 cm | 0.40 kg |
| 1747-L543 | CPU Module | Top-tier SLC 5/04 CPU | Complex automation | 25 × 16.5 × 6 cm | 0.45 kg |
Recommended Popular Models from Same Brand
| Model | Product Category | Main Features | Application Area | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1756-EN2TR | Ethernet Module | Dual Ethernet/IP | Industrial networking | 14 × 11 × 8 cm | 0.45 kg |
| 1769-L33ER | Compact PLC | Built-in Ethernet/IP | Machine automation | 18 × 12 × 9 cm | 0.92 kg |
| 1756-IB16 | Digital Input Module | 16-channel input | Factory systems | 15 × 11 × 6 cm | 0.30 kg |
| 1769-IF8 | Analog Input Module | 8-channel analog | Process control | 12 × 9 × 5 cm | 0.35 kg |
| 1783-US8T | Ethernet Switch | Managed switch | Industrial networks | 16 × 12 × 5 cm | 0.80 kg |
System Role in Industrial Automation
The 1747-L543 acts as the central processing unit in SLC 500 PLC systems.
It executes control logic, manages distributed I/O, and coordinates communication via DH+ networks.
Its high memory capacity and fast scan performance make it suitable for complex industrial automation environments.
Installation and Maintenance Characteristics
The CPU is installed in an SLC 500 rack system along with power supplies and I/O modules.
LED indicators display run status, faults, and communication activity.
Maintenance is straightforward due to modular design and mature architecture.
Battery replacement ensures long-term data retention capability.
Industrial Reliability
The 1747-L543 is widely used in industrial environments due to its stability, performance, and long lifecycle.
It remains one of the most powerful processors in the SLC 500 series and continues to operate in many legacy systems globally.
Summary
The Allen Bradley 1747-L543 is a high-end SLC 5/04 PLC CPU designed for large and complex industrial automation systems.
It provides 64K memory capacity, fast scan performance, and robust DH+ communication capability.
Its reliability, scalability, and long-term industrial durability make it a key controller in both modernized and legacy automation infrastructures.