Reliable and Versatile Control for Industrial Automation

The Allen-Bradley 1747-L533 stands as a cornerstone of the SLC 500 platform, delivering a perfect balance of power, flexibility, and cost-effectiveness. As an SLC 5/03 processor, this module provides engineers with an advanced instruction set based on the legendary PLC-5 architecture. Whether you manage small-scale process control, intricate material handling systems, or complex HVAC units, the 1747-L533 offers the processing speed and memory capacity required to maintain peak operational efficiency.

Comprehensive Technical Specifications

The 1747-L533 processor integrates seamlessly into the SLC 500 chassis system. Below are the essential technical parameters:

• Manufacturer: Allen-Bradley / Rockwell Automation
• Product Line: SLC 500
• Part Number: 1747-L533
• Processor Type: SLC 5/03
• User Memory: 32,000 Words (28K for program/data; 4K for data only)
• I/O Capacity: Supports up to 4,096 Inputs and 4,096 Outputs
• Local Analog I/O: Up to 480 points
• Program Scan Time: 1.0 millisecond per keyword (typical)
• Bit-Instruction Execution: 0.44 microseconds
• Communication Ports: 1 x DH-485; 1 x RS-232 (Channel 0)
• Backplane Current: 500 mA @ 5V DC; 175 mA @ 24V DC
• Chassis Support: Maximum of 3 local chassis and 30 I/O slots
• Operating Temperature: 0°C to 60°C (32°F to 140°F)

Advanced Communication and Integration

The 1747-L533 excels in connectivity. It features two built-in communication ports that allow for diverse networking strategies:

1. DH-485 Port: This port facilitates high-speed communication between other SLC 500 processors and peripheral devices like PanelView HMIs. It remains a standard for reliable data exchange in localized industrial networks.
2. RS-232 Port (Channel 0): This versatile port supports multiple protocols, including DF1 Full-Duplex, DF1 Half-Duplex, and ASCII. Users often configure this port for point-to-point connections with modems, scanners, or third-party devices. Furthermore, it supports the 1761-NET-AIC converter for integration into DH-485 networks via the serial interface.

High-Performance Processing Power

The SLC 5/03 architecture significantly improves system throughput compared to earlier SLC models. With a bit-execution time of just 0.44 microseconds, the 1747-L533 handles logic-intensive applications with ease. The processor also supports online programming, allowing technicians to modify code and troubleshoot logic without shutting down the production line.

Additional functional highlights include:

• Floating-Point Math: Enables the processor to perform complex calculations required for precise process variables.
• Built-in Real-Time Clock (RTC) and Calendar: Crucial for time-stamping events and scheduling automated tasks.
• Flash Backup Memory: Provides a secure way to store program data, ensuring the system recovers quickly after a power loss or battery failure.
• Physical Key-Switch: Offers three positions (RUN, PROG, and REMOTE) to prevent unauthorized program changes and enhance facility security.

Scalability and System Expansion

The 1747-L533 supports extensive hardware expansion. By adding a Remote I/O Scanner or a DeviceNet Scanner module, users can bridge the processor to distributed I/O racks across a large facility. This scalability makes the 1747-L533 an ideal choice for SCADA applications where data must be collected from multiple remote locations and centralized for monitoring.

Maintenance and Legacy Support

As a mature product in the Allen-Bradley catalog, the 1747-L533 is a vital component for facilities looking to maintain or repair existing SLC 500 installations. Its robust design withstands harsh industrial environments, featuring a 30g operating shock rating. We specialize in providing high-quality 1747-L533 units, ensuring your legacy systems continue to run reliably without the immediate need for a full platform migration.