Allen-Bradley 1769-L33ER CompactLogix 5370 Controller
Product Overview
The Allen-Bradley 1769-L33ER is a high-performance programmable automation controller (PAC) from Rockwell Automation's CompactLogix 5370 series. Designed for industrial automation applications requiring a balance of processing power, connectivity, and flexibility, this controller is engineered to meet the demands of medium-sized control systems. It combines robust processing capabilities, extensive I/O support, and seamless communication in a compact form factor, making it suitable for a wide range of industries, including manufacturing, material handling, packaging, and process control.
As part of the CompactLogix family, the 1769-L33ER is designed to provide a cost-effective yet powerful solution for machine builders and end users. It supports multiple network protocols, local I/O expansion, and integration into larger plant networks, allowing for efficient operation in both standalone and distributed applications. The controller is also built to operate reliably in challenging industrial environments, with a robust design that ensures consistent performance under varying conditions
.
Key Features and Capabilities
Processing Power and Memory
The 1769-L33ER is equipped with a modern processor and 2 MB of user memory
. This memory capacity provides sufficient space for user programs, data storage, and communication tasks, ensuring efficient handling of control algorithms and real-time processing. The controller's operating system is
flash-upgradeable, allowing users to update firmware for new features and improvements without replacing hardware. Additionally, it supports an
optional non-volatile memory card with a capacity of 1GB, expandable to 2GB, for enhanced data storage and program backup
.
Communication and Networking
The 1769-L33ER boasts versatile communication capabilities through its integrated ports:
The controller's support for EtherNet/IP enables real-time data exchange, peer-to-peer messaging, and integration with supervisory control and data acquisition (SCADA) systems. This connectivity is essential for modern industrial Internet of Things (IIoT) applications and Industry 4.0 initiatives.
I/O Capabilities and Expansion
A standout feature of the 1769-L33ER is its extensive I/O support. It can accommodate up to 16 local I/O modules and up to three I/O expansion groups using appropriate extension cables
. This flexibility allows users to tailor the control system to their specific application needs, whether for discrete, analog, or specialty I/O requirements. The controller's modular design enables easy expansion as application demands grow.
Environmental Robustness and Certifications
Built for industrial environments, the 1769-L33ER operates reliably in a temperature range of 0°C to 60°C (32°F to 140°F) and relative humidity from 5% to 95% (non-condensing)
. It is designed to resist vibration and shock, complying with relevant industrial standards. The controller holds certifications including
CE, UL, and cUL, ensuring compliance with international safety and quality standards. Its
open-style enclosure (IP20 rating) provides basic protection but requires installation in a suitable cabinet for full environmental protection
.
Power Requirements and Consumption
The 1769-L33ER requires a 24V DC power supply and is compatible with various Allen-Bradley power modules, such as the 1769-PA4, 1769-PA2, and 1769-PB4
. It has a
backplane current consumption of 500 mA @ 5V DC and a
maximum power consumption of 4.5 watts
. This low power consumption contributes to energy efficiency and reduces heat generation within control panels.
Technical Specifications
The following table summarizes the key technical specifications of the Allen-Bradley 1769-L33ER controller:
System Configuration and Installation
Hardware Configuration
The 1769-L33ER is designed for easy installation on standard DIN rails or panel mounts. Its compact dimensions and lightweight design (0.31 kg) allow for flexible mounting in space-constrained control cabinets
. The controller's open-style enclosure facilitates heat dissipation but requires installation in a protected environment to avoid exposure to dust, moisture, and physical damage.
When integrating the module, it is crucial to adhere to the recommended wiring practices and environmental conditions to ensure optimal performance. The controller can be used with various Allen-Bradley power supplies, such as the 1769-PA4, 1769-PA2, and 1769-PB4, providing flexibility in system design
.
Software Configuration
The 1769-L33ER is configured and programmed using Rockwell Automation's Studio 5000 Logix Designer software. This integrated development environment allows users to define system parameters, set up diagnostics, and integrate the controller into the broader control system. The software supports online monitoring and troubleshooting, enabling real-time visibility into system performance and status.
Applications
The 1769-L33ER is suitable for a wide range of industrial automation applications, including:
-
Manufacturing Automation: Controlling production lines, assembly machines, and robotic systems in automotive, electronics, and consumer goods industries.
-
Material Handling: Managing conveyor systems, sortation equipment, and automated guided vehicles (AGVs) in warehouses and distribution centers.
-
Process Control: Monitoring and controlling parameters like temperature, pressure, and flow in chemical, pharmaceutical, and food processing plants.
-
Packaging Machinery: Coordinating fillers, sealers, labelers, and other equipment in packaging lines.
-
Building Automation: Integrating into HVAC control systems, lighting control, and access control systems.
Its extensive I/O support (up to 16 modules) and communication capabilities make it ideal for applications requiring multiple control signals and seamless integration into broader network architectures.
Comparison and Considerations
When selecting the 1769-L33ER controller, consider the following aspects:
-
Memory Requirements: The 2 MB user memory is sufficient for many medium-sized applications; however, for larger or more complex programs, additional memory expansion may be necessary.
-
I/O Needs: The ability to support up to 16 local I/O modules provides flexibility for expanding systems as needed.
-
Environmental Conditions: The operating temperature range (0-60°C) is adequate for most industrial environments; harsh conditions may require additional protection.
-
System Compatibility: The controller works with various Allen-Bradley power supplies and I/O modules; verify compatibility with your existing system components.
For applications requiring different performance levels, Allen-Bradley offers other controllers in the CompactLogix series, such as the 1769-L36ER (with more memory and I/O capacity) and 1769-L16ER (with lower memory and I/O capacity).
Conclusion
The Allen-Bradley 1769-L33ER CompactLogix 5370 controller is a versatile and reliable solution for industrial automation applications requiring a balance of performance, flexibility, and cost-effectiveness. Its 2 MB user memory, support for up to 16 I/O modules, and seamless communication capabilities make it a valuable component in CompactLogix-based control systems. By leveraging its EtherNet/IP connectivity and expansion options, users can achieve efficient and scalable automation solutions.
While its open-style design requires installation in a protected environment, the controller's performance and compatibility with Rockwell Automation's Integrated Architecture™ make it a dependable choice for diverse automation applications. For engineers and system integrators seeking a mid-range controller with proven reliability and ease of integration, the 1769-L33ER represents a practical option within Allen-Bradley's extensive product portfolio.
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