Allen-Bradley 1769-L16ER-BB1B CompactLogix 5370 Controller

Product Overview

The Allen-Bradley 1769-L16ER-BB1B is a programmable automation controller (PAC) from Rockwell Automation's CompactLogix 5370 series. Designed for industrial automation applications requiring a balance of performance, connectivity, and compact size, this controller is engineered to meet the demands of small to medium-sized control systems. It combines processing capability, integrated I/O, and flexible communication in a space-efficient form factor, making it suitable for a wide range of industries, including manufacturing, material handling, packaging, and infrastructure automation

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As part of the CompactLogix family, the 1769-L16ER-BB1B 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 seamless 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

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Key Features and Capabilities

Processing Power and Memory

The 1769-L16ER-BB1B is equipped with a modern processor and 384 KB 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

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Integrated I/O and Expansion Capabilities

A standout feature of the 1769-L16ER-BB1B is its integrated I/O configuration. It includes:

• 16 digital inputs (sinking type, 24V DC)

16 digital outputs (sourcing type, 24V DC)

This integrated I/O simplifies system design by reducing the need for additional modules in many applications. For expanded I/O needs, the controller supports up to six additional 1734 POINT I/O modules locally. The embedded I/O and any local expansion modules must not exceed the 1 Amp backplane current and 3 Amps field power current limits of the POINTbus

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Communication and Networking

The 1769-L16ER-BB1B boasts versatile communication capabilities through its integrated ports:

• Dual embedded Ethernet ports supporting EtherNet/IP protocol and Device Level Ring (DLR) topology for redundant and reliable network communication. These support 10/100 Mbps speed

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• An RS-232 serial port for connecting to legacy devices and supporting protocols like DF1, DH-485, and Modbus RTU

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• A USB port for programming and firmware updates

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The controller supports a maximum of 4 EtherNet/IP nodes

, making it suitable for smaller network environments. Its DLR capability enhances network resilience

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Programming and Software

The controller is programmed using Rockwell Automation's Studio 5000 Logix Designer environment (v20 or later for firmware v20)

. It supports multiple programming languages per the IEC 61131-3 standard:

• Ladder Logic (LAD)

• Structured Text (ST)

• Function Block Diagram (FBD)

• Sequential Function Chart (SFC)

The controller supports 32 tasks (continuous, periodic, or event-driven), with each task containing up to 100 programs

. This structure allows for organized and modular application design.

Environmental Robustness and Certifications

Built for industrial environments, the 1769-L16ER-BB1B operates reliably in a temperature range of 0°C to 60°C 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.

Technical Specifications

The following table summarizes the key technical specifications of the Allen-Bradley 1769-L16ER-BB1B controller:

System Configuration and Programming

Hardware Configuration

The 1769-L16ER-BB1B is designed for DIN rail mounting

. Its compact form factor saves panel space. The integrated I/O simplifies wiring for basic digital applications. For expansion, 1734 POINT I/O modules must be installed to the right of the controller and within the system's power limits

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Software and Programming

Programming and configuration are performed using Rockwell Automation's Studio 5000 Logix Designer software

. This integrated development environment supports the controller's full feature set, including task management, program organization, and communication setup. The controller's firmware can be updated via the USB port or through Studio 5000

.

Applications

The 1769-L16ER-BB1B is suited for various industrial automation applications, including:

• Small to Medium-Sized Machinery: Controlling assembly machines, test stands, and packaging equipment where its integrated I/O is sufficient or can be modestly expanded.

• Material Handling Systems: Managing conveyors, sortation systems, and automated guided vehicles (AGVs) in limited scope.

• Infrastructure Automation: Deploying in building management systems (HVAC, lighting control, access control) and water/wastewater treatment facilities due to its robust design

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• Renewable Energy Equipment: Controlling solar tracker systems or monitoring wind turbine parameters, leveraging its wide operating temperature range

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Its built-in communication features, particularly EtherNet/IP, facilitate integration into larger Industrial Internet of Things (IIoT) architectures for data collection and monitoring.

Comparison and Considerations

The 1769-L16ER-BB1B is an entry-level model within the CompactLogix 5370 series. Its key differentiator is its integrated digital I/O, which can reduce hardware costs for applications with modest point counts. However, its limit of 4 EtherNet/IP nodes and 384 KB memory make it less suitable for large, complex, or data-intensive applications compared to higher-end models like the 1769-L18ER-BB1B (512 KB memory) or 1769-L24ER (750 KB memory)

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When selecting a controller, consider:

• I/O Requirements: The integrated 32 points may suffice, but expansion is limited to 6 modules.

• Network Needs: The 4-node EtherNet/IP limit is suitable for smaller networks.

• Memory Needs: 384 KB is adequate for typical ladder logic and data handling in small systems.

• Environmental Conditions: The operating temperature and humidity ranges make it suitable for most industrial environments.

Conclusion

The Allen-Bradley 1769-L16ER-BB1B CompactLogix 5370 controller is a compact, versatile, and cost-effective automation solution designed for small to medium-sized applications. Its combination of integrated digital I/O, essential communication protocols (including EtherNet/IP), and ruggedized design makes it a reliable choice for engineers and machine builders seeking a balance between functionality and space efficiency.

As part of Rockwell Automation's integrated architecture, it provides connectivity within the broader ecosystem of Allen-Bradley components and software tools. Whether deployed in manufacturing, material handling, or infrastructure automation, the 1769-L16ER-BB1B delivers the essential performance, connectivity, and reliability needed for streamlined industrial control, particularly where footprint and cost are key considerations.