Allen-Bradley 1769-L36ERMS CompactLogix Controller

Product Overview

The Allen-Bradley 1769-L36ERMS is a high-performance programmable automation controller (PAC) from Rockwell Automation's CompactLogix 5370 series. Designed for industrial automation applications requiring robust control, extensive I/O capabilities, and integrated motion control, this controller is engineered to meet the demands of complex manufacturing and process environments. It combines processing power, flexible connectivity, and scalability in a compact form factor, making it suitable for a wide range of industries, including automotive manufacturing, food and beverage processing, packaging, and water treatment

.

As part of the CompactLogix family, the 1769-L36ERMS is designed to provide a cost-effective yet powerful solution for machine builders and end users. It supports integrated motion control, extensive I/O expansion, and multiple network protocols, allowing for seamless integration into both new and existing automation systems. The controller also features built-in energy storage (eliminating the need for lithium batteries), enhancing reliability and reducing maintenance requirements

.

Key Features and Capabilities

Processing Power and Memory

The 1769-L36ERMS is equipped with a powerful processor and substantial memory resources to handle complex control tasks efficiently. It features 3 MB of standard user memory and 1.5 MB of safety memory, ensuring ample space for user programs, data storage, and safety-related functions. The controller supports up to 32 tasks (including one safety task) and allows for 100 program instances per task, enabling sophisticated and modular application design

.

For non-volatile storage, the controller includes support for SD memory cards (e.g., 1784-SD1 or 1784-SD2), providing a reliable means for program backup, firmware updates, and data logging without battery-backed RAM

.

Integrated I/O and Expansion Capabilities

This controller excels in its I/O handling and expansion capabilities. It supports:

• Up to 30 local 1769 series I/O modules, allowing for significant system customization and scalability.

• A maximum of 960 I/O points, catering to large and complex applications.

• Integrated 4-channel combination analog module (as part of its design), which includes 2 analog inputs (±10V DC or ±20mA) and 2 analog current outputs (0-20mA). This module features high resolution (14-bit) and robust performance with specifications such as a maximum output of 21A and 24V DC power requirement

• .

The analog outputs have a voltage range of 0 to 10.5V and a current load of 10mA, with protection features including short-circuit protection (up to 21mA) and over-voltage protection. The module requires no field calibration and offers an accuracy margin of ±0.5% for voltage and ±0.35% for current at full scale (25°C/77°F)

.

Communication and Networking

The 1769-L36ERMS is equipped with multiple communication ports for flexible networking:

• Dual embedded Ethernet ports supporting EtherNet/IP protocol and Device Level Ring (DLR) topology for redundant and reliable network communication

• .

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

• .

• A USB 2.0 port (device functionality only) for programming, firmware updates, and online editing at full speed (12 MB/s)

• .

The controller supports up to 48 EtherNet/IP nodes and 120 TCP connections, facilitating integration into larger plant networks and IIoT architectures

.

Integrated Motion Control

A standout feature of the 1769-L36ERMS is its integrated motion control capability. It supports up to 16 CIP motion axes (with kinematics functionality), making it ideal for applications requiring precise coordination of servo drives, such as in packaging machinery, material handling systems, and automated assembly lines. This integration simplifies system design and reduces the need for additional motion controllers

.

Security and Safety

The controller incorporates advanced security features, including digitally signed firmware and encryption capabilities, to help protect against unauthorized access and cyber threats. For safety-critical applications, it complies with international standards such as EN62061 and EN61511-1, and it holds certifications including c-UL-us, CE, RCM, Ex, KC, and EAC

.

Environmental Robustness

Built for industrial environments, the 1769-L36ERMS operates reliably in temperatures ranging from 0°C to 60°C and relative humidity from 5% to 95% (non-condensing). Its robust design ensures resistance to vibration and shock, complying with industrial standards like IEC 60068-2-6

.

Technical Specifications

The following table summarizes the key technical specifications of the Allen-Bradley 1769-L36ERMS controller:

System Configuration and Programming

Hardware Configuration

The 1769-L36ERMS is a modular controller that requires installation on a DIN rail or direct panel mounting. It must be positioned within four modules of the power supply to ensure proper performance

. To form a complete control system, users can add up to 30 local 1769 series I/O modules (digital, analog, specialty) to meet specific application needs

.

The controller's 4-channel combination analog module is integral to its design, providing both input and output functionality. This module offers:

• Voltage output range: 0 to 10.5V

• Current output range: 0 to 20mA

• Resolution: 14-bit

• Accuracy: ±0.5% (voltage), ±0.35% (current) at 25°C

• Protection: Short-circuit and over-voltage protection

Software and Programming

The controller is programmed using Rockwell Automation's Studio 5000 Logix Designer integrated development environment (version 21 or higher for firmware version 21 or higher)

. This software supports multiple programming languages per the IEC 61131-3 standard, including:

• Ladder Logic (LAD)

• Structured Text (ST)

• Function Block Diagram (FBD)

• Sequential Function Chart (SFC)

The controller's operating system is flash-upgradeable, allowing users to easily update firmware for new features and improvements. The software also supports online editing, enabling modifications to the program while the controller is running, which minimizes downtime during commissioning and troubleshooting.

Applications

The 1769-L36ERMS is suited for a diverse array of industrial automation applications, including:

• Automotive Manufacturing: Controlling robotic welding arms, assembly lines, and precision material handling systems, where its motion control capabilities ensure high accuracy (e.g., ±0.05mm in welding applications)

• .

• Food and Beverage Processing: Managing packaging equipment capable of high speeds (e.g., 1,200 packages per minute) and ensuring consistent quality control

• .

• Packaging Machinery: Coordinating fillers, cappers, labelers, and wrappers with precise timing and coordination

• .

• Water and Wastewater Treatment: Automating pumps, valves, and filters in treatment plants, leveraging its analog I/O for process variable monitoring and control.

• Material Handling and Logistics: Controlling conveyor systems, sortation equipment, and automated guided vehicles (AGVs) in distribution centers

• .

Its built-in communication features, particularly EtherNet/IP, make it an excellent choice for applications requiring integration into larger Industrial Internet of Things (IIoT) or Industry 4.0 architectures.

Comparison and Considerations

The 1769-L36ERMS is a variant within the CompactLogix 5370 series, often compared to the 1769-L36ERM. Key differentiators include the integrated safety memory and specific analog I/O capabilities of the L36ERMS model. For applications requiring functional safety and precise analog control, the L36ERMS offers distinct advantages.

When selecting a controller, it is important to consider:

• Memory Requirements: The 3MB user memory and 1.5MB safety memory are sufficient for many applications, but very large projects might require higher-end controllers.

• I/O Needs: The ability to expand to 30 modules and 960 points provides significant flexibility.

• Motion Control: The integrated support for 16 axes is a key benefit for machinery requiring coordinated motion.

• Environmental Conditions: The operating temperature and humidity ranges make it suitable for most industrial environments, but extreme conditions might require additional protection.

Conclusion

The Allen-Bradley 1769-L36ERMS CompactLogix controller is a powerful, versatile, and scalable automation solution designed for demanding industrial applications. Its combination of substantial processing power, extensive I/O capabilities (including integrated analog functionality), integrated motion control, and robust communication options makes it a reliable choice for engineers and machine builders.

As part of Rockwell Automation's integrated architecture, it provides seamless connectivity with a comprehensive suite of I/O, networking, and software tools, enabling the development of efficient and future-proof automation systems. Whether deployed in automotive manufacturing, food processing, or water treatment, the 1769-L36ERMS delivers the performance, flexibility, and reliability needed to optimize industrial processes and enhance productivity.