The Allen-Bradley 1769-L36ERM, also cataloged as the 1769-L36ERM PLC Processor, operates as a dedicated hardware component for multi-discipline logic and motion control within CompactLogix 5370 platforms.

Model Specification

The 1769-L36ERM is a controller module integrated with 3 MB of user memory and dual Ethernet/IP ports. It is engineered to facilitate deterministic task execution, supporting up to 16 axes of motion control via CIP Sync and EtherNet/IP networks.

Hardware Specifications

Deterministic Network Connectivity

This controller utilizes EtherNet/IP deterministic networks to manage real-time data exchange across distributed I/O and motion axes. The implementation of Device Level Ring (DLR) technology ensures network fault tolerance by providing redundant communication paths. Backplane bus communication velocity is optimized for rapid local I/O update rates, supporting up to 30 local 1769 modules. Firmware flash compatibility is maintained to ensure alignment with standard ControlLogix and CompactLogix system environment requirements.

Ordering Info

• 1769-L36ERM CompactLogix Controller

• Protective battery cover

• Documentation package

• Note: Secure Digital (SD) card for non-volatile storage must be ordered separately

Field Installation Guidelines

• Mounting: Install the controller on a standard DIN-rail or directly on a panel; maintain adequate clearance for air circulation as per the thermal management specifications.

• Grounding: Connect the module chassis to a low-impedance ground point to minimize the impact of electromagnetic interference (EMI) on communication ports.

• Wiring: Route Ethernet cabling away from high-voltage AC power lines to prevent signal coupling; utilize shielded twisted-pair (STP) cabling for industrial environments.

• Power Supply: Ensure the 24 VDC supply voltage remains within the nominal range; utilize a dedicated SELV/PELV power supply to maintain electrical isolation.

Frequently Asked Questions

• Does the module support hot-swapping?

  The controller is not hot-swappable; power must be removed from the controller and the local backplane before insertion or removal of the module to prevent electrical damage.

• What is the purpose of the dual Ethernet ports?

  The dual ports support linear, star, and DLR network topologies, allowing for integrated network diagnostics and redundant communication path support.

• Can the user memory be expanded?

  The 3 MB of internal user memory is fixed; however, non-volatile data storage and program backup are supported via removable Secure Digital (SD) cards.

• What is the maximum number of local I/O modules?

  The controller supports up to 30 local 1769 Compact I/O modules across a maximum of 3 expansion banks.

• How are firmware updates applied?

  Firmware is updated via the USB programming port using the ControlFlash software utility; do not interrupt power during the update process.

• Does the controller support safety-rated I/O?

  The 1769-L36ERM supports communication with Safety I/O modules via EtherNet/IP; confirm specific safety system requirements in the project documentation.

• What indicates a network fault?

  The "NET" LED on the front panel indicates the status of the Ethernet/IP connection; a flashing red light typically signifies an IP address conflict or network failure.

• Is the controller compatible with legacy 1769-ADN adapters?

  The controller manages local 1769 I/O; compatibility with remote I/O via legacy adapters requires verification of specific network configuration parameters.