Description

The 1756-M13 is a high-capacity volatile RAM expansion daughterboard engineered specifically for the Allen-Bradley ControlLogix 5555 processing platform. This internal hardware component expands the physical memory capacity of the host processor, providing 1.5 Megabytes of additional volatile space for complex control logic, data arrays, system trend files, and industrial automation routines. It is designed to support legacy automation setups, including distributed plant networks and high-speed assembly lines, by eliminating programmatic storage constraints without requiring a controller upgrade.

Features

• Provides 1.5 MB of additional volatile RAM for ControlLogix 5555 processors.
• Supports external battery backup via the host controller to maintain data integrity during power loss.
• Integrated front-facing OK LED for real-time hardware status and diagnostic monitoring.
• Robust design with high ESD immunity and shock resistance for industrial environments.
• Direct internal mounting into the dedicated processor memory slot.

Applications

This module is intended for use in ControlLogix 5555 series PLC systems where additional memory is required for large-scale logic, extensive data logging, or complex industrial control algorithms. It is suitable for maintenance and expansion of existing legacy ControlLogix installations.

Technical Specifications

Installation Guidelines

• Ensure the host controller is powered down before attempting to install or remove the memory module.
• Handle the module by the edges to prevent electrostatic discharge (ESD) damage to sensitive components.
• Insert the module firmly into the dedicated internal memory slot of the 5555 processor until it is fully seated.
• Verify that the host controller is equipped with a functional battery backup to ensure data retention during power cycles.
• After installation, perform a power-up test and confirm the OK LED status indicator is illuminated to verify proper module recognition.

FAQ

Is the 1756-M13 compatible with newer ControlLogix controllers?
No, this module is specifically designed for the legacy ControlLogix 5555 series processors and is not compatible with later generations of ControlLogix controllers.

Does this module retain data without power?
As a volatile RAM module, it requires an external battery backup connected to the host controller to preserve data during power loss. Ensure your battery is replaced periodically according to your maintenance schedule.