B/M-60002-3 Reliance Electric Dynamic Memory Board

The B/M-60002-3 is a high-density dynamic memory board designed and manufactured by Reliance Electric (now part of Rockwell Automation) for legacy AutoMax and PMI PLC and motion control systems. As a critical expansion component, it provides volatile DRAM storage to extend program and data memory capacity for industrial controllers, ensuring reliable operation of complex automation and motion control applications. It remains a vital spare part for maintaining and upgrading existing Reliance legacy installations.

The B/M-60002-3 functions as a dedicated memory expansion module that plugs into dedicated memory slots on Reliance AutoMax and PMI system backplanes. It utilizes dynamic random-access memory (DRAM) to offer high-speed volatile storage, which requires periodic refreshing to retain data while balancing performance and cost. The module stores user programs, data tables, system configuration parameters, and diagnostic logs, directly enhancing the controller’s ability to handle large-scale automation logic and motion control algorithms. Built with industrial-grade components, it features a standard rack-mounted form factor for easy integration and replacement, with robust construction to withstand harsh industrial environments.

The part number is B/M-60002-3, also referenced as BM-60002-3 or 60002-3 in industrial listings. The manufacturer is Reliance Electric under Rockwell Automation. It is categorized as a dynamic memory board (DRAM expansion module) compatible with Reliance AutoMax and PMI PLC/motion control systems. It provides volatile storage for user programs, data tables, I/O configuration, and diagnostic information. The module adopts a standard rack-mount design for direct installation into system backplane slots. The operating temperature range is 0°C to +55°C, suitable for general industrial workshop conditions. The weight is approximately 0.55 kilograms, with dimensions matching Reliance standard module form factors. The product status is obsolete and discontinued by the original manufacturer.

This module offers high-speed DRAM expansion, significantly increasing the controller’s memory capacity to support larger user programs and more complex data structures, eliminating memory bottlenecks in advanced automation applications. Its plug-and-play rack-mounted design enables quick installation and replacement without complex wiring, reducing system maintenance downtime. Built with industrial-grade electronic components, it delivers stable performance under vibration, temperature fluctuations, and continuous operation in demanding factory environments. As a direct OEM replacement, it perfectly matches original system memory parameters, allowing users to upgrade or repair aging PLC systems at a lower cost than full system replacement. The volatile DRAM technology provides fast read/write access, optimizing the execution speed of control logic and motion control commands.

The B/M-60002-3 memory board is primarily used in industrial automation systems equipped with Reliance AutoMax and PMI PLC/motion control platforms. It is widely applied in complex manufacturing production lines requiring large program storage and high-speed data processing. It serves motion control systems for servo motors and multi-axis positioning equipment, supporting sophisticated motion algorithms and real-time data logging. In process industries such as pulp and paper, textile, and chemical processing, it enhances controller performance for coordinated automation and process monitoring. Additionally, it is the preferred replacement component for maintenance, memory upgrades, and retrofit of legacy Reliance PLC and motion control installations.

Original production of the B/M-60002-3 has been completely discontinued by Reliance Electric and Rockwell Automation, classified as a legacy obsolete component. Currently, it is supplied by professional industrial automation distributors in three main conditions: new old stock, professionally refurbished units, and fully tested used units. New surplus stock is limited in the market, while refurbished and used units are more readily available. Authorized suppliers typically provide a standard twelve-month warranty for refurbished and used modules. Every unit undergoes comprehensive testing, including memory integrity checks, data retention tests, backplane communication tests, and aging tests, to ensure all performance metrics meet original factory specifications。