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

The B/M-60002-3 is a rack-mounted dynamic memory board manufactured by Reliance Electric, now a member of Rockwell Automation. It is a dedicated memory expansion module engineered exclusively for legacy AutoMax and PMI PLC and motion control systems. This component expands the internal memory of the main controller to accommodate larger control programs, operational data and system configuration files, and it is an essential spare part for the maintenance, repair and upgrade of existing legacy Reliance automation equipment.

Designed for direct insertion into the standard backplane slots of AutoMax and PMI racks, the B/M-60002-3 uses dynamic random-access memory to deliver high-speed volatile data storage. It works in coordination with the main controller to store user application programs, I/O parameter settings, real-time operational data and system diagnostic records. With a compact standard card form factor, the module features solid industrial construction and reliable circuit design to maintain stable performance under long-duration continuous operation. It adopts mature electronic technology and basic status indication circuits, enabling normal data reading and writing functions in typical factory environments. Since the original production has been stopped, this memory board is only available through new surplus stock, professionally refurbished and fully tested used units in the aftermarket.

The official part number is B/M-60002-3, which is also abbreviated as BM-60002-3 in industrial part catalogs. The manufacturer is Reliance Electric under Rockwell Automation. This product is defined as a dynamic memory expansion board, fully compatible with Reliance AutoMax and PMI PLC and motion control platforms. It functions to expand program storage and data storage space for the controller. The module follows the standard rack-mount form factor of the series, supporting direct plug-and-play installation on the system backplane. The operating temperature ranges from 0°C to 55°C, adapting to conventional industrial workshop ambient conditions. The overall weight is approximately 0.55 kilograms. This product is confirmed obsolete and discontinued by the original equipment manufacturer.

The memory expansion capability effectively solves the insufficient storage problem of the original controller, allowing the system to run more complex control logic and multi-task programs. The standard rack-mounted structure supports quick installation, removal and replacement, which greatly shortens equipment maintenance time and reduces unplanned production downtime. Industrial-grade electronic components are adopted throughout the board, delivering strong resistance to vibration, temperature changes and common electrical interference in industrial sites, and ensuring long-term operational reliability. As a genuine OEM matching part, it maintains full compatibility with the original system, so users can complete system repair and memory upgrade at a lower cost instead of replacing the entire control system. The high-speed read and write performance of dynamic memory guarantees the fast execution of control instructions and real-time processing of field data, keeping the whole automation system operating efficiently.

The B/M-60002-3 dynamic memory board is widely deployed in industrial automation facilities equipped with Reliance AutoMax and PMI control systems. It is commonly used on automated manufacturing production lines to support large-scale PLC control programs and mass data collection. In multi-axis motion control equipment, it provides sufficient storage space for motion parameters and positioning data to ensure accurate operation of servo and positioning systems. It also serves process industries including pulp and paper, textile machinery and chemical production lines to assist stable operation of process control systems. Moreover, it is the standard replacement part for daily maintenance, fault repair and performance upgrade of all legacy Reliance PLC and motion control installations.

Original production of the B/M-60002-3 has been permanently discontinued by Reliance Electric and Rockwell Automation, and it is classified as a legacy obsolete component. Currently, professional industrial automation distributors provide this product in three main states: new old stock, professionally refurbished units and fully tested used units. The quantity of new surplus products is limited in the market, while refurbished and used modules are the mainstream supply. Most authorized suppliers offer a standard twelve-month warranty for sold units. Before delivery, each module will go through a complete set of tests including memory integrity inspection, data read-write testing, backplane communication testing and aging testing, to make sure all performance indicators comply with the original factory technical standards.