Honeywell Enraf 2558990-2 ARM 1 Backplane MSC Card for MSC-800 Motion Control Systems

Product Overview

The Honeywell Enraf 2558990-2 is an ARM 1 Backplane MSC Card associated with the MSC-800 motion control architecture. The part is identified within available equipment documentation and industrial component records as an MSC backplane circuit board, rather than as a standalone power supply. Its primary significance is therefore related to controller hardware integration and the internal interconnection structure of the MSC system.

The MSC-800 platform originates from Industrial Indexing Systems motion control technology and is designed around a modular controller architecture. Documentation for the MSC family identifies the MSC-800 as a supported controller within the motion control environment and describes controller functions associated with servo operation, drive enable functions, and programmed motion. This makes the backplane hardware an important part of the physical controller structure in which processor, interface, and motion-control elements operate together.

The 2558990-2 designation is particularly useful when identifying replacement or maintenance components because several related identifiers may appear on documentation or hardware records. Associated references include STM-5, MOT130, and E19130013. These identifiers can help technicians compare equipment markings and establish whether a particular circuit board corresponds to the required MSC system configuration.

ARM 1 Backplane Function

A backplane is a fundamental part of a modular electronic control system. Instead of performing the complete control function by itself, the backplane provides the physical and electrical interconnection between compatible circuit boards or controller assemblies. In an MSC controller architecture, this type of board supports the organized connection of system components within the controller chassis.

For the Honeywell Enraf 2558990-2, the ARM 1 Backplane designation indicates that the board belongs to this internal controller interconnection architecture. Its importance is therefore not measured only by the individual electronic components mounted on the board, but by its compatibility with the associated MSC hardware and system configuration.

Correct identification is essential when replacing an MSC backplane because a visually similar circuit board may not provide the same electrical interfaces, mechanical arrangement, or system compatibility. The complete part number, board markings, revision information, and associated controller configuration should be considered together during maintenance.

Relationship with the MSC-800 Controller

The MSC-800 is part of the Industrial Indexing Systems family of motion controllers. Available controller documentation shows that MSC-800 systems can work with multiple controller identifiers and that programmed functions can address individual controllers within the system. The documentation also describes drive-related operations, including enabling the servo amplifier and resetting motor fault conditions before motion instructions are executed.

This architecture reflects the modular nature of industrial motion control. Controller electronics, servo-related hardware, interfaces, and supporting circuit boards must operate as an integrated system. The backplane provides the infrastructure that allows the appropriate boards to communicate and remain mechanically organized within the controller assembly.

Consequently, the Honeywell Enraf 2558990-2 should be considered a system-level hardware component rather than a generic power conversion device. When researching this part number, searching by the complete designation together with terms such as ARM 1 Backplane, MSC Card, STM-5, MOT130, and MSC-800 can provide more accurate identification results.

Technical Identification

Application in Industrial Motion Control

The MSC-800 controller architecture is intended for industrial motion-control applications where programmed movement and servo-related operations must be coordinated through a dedicated control platform. The controller documentation describes functions for enabling drives, managing controller states, and executing motion instructions. Such functions require dependable communication between the control electronics and the associated hardware within the controller assembly.

The 2558990-2 backplane is consequently relevant to maintenance of legacy MSC-based equipment. When a controller experiences an internal hardware fault, intermittent communication, abnormal initialization, or a board-level connection problem, the backplane should be considered as part of the overall hardware path rather than focusing only on the processor or motion-control card.

In industrial environments, maintaining the correct hardware revision is especially important. Controller systems may contain several boards with similar physical dimensions, while their electrical assignments and supported configurations can differ. For this reason, technicians should compare the exact 2558990-2 part number and all visible board markings before installing a replacement component.

Identification and Maintenance Considerations

Before servicing an MSC-800 controller, the equipment should be isolated according to the applicable plant safety procedures. The board should be identified using its complete part number rather than relying only on its general appearance. Labels, revision numbers, connector positions, board markings, and associated system documentation should be checked together.

Special attention should also be given to the relationship between the backplane and the other controller boards. A fault attributed to a controller card may sometimes involve an interconnection, connector, backplane contact, or system-level hardware issue. Proper diagnostic procedures should therefore evaluate the complete controller assembly.

When documenting an existing installation, recording the part number 2558990-2 together with the associated identifiers STM-5, MOT130, and E19130013 can improve future component identification. This information is particularly useful for legacy equipment where the original system documentation may be incomplete.

Conclusion

Honeywell Enraf 2558990-2 is an ARM 1 Backplane MSC Card associated with the MSC-800 motion control platform. Its role is related to the internal hardware interconnection of the MSC controller architecture rather than functioning as a standalone power supply. The associated STM-5, MOT130, E19130013, and 0395601 Rev. 04 identifiers provide additional references for technical identification.

For maintenance and component selection, the complete part number should be matched with the installed MSC system configuration and board revision. Understanding the relationship between the 2558990-2 backplane and the broader MSC-800 controller architecture helps engineers and maintenance personnel identify the correct hardware and avoid confusion with other MSC circuit boards or power-related components.