ABB 1MRK002239-BA Power Supply Module

The ABB 1MRK002239-BA, also cataloged as the PSM*DC 90-250V Power Supply Module, operates as a dedicated hardware component for localized DC power conversion, regulation, and sub-assembly distribution within ABB 500-series protective relay and substation automation platforms.

Hardware Specifications

Industrial Control and Backplane Bus Communications

• Backplane Bus Communication Velocity: The power supply assembly interfaces directly with the primary chassis motherboard, delivering regulated internal rail voltages to adjacent logic and sampling cards. This close physical connection ensures stable voltage tracking, allowing internal data transceivers to maintain constant backplane bus synchronization without interruption from external input voltage dips.
• I/O Density Scaling: The module is designed to support the electrical demands of dense multi-channel protective relay configurations. It regulates secondary internal DC voltage lines concurrently, matching dynamic current drawing adjustments as input/output cards cycle during active line fault evaluations.
• Firmware Flash Compatibility: Internal protection circuitry continuously monitors power conversion metrics. When deployed within RET5xx, RED5xx, or RES5xx architectures, the physical module configuration must be aligned with the controller’s core hardware baseline to avoid internal power-up registration faults.

Frequently Asked Questions

Q: Why is a new backplane plate and stud mandatory when using the 1MRK002239-BA to replace a legacy 1MRK000179-XX module?

A: The 1MRK002239-BA incorporates a redesigned physical chassis layout and grounding path compared to the legacy 1MRK000179-XX variant. The new backplane plate and grounding stud provide the exact alignment needed for structural coupling and establish a low-impedance connection to the main frame earth to handle surge transients safely.

Q: What are the engineering consequences to the 500-series relay if the input VDC drifts outside the 90 - 250 VDC window?

A: The module contains dedicated overvoltage and undervoltage shutdown thresholds. If the supply voltage drifts below 90 VDC or surges past 250 VDC, the internal switching regulators will trip, shutting down power to the internal logic and processing components to safeguard memory registers from corrupted state execution.