ABB 1MRK002239-BBr04 Power Supply Module

The ABB 1MRK002239-BBr04, also cataloged as the 1MRK002239 Power Supply Module, operates as a dedicated hardware component for auxiliary DC power conversion and distribution within ABB Relion protection and automation systems.

Hardware Specifications

Backplane Bus Communication Velocity and Firmware Flash Compatibility

• Backplane Bus Communication Velocity: Delivers direct, low-ripple 24 VDC bus power to adjacent protection relays and communication modules, preventing logic supply dropouts during transient backplane communication bursts.
• I/O Density Scaling: Supplies centralized DC power across dense relay rack configurations, supporting multiple protection units up to the maximum 2.5 A threshold without external distribution blocks.
• Firmware Flash Compatibility: Maintains steady output voltage regulation during CPU boot sequences, local firmware flash updates, and diagnostic polling across connected Relion hardware.

Frequently Asked Questions

Q: Can the 1MRK002239-BBr04 power multiple secondary devices within the same chassis? A: Yes, it supplies a nominal 24 VDC output at 2.5 A typical, allowing it to power multiple ABB Relion relays or communication interfaces provided the combined load remains within the rated current limits.

Q: What mounting configurations are supported for physical deployment? A: The module supports direct installation on standard 35 mm DIN rails as well as integrated mounting within ABB protection relay racks.

Q: How does the unit perform under zero-load conditions? A: The internal switching circuitry operates with high efficiency (> 90%), drawing minimal standby power rated at <= 5 W when no external load is attached.

Field Installation Guidelines

• Mount the module vertically on a standard 35 mm DIN rail or within a dedicated relay rack frame, maintaining clear top and bottom ventilation paths to facilitate natural thermal convection across the -25 to +70 deg C operating range.
• Ensure incoming primary DC power cabling within the 90 to 250 VDC range is connected using correctly sized wire gauges and terminated securely at the power input terminals.
• Verify output polarity prior to energizing 24 VDC bus lines connected to sensitive protection and communication modules.
• Connect the module frame ground terminal directly to the enclosure's main protective earth (PE) bus to comply with IP20 safety standards and mitigate electromagnetic interference.