Overview
The ABB Baldor 0-51890-5 is a DPSF Phase Sequence Power Supply Card engineered for legacy industrial drive systems. This circuit board functions as a phase sequence monitoring module, delivering accurate three-phase voltage supervision to protect motor control circuits from phase loss and reversal conditions. Originally manufactured by Reliance Electric (now part of ABB), the 0-51890-5 is discontinued but remains in high demand for system repairs, upgrades, and legacy equipment maintenance across manufacturing, metals, and process industries.
Key Features
- Phase Sequence LED Indicator: Single dedicated LED for real-time phase sequence status monitoring and diagnostic verification.
- Direct Faceplate Integration: Silver-marked Reliance faceplate with three pre-drilled mounting holes; quick and secure installation.
- Compact Circuit Board: Printed grid coordinates for component reference and serviceability on top surface.
- Proven Legacy Design: Originally designed for DPSF power supply modules in Reliance Electric, ABB, and Baldor-Reliance servo drive cabinets.
- Discontinued Board—Hard-to-Find: Out of production; sourcing direct replacements is challenging in the secondary market.
Technical Specifications
- Part Number: 0-51890-5 (Also: 0518905)
- Functional Type: DPSF Phase Sequence Power Supply Card
- Manufacturer: Reliance Electric (ABB / Baldor-Reliance)
- Weight: 0.65 lbs
- Indicator: Phase Sequence LED (single)
- Mounting: Front faceplate with three screw holes
- Status: Discontinued by Manufacturer
- Typical Dimensions: ~7 x 10 x 2 inches
Typical Applications
The 0-51890-5 is commonly integrated into:
- Reliance Electric / ABB legacy servo drive systems and power cabinets.
- Baldor-Reliance DC and AC motor control circuits requiring phase sequence protection.
- Industrial automation equipment in metals processing, heavy manufacturing, and materials handling.
- System upgrades and repairs where OEM replacement cards are no longer available.
- Preventive maintenance and fault diagnosis in legacy drive installations.
Compatibility & Replacements
The ABB Baldor 0-51890-5 is a legacy board that may be interchangeable with other DPSF phase sequence cards within the same drive platform, though direct replacements are difficult to source. OEM supersession is not available; replacement typically requires sourcing verified used or reconditioned units from authorized secondary-market distributors. For system integration questions or compatibility verification, consult your drive documentation or contact a Reliance / ABB field service engineer. When procuring this board for repair, confirm voltage and logic specifications match your cabinet configuration.
