Product Overview

The ABB DSSR122 (Part Number: 48990001-NK) serves as a high-capacity, regulated DC/DC power converter specifically engineered for the Advant Master control platform. This module converts standard 24V DC industrial power into a stabilized 5V DC supply, delivering up to 40A of continuous current to drive sensitive logic circuits, CPU modules, and I/O clusters. By isolating control electronics from input fluctuations, the DSSR122 prevents logic errors and hardware fatigue in mission-critical automation environments.

Technical Specifications

Engineering Advantages

• Hot-Swap Functionality: Operators replace modules without powering down the entire station. This feature eliminates downtime during maintenance cycles and ensures continuous process availability.

• Active Redundancy Support: The DSSR122 supports parallel operation. By configuring units in an N+1 setup, the system maintains full power even if a single supply fails, providing a fail-safe architecture for high-stakes utility and manufacturing sectors.

• Superior Thermal Management: Advanced internal heat sinking allows the unit to operate effectively up to +70°C. For maximum longevity, we recommend maintaining 20mm of clearance around the cooling vents to prevent localized heat buildup.

• Precision Regulation: The unit maintains a tight ±1% voltage tolerance. This precision protects sensitive 5V logic components from the "noise" and voltage drops common in large-scale industrial DC grids.

• Reverse Polarity Protection: Integrated circuitry prevents damage during installation if input wiring is accidentally swapped, safeguarding both the power supply and downstream controllers.

FAQs

Is this ABB DSSR122 unit brand new or refurbished?

We supply this unit as 100% Brand New and Original. While the market often carries refurbished units due to the legacy nature of some Advant systems, our stock consists of unused, factory-certified hardware to ensure maximum MTBF (Mean Time Between Failures).

Can the DSSR122 be used with non-ABB PLC systems?

Yes. While optimized for ABB Advant Master, the DSSR122 functions as a standalone high-current 5V DC regulator. As long as your third-party hardware requires a 5V supply and fits within the 40A current envelope, this module provides highly stable power.

What should I do if the "Thermal Warning" LED activates?

Check for obstructions in the ventilation paths or an ambient temperature exceeding 70°C. The unit features self-resetting protection, but prolonged exposure to overheat conditions will trigger a shutdown to protect internal components. Ensure the cabinet fans are operational.

Which fuse should I use for replacement?

Use only the ABB-certified 20A (5672827-20) spare fuse. Using non-certified or incorrectly rated fuses voids compliance and risks damaging the internal regulation circuitry during a surge.