48990001-NK ABB Analog output module

Description

48990001-NK ABB Analog output module

Product Dimensions：

Product Description

The ABB 48990001-NK (DSSR 122) is an industrial-grade DC-to-DC power supply regulator module designed for ABB’s legacy MasterPiece / Advant DCS automation control racks.

It converts a 24V DC input voltage into a highly regulated, high-current 5V DC output (up to 40 Amps). This unit supplies stable logic power directly to central processing units (CPUs), communication boards, and I/O bus interfaces installed within the controller subrack.

Product Parameters

Product Advantages

• High Output Capability: Provides up to 40 Amps of clean 5V DC power to support complex racks with multiple CPU and I/O cards.
• Tight Voltage Regulation: Maintains stable 5V output even with minor variations or noise on the 24V DC field input line.
• Rack Integration: Designed specifically as a plug-in unit, eliminating external wiring clutter inside control cabinets.
• Built-in Overcurrent Protection: Uses internal fusing to shield downstream logic components from short circuits or over-voltage scenarios.

Important Considerations and Precautions

• Hot-Swapping Restrictions: Always power off the 24V DC main feed line before inserting or extracting the power module to prevent backplane arcing or logic disruption.
• Fuse Inspection: If the 5V DC output drops to zero while 24V DC input is present, check the internal 20A fuse (part 5672827-20). Replace only with an identical rating.
• Thermal Management & Airflow: Ensure the rack enclosure ventilation fans function properly; operating a high-current 40A supply under poor ventilation causes premature thermal aging.
• Electrolytic Capacitor Health: Since the DSSR 122 is part of legacy systems, inspect older or refurbished units for capacitor degradation prior to powering up critical process racks.

Product Applications

• Distributed Control Systems (DCS): Powering subrack backplanes in legacy ABB MasterPiece and Advant OCS installations.
• Process Automation Racks: Heavy industrial automation plants (pulp & paper, steel mills, power generation, marine machinery) running legacy ABB control hardware.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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