Product Introduction

The ABB DSSR122, part number 48990001-NK, is a rack-mounted DC-DC power supply unit for ABB Advant OCS and MasterPiece legacy distributed control systems. It converts 24VDC input into stable 5VDC high-current output to supply power for backplane and rack modules. With heavy-duty metal housing and comprehensive circuit protection, the unit can deliver continuous stable power under harsh industrial environments with temperature variation, dust, vibration and electromagnetic interference. This model is end-of-life from original manufacturer and mainly used for maintenance replacement of old control racks. Widely applied in power generation, pulp & paper, petrochemical and metallurgical industries. It is a critical spare part for Advant DCS cabinet maintenance and power unit replacement.

Content Details

Brand: ABB Model: DSSR122 Part No: 48990001-NK Product Type: DC-DC Power Supply Unit Applicable System: ABB Advant OCS, MasterPiece DCS Input: 18~30VDC, nominal 24VDC Output: 5VDC, 40A The ABB DSSR122 48990001-NK is installed inside Advant control cabinet. It serves as the main rack power converter, providing 5V power to processor, communication and I/O boards on the backplane. It monitors input voltage, output current and internal temperature in real time. Built-in multiple protection functions include overvoltage, overcurrent, short-circuit and overtemperature protection to prevent damage to downstream DCS modules. Every unit undergoes full functional testing and aging screening before shipment to ensure reliable 24/7 continuous operation. Internal filtering circuits suppress voltage ripple and electrical noise. LED indicators on the front panel display power status, output normal and fault alarms, helping maintenance engineers quickly locate power supply failures and shorten plant downtime. Typical application scenarios include thermal and hydro power plant DCS control, paper mill automation, chemical continuous process monitoring and metallurgical control system. When the original rack power supply fails, DSSR122 48990001-NK can be directly replaced to restore the whole Advant DCS rack power supply. This power unit complies with IEC industrial safety and EMC standards with IP20 protection rating. Robust metal casing and durable power components support long-term stable operation. Whether you prepare spare inventory for equipment overhaul or purchase components for legacy DCS retrofit projects, the ABB DSSR122 power supply unit provides dependable rack power for your Advant automation system.

Tags: DSSR122 48990001-NK ABB DCS power supply

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