ABB DSSR122 48990001‑NK Rack Power Supply Unit

Technical Specifications

Model: DSSR122

Part Number: 48990001‑NK

Brand: ABB

Product Type: Rack regulator power supply unit

Matching System: ABB Advant OCS, Advant Controller 450 System

Input Voltage: 24 VDC

Output: Regulated 5 VDC, 40 A

Spare Fuse: 20A, 5672827‑20

Installation: Subrack slot mounting, hot‑swap supported

Operating Temperature: ‑20℃ ~ +60℃, non‑condensing

Protection Class: IP20

Weight: 2.35kg

Dimension: 162mm ×72mm ×238.5mm

Compatible System: Power plant, chemical, papermaking legacy Advant OCS control cabinet

Core Function: Dedicated rack power regulator unit for Advant Controller450 system. It converts 24VDC input into stable 5VDC large‑current power supply, supplies power for controller CPU, communication boards and various I/O boards inside the subrack, built‑in over‑voltage, over‑current and short‑circuit protection to guarantee stable power supply for the whole controller rack.

Product Details

The DSSR122 48990001‑NK is rack DC‑DC regulator power supply unit for ABB Advant OCS Advant Controller450 control system.

This power unit is installed in the main controller subrack, adopts DC‑DC conversion architecture. It takes 24 VDC as input and outputs stabilized 5 VDC‑40A power for all internal modules of the rack, including processor boards, communication interface boards and I/O boards. It supports hot‑swap replacement, the power supply can be replaced online without shutting down the whole controller system, reducing system downtime during maintenance.

Built‑complete protection functions including over‑voltage, over‑current and short‑circuit protection. Front‑panel LED indicators display power status and fault alarm information for fast field diagnosis. Equipped with replaceable 20A backup fuse for convenient on‑site maintenance. Conformal coated circuit board improves anti‑interference and moisture‑proof performance, adapts to complex industrial workshop environment.

It belongs to legacy Advant OCS hardware, mainly used for spare‑part replacement and overhaul of old‑generation Controller450 racks, not suitable for new‑project constructionABB Group.

It is important spare hardware for controller rack power loop debugging and defective DSSR122 power unit replacement.