1. Product Overview
The ABB DSSR122 48990001-NK is a dedicated industrial-grade power supply module developed by ABB, belonging to the classic DSSR series power product line. It is natively designed for ABB Advant OCS, MasterPiece 200 and 800xA distributed control system platforms, and serves as the core stable power source for Advant Controller 410/450 series controllers and S100 I/O racks. It is widely deployed in petrochemical, thermal power generation, metallurgy and other continuous process industrial scenarios, and is one of the most in-demand spare parts for maintaining the long-term stable operation of legacy ABB DCS systems.
2. Core Technical Specifications
- Manufacturer: ABB
- Official Part Number: DSSR122 48990001-NK (alternate marking: 4899001-NK)
- Product Type: Industrial Control System Rack Power Supply Unit
- Rated Input Voltage: 115/230 VAC (auto-switching), 50/60 Hz
- Output Voltage: 24 VDC, 5 VDC dual-channel regulated output
- Maximum Output Power: 120 W
- Overvoltage Protection Threshold: 28 VDC
- Overcurrent Protection: Built-in electronic fuse, automatic current limiting
- Operating Temperature Range: 0 °C to +60 °C
- Relative Humidity: 5% – 95% non-condensing
- Shock Resistance: 10g peak, 11 ms half-sine pulse
- Vibration Resistance: 1 mm peak-to-peak (2–13.2 Hz); 0.5g (13.2–150 Hz)
- Mounting Form: Standard ABB DCS rack slot installation, hot-swap supported
- Net Weight: Approximately 11 kg
- Dimensions: 200 mm × 150 mm × 160 mm
- Warranty: 12 months standard for new units
3. Key Features & Advantages
- Ultra-High Output Stability: The dual-channel independent regulated output design ensures that the 24 VDC and 5 VDC power rails of the DCS system maintain extremely low voltage fluctuation even under sudden load changes, providing a highly reliable power foundation for the controller and I/O modules.
- Full-Range Protection Mechanism: It integrates overvoltage, overcurrent, short circuit and over-temperature multi-layer protection functions, which can quickly cut off the output when an abnormal fault occurs, effectively avoiding the damage of subsequent control hardware caused by power anomalies.
- Excellent Industrial Environmental Adaptability: The conformal coated PCB design and wide operating temperature range allow it to operate stably for a long time in harsh industrial environments with high dust, high humidity and strong electromagnetic interference.
- Native System Seamless Compatibility: It is natively matched with ABB Advant OCS, MasterPiece 200 and 800xA DCS platforms, no additional configuration or modification is required after installation, and it can directly supply power for Advant Controller 410/450 and S100 I/O racks.
- Hot-Swap High-Availability Design: The module supports live insertion and removal during system runtime, allowing maintenance teams to replace faulty units without shutting down the DCS system, drastically reducing planned maintenance downtime.
4. Typical Applications & Real-World Value
This dedicated power supply module is a mission-critical spare part for facilities operating legacy ABB DCS systems, delivering tangible operational and economic benefits.
- In large petrochemical plant Advant OCS distributed control systems, it provides stable and uninterrupted power support for the entire control rack, ensuring that the core control logic of the production process will not be interrupted due to power anomalies.
- In thermal power plant 800xA DCS control room scenarios, the module’s strong anti-interference performance ensures that it can operate stably in high-electromagnetic-interference power plant electrical rooms, avoiding system crashes caused by power supply anomalies.
- For operation and maintenance teams managing existing ABB DCS systems, the module is fully backward compatible with the original system architecture, allowing users to replace faulty units without modifying the existing control system, extending the service life of the legacy DCS system at a very low hardware investment.
- In metallurgical plant rolling mill distributed control systems, the module’s excellent vibration resistance ensures that the power supply will not malfunction in the strong vibration environment of the rolling mill, effectively protecting the continuous and stable operation of the rolling mill control system.
