ABB DSSR122 4899001-NK power supply and voltage regulator unit

Description

Real-World Use & Application Scenarios

Power reliability and precise voltage regulation are critical across many industrial automation environments. The ABB DSSR122 4899001-NK power supply unit is widely used in industrial automation systems where robust DC-input and DC-output power conversion is essential. This model supports stable control in process industries such as oil and gas, manufacturing, chemical processing, and energy generation. These sectors demand continuous, uninterrupted power to control systems to avoid costly downtime and ensure safety. The ABB DSSR122 4899001-NK excels in providing regulated 5 V DC output from a 24 V DC input, making it fundamental in control racks and I/O subracks where consistent voltage output directly impacts instrument accuracy and equipment longevity.

Because control systems operate in harsh environments with fluctuating power conditions, the ABB DSSR122 4899001-NK delivers dependable electrical performance while maintaining protection against overvoltage and current surges. This makes it a trusted choice for engineers implementing complex control architectures requiring power stability for PLCs, DCS, and instrumentation interfaces. Its use in industrial automation extends to critical control panels, ensuring control logic, sensors, and actuators receive precise power, which drives operational reliability and safety compliance.

Product Introduction & Positioning

The ABB DSSR122 4899001-NK is a power supply and voltage regulator unit specifically designed for DC-input/DC-output applications within ABB’s Advant OCS platform and compatible industrial control systems. Positioned as a vital component, it converts 24 V DC input power down to a stable 5 V DC output, delivering up to 40 amps of regulated current. This functionality is essential in distributed control systems, where it ensures proper power conditioning to sensitive electronic modules and I/O racks.

As part of ABB’s broader control system architecture, this unit is mounted on the rear of I/O subracks, directly supporting signal and logic interface modules. The ABB DSSR122 4899001-NK integrates seamlessly into existing ABB process control platforms, offering engineers a reliable solution to power supply challenges. Its role extends beyond basic power provision; it enhances system stability by limiting current, protecting against voltage spikes, and sustaining operations during input voltage drops. Embedded engineers and system integrators value this unit for its ability to underpin control system reliability, ensuring smooth and accurate process execution.

Key Technical Features & Functional Benefits

The ABB DSSR122 4899001-NK stands out due to its exceptional electrical performance and built-in protective features. It maintains a constant power draw even when input voltage falls to approximately 14 V, effectively stabilizing output under fluctuating supply conditions. The power supply includes protective mechanisms such as a miniature 10 A fuse and overvoltage protection, preventing damage to both itself and the connected control components. This feature set supports long-term operational safety and minimizes unexpected system failures.

Physically, the unit is compact and robust, measuring 238.5 mm by 72 mm by 162 mm, and weighing just 2.35 kg. Its mounting design is optimized for secure attachment to I/O subracks, facilitating straightforward installation in control cabinets without occupying excessive space. The hardware is engineered to endure industrial environments, offering mechanical stability critical to vibration-prone installations.

Compatibility is broad within ABB’s systems, particularly suited for the Advant OCS series and compatible with controllers like the Advant Controller 410 and 450 models. This ensures smooth integration and communication within the established control system ecosystem. The galvanic connection between input and output facilitates reliable current supply and helps eliminate electrical noise. Long-term reliability is assured by efficient thermal management and quality components, which extend the service life of the power supply even in continuous operation scenarios.

Detailed Technical Specifications

Related Modules or Compatible Units

ABB DSSR170 48990001-PC – Another power supply unit from ABB offering DC input conversion for different applications.
ABB DSTD108 57160001-ABD – Connection unit compatible with ABB control racks where DSSR122 is installed.
ABB 3BSE016025R1 – AC410B12 system unit designed for integration with power supplies like DSSR122.
ABB 3BSE019974R1 – AC410B16 system unit with basic software suite complementing the DSSR122 power system.
ABB DSRF197K01 – I/O subrack featuring a single 5 V kit compatible with the DSSR122 output supply.
ABB PM10YAC410-DSSR122 – Preventive maintenance kit designed specifically for the DSSR122 for extended life and system health.
ABB SD833 3BSC610066R1 – Power supply unit available in ABB’s product range designed for similar DC-input scenarios.
ABB SB821 3BSE018109R1 – Battery unit integrable with power supply modules like DSSR122 in redundant or backup power systems.

Installation Notes & Maintenance Best Practices

Before installing the ABB DSSR122 4899001-NK, assess the control cabinet size and ensure sufficient clearance for rear mounting on the I/O subrack and adequate ventilation to prevent overheating. Proper grounding is critical to avoid electrical noise and potential damage. Confirm the power feed is a stable 24 V DC source and use only the specified miniature 10 A fuse for input protection. Cable routing should preserve signal integrity and avoid interference, particularly where sensitive control signals and power cabling coexist.

Maintenance routines focus on periodic visual inspections to check fuse integrity and signs of physical wear or overheating. Diagnostic checks include monitoring output voltage stability and any abnormal current fluctuations to preempt power supply degradation. Firmware updates are generally not applicable, but ensure any accompanying system software is up-to-date for optimal system communication. Keeping spare fuses and preventive maintenance kits on hand helps minimize downtime and extends system reliability.