The ABB Bailey NPSI04 Power Supply Module is an essential component in the Bailey INFI 90 Distributed Control System (DCS), designed to deliver clean, stable, and isolated DC power to control system modules. As an enhancement over previous models like the NPSI03, the NPSI04 offers improved power capacity and efficiency, making it a reliable source of uninterrupted power for critical automation equipment.

Built with robust industrial-grade components and protection features, the NPSI04 ensures optimal performance and high system availability in demanding sectors such as power generation, petrochemical processing, water treatment, and industrial manufacturing. Its rack-mounted design allows for easy integration into existing INFI 90 chassis without modification, supporting both primary and redundant configurations.

Product Specifications

Product Applications

The ABB NPSI04 Power Supply Module is purpose-built for critical control environments and industrial systems requiring stable DC power for logic modules, I/O modules, and communication interfaces. Key application scenarios include:

• INFI 90 DCS Power Distribution

• Primary or Redundant Power Supply for Control Racks

• Power Generation Plants (coal, gas, nuclear, hydro)

• Oil Refineries and Chemical Processing Units

• Water and Wastewater Automation Systems

• Paper, Steel, and Cement Manufacturing Facilities

• Process Control Rooms with continuous operation demand

Its design ensures system stability during power disturbances and supports critical system redundancy to avoid unexpected shutdowns or data loss.

Product Advantages

• High Reliability: Engineered to operate 24/7 in mission-critical industrial systems.

• Improved Power Handling: Offers higher output capacity compared to older power module variants.

• Redundant-Ready: Can be deployed as part of a dual power setup for uninterrupted operation.

• Fault Protection: Includes multiple layers of protection for electrical and thermal events.

• Field Proven Compatibility: Fully tested with legacy and modern INFI 90 configurations.

• Plug-and-Play Installation: Easily slides into standard ABB racks without additional wiring.

• Diagnostic Visibility: LED indicators provide instant feedback on module performance.

• Low Maintenance: Minimal servicing required due to robust design and passive cooling.

FAQs

1. What does the NPSI04 module power within the DCS system?

   It supplies DC power to system CPUs, I/O modules, communication interfaces, and backplane logic.

2. Is the NPSI04 an upgrade to NPSI03?

   Yes, it offers improved output power, efficiency, and slightly enhanced thermal performance.

3. Can the NPSI04 be used in a redundant configuration?

   Yes, two NPSI04 units can be installed in parallel to ensure continuous power.

4. What happens in case of a short circuit?

   The module automatically enters protection mode and shuts down until the fault is cleared.

5. Does the module require external cooling?

   No, it is convection-cooled and does not rely on fans or active cooling systems.

6. How can I identify a failed or underperforming unit?

   Check the LED indicators on the front panel; abnormal behavior or absence of light may indicate failure.

7. What type of output does the NPSI04 provide?

   It delivers regulated DC output: +5 VDC and ±15 VDC to various DCS components.

8. Can the NPSI04 handle voltage fluctuations from the grid?

   Yes, it tolerates ±10% input voltage variation without affecting output regulation.

9. How long is the expected lifespan of this module?

   Typically over 10 years in normal operating conditions with occasional inspection.

10. Is it compatible with ABB Symphony Plus systems?

    While primarily for INFI 90, it may be integrated with Symphony Plus in hybrid legacy environments.