Description
ABB NGPS-12
Technical Specifications:
- Output Voltage: 24 V DC.
- Rated Current: 12 A (adjustable based on specific sub-models).
- Redundancy Method: Utilizes diode isolation or MOSFET ideal diode technology.
Functional Features:
- Seamless Switching: Achieves zero-millisecond switching to the backup power source upon primary failure, remaining completely transparent to the system.
- Current Sharing: Supports parallel current sharing among multiple power supplies to distribute load and extend overall lifespan.
- Comprehensive Monitoring: Provides relay alarm contacts for normal power, redundancy loss, and output short circuits.
Application Scenarios:
DCS/PLC system power supplies, safety interlock systems, critical process control stations, and continuous production processes where downtime is unacceptable.
Performance Parameters:
- Hold-Up Time: > 20 ms at full load, withstanding instantaneous grid voltage sags.
- Conversion Efficiency: > 90%, resulting in low power consumption and minimal heat generation.
Material Composition:
Internally utilizes high-quality electrolytic capacitors and high-frequency transformers. The housing is a metal shield providing both heat dissipation and EMI protection.
Structural Features:
Standard DIN rail mounting with clear wiring terminals and status indicator LEDs. Supports parallel clips or wiring terminals for redundancy connections.
Working Principle:
Two 24V power supplies are paralleled to the output bus via internal isolation components (diodes or MOSFETs). Under normal conditions, both share the load; if one fails, the isolation component automatically blocks reverse current, allowing the other to independently carry the full load.
Installation Requirements:
Redundant wiring must use copper conductors of equal length and cross-sectional area. Adequate cooling space must be reserved above the power supply modules.
Usage Precautions:
Never directly parallel power supplies with different output voltages or models. Regularly check the status of the redundancy monitoring relay to ensure the backup mechanism remains effective.
