ABB Bailey NPSM02 Power Supply Module

This power supply module provides reliable DC power for ABB Bailey INFI 90 automation systems. The ABB Bailey NPSM02 converts AC input into regulated outputs for logic and field circuits. A compact design fits into standard INFI 90 rack slots without modification. Consequently, plant engineers can power entire control cabinets from a single module.

Technical Specifications of the Power Supply Module

The ABB Bailey NPSM02 measures 120 mm in width and 260 mm in height. Its depth reaches 140 mm for standard rack mounting. The module weighs approximately 2.2 kg including all internal components and heat sinks. A single front panel LED shows output voltage status and fault conditions. The rear side uses a 24-pin backplane connector for power distribution. This design stores minimal energy in small filtering capacitors only. Therefore, the module contains no batteries for energy storage.

Parameter	Specification
Brand	ABB Bailey
Full Model	NPSM02
Category	Power Supply Module
Dimensions (W x H x D)	120 mm x 260 mm x 140 mm
Weight	Approximately 2.2 kg
Input Voltage	85-264V AC or 110-300V DC
Input Frequency	47-63 Hz
Output 1	+5V DC at 15 A
Output 2	+24V DC at 6 A
Output 3	-15V DC at 1.5 A
Total Output Power	150 W maximum
Backplane Connector	24-pin
Energy Storage	Minimal (filtering only)
Efficiency	84% typical
Protection Features	Overvoltage, overcurrent, short circuit
Hold-up Time	15 ms at full load

Functional Features and Power Distribution

The ABB Bailey NPSM02 includes overvoltage and overcurrent protection on all outputs. You can operate the module in single or redundant power configurations. The unit automatically switches between AC and DC input sources without interruption. A front panel test point allows quick voltage verification during troubleshooting. Consequently, this power supply module ensures stable operation for INFI 90 I/O and CPU modules.

Installation and System Integration

You must install this power supply module into a dedicated INFI 90 rack slot. The ABB Bailey NPSM02 connects to the backplane automatically upon full insertion. The module requires adequate clearance around its ventilation slots for cooling. A protective cover shields AC input terminals from accidental contact. Always verify total load current before adding modules to the rack system.

Maintenance and Operational Benefits

Because the ABB Bailey NPSM02 uses no battery, it needs no periodic battery replacements. Technicians can replace the module without losing any system configuration or user data. The forced-air cooling system includes a field-replaceable fan assembly. Consequently, this power supply offers long-term reliability with simple maintenance procedures.