ABB Bailey IEPAS01 | Power Supply Module

This power supply module provides DC power to all INFI 90 rack components. It converts incoming AC line voltage into stable outputs for logic and I/O. The unit mounts in the leftmost slot of the INFI 90 rack.

Technical specifications

Parameter	Specification
Brand	ABB Bailey
Model	ABB Bailey IEPAS01
Product Family	INFI 90
Category	Power Supply Module
Input Voltage	120/240V AC (selectable)
Input Frequency	47 to 63 Hz
Input Current	2.5A at 120V AC, 1.25A at 240V AC
Output Voltage 1	+5V DC
Output Current 1	15A continuous
Output Voltage 2	+15V DC
Output Current 2	3A continuous
Output Voltage 3	-15V DC
Output Current 3	2A continuous
Output Voltage 4	+24V DC (isolated)
Output Current 4	2A continuous
Output Voltage 5	+12V DC
Output Current 5	1A continuous
Output Voltage 6	-12V DC
Output Current 6	0.5A continuous
Total Output Power	150 Watts maximum
Hold-up Time	25 ms at full load
Efficiency	Approximately 82%
Component Count	1 main PCB, 1 transformer, 15 capacitors, 1 fan
Energy Storage	6 x electrolytic capacitors (1500 µF each)
Cooling Method	Internal fan with front intake
Dimensions (L x W x H)	Approx. 30 cm x 15 cm x 12 cm
Weight	Approx. 2.4 kg
Operating Temperature	0°C to 55°C
Mounting	INFI 90 rack slot (leftmost)

Detailed Technical Analysis

This power supply module accepts either 120V or 240V AC input voltage. You select the correct voltage using a slide switch on the side. The unit then produces six regulated DC outputs for the rack. The +5V rail delivers up to 15 amps for logic circuits.

Now let us examine its output capabilities. The +15V and -15V rails power analog circuits and op-amps. The isolated +24V rail supplies power to field devices and relays. The ±12V rails support communication modules and specialty I/O. Six large capacitors store energy for 25 milliseconds of hold-up time.

This power supply uses an internal fan for forced air cooling. The fan draws air through the front grille and exhausts from the rear. The ABB Bailey IEPAS01 weighs 2.4 kilograms for stable rack mounting. The module achieves approximately 82% efficiency under normal load.

Installation and Configuration Guidelines

You mount this power supply in the leftmost slot of an INFI 90 rack. Connect the AC input wires to the terminal block on the front. Use 12 AWG or larger wire for the AC supply connection. The module automatically distributes DC power to the backplane.

For safety, connect a proper earth ground to the grounding terminal. Do not exceed the maximum output current on any rail. The internal fan requires adequate clearance for air intake. Leave at least 7 centimeters of space in front of the grille.

Practical Applications

Engineers use this power supply for INFI 90 system power and restoration. It powers large racks with multiple logic and I/O modules. This component also works in legacy DCS retrofit projects. Its 150-watt capacity suits high-density INFI 90 configurations.

Summary of Features

To conclude, this power supply delivers 150 watts with six regulated DC outputs. It weighs 2.4 kilograms and includes an internal cooling fan. Choose ABB Bailey IEPAS01 for reliable rack power in INFI 90 systems.