ABB states that IEPAS02 replaces IEPAS01 and is compatible with IEPAS01 and IEPAF01 in the same cabinet.
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Brand Name:
ABB
Model Number:
IEPAS02
IEPAS02 · ABB / Bailey
Regulated cabinet DC buses and N+1 power
ABB Bailey IEPAS02 120/240 VAC system power module for regulated INFI 90 cabinet buses, with documented IEPAS01 compatibility and N+1 use.
Overview
IEPAS02 is the AC-input power module used in the ABB Bailey AC Modular Power System. It accepts 120 or 240 VAC and supplies the regulated +5, +15, −15 and +24 VDC buses used by the cabinet power architecture.
The module is rated for 130 W maximum output and one mounting slot. ABB documents compatible operation with the earlier IEPAS01 and IEPAF01 modules in the same cabinet, subject to the system loading, redundancy and power-entry design.
Verified manufacturer data
| Nominal AC input | 120 or 240 VAC |
|---|---|
| 120 VAC input range | 90–132 VAC |
| 240 VAC input range | 180–264 VAC |
| Input frequency | 47–63 Hz |
| 120 VAC input current | 2.25 A typical; 3.00 A maximum |
| 240 VAC input current | 1.40 A typical; 1.55 A maximum |
| Inrush current | Less than 5 A peak for 100 ms |
| Typical power factor | 0.7 |
| Input current crest factor | 3 |
| Input THD | 5% |
| Regulated outputs | +5, +15, −15 and +24 VDC system buses |
| Maximum output power | 130 W |
| Line regulation | Less than 0.5% on all outputs |
| Hold-up time | 17 ms at full load |
| Maximum heat dissipation | 30 W |
| Mounting space | One MMU or PMU slot |
| Room ambient | 0 to 55 °C (32 to 131 °F); module ambient maximum 70 °C |
| Relative humidity | 5–90% to 55 °C; 0–45% at 70 °C, noncondensing |
| Altitude | Sea level to 3 km (1.86 mi) |
| Atmosphere | Noncorrosive |
System fit
ABB states that IEPAS02 replaces IEPAS01 and is compatible with IEPAS01 and IEPAF01 in the same cabinet.
The AC Modular Power System supports N+1 power-module arrangements when cabinet load and installed hardware are engineered accordingly.
ABB evolution planning literature treats migration from the older Modular Power System as a system-level project toward MPS III. It is not a drop-in part substitution and requires cabinet, bus, loading and lifecycle planning.
Maintenance context
One or more regulated DC buses fall outside the expected range and the load, module status and power-entry path must be separated.
The cabinet continues operating after one module fails but no longer has the intended N+1 margin.
A line event or source transfer causes resets, leading to checks of input range, hold-up, loading and power-entry operation.
A fully loaded cabinet runs near its ambient limit and power-module heat plus airflow needs review.
Field practice
Use the installed module loads for +5, +15, −15 and +24 VDC. Maximum total wattage alone is not enough; each bus and the cabinet redundancy target must remain within the power-system design.
Verify the 120/240 VAC configuration, input protection and power-entry wiring before service. Record the normal and alternate sources where redundant feeds are installed.
A cabinet may remain online after one module loss, but the redundant margin is gone. Treat replacement as a reliability action and investigate any concurrent bus alarm.
The manufacturer system supports module service features, but live power work is hazardous. Only trained personnel following ABB and site electrical-safety procedures should perform it.
Source record
| Manufacturer | Document | Document no. / version | Link |
|---|---|---|---|
| Elsag Bailey | AC Modular Power System Instruction (manufacturer-issued; archived copy) | I-E96-506B1 | Open document |
Order support
Test scope and unit condition are confirmed before dispatch, with ESD-safe export packing. DOA, returns, warranty and after-sales support follow the quotation.
Product-specific answers
The AC Modular Power System provides regulated +5, +15, −15 and +24 VDC buses for cabinet modules.
Yes. The manufacturer instruction states that it replaces IEPAS01 and can coexist with IEPAS01 and IEPAF01 in the same cabinet.
The documented ranges are 90–132 VAC for 120 V nominal service and 180–264 VAC for 240 V nominal service at 47–63 Hz.
Calculate the load on each regulated bus and total cabinet power, then confirm the required N+1 margin. Do not size the system from the 130 W total alone.
The original system documentation describes service features, but energized work is hazardous. Only qualified personnel following ABB and site procedures should decide and perform it.
Provide the input voltage, installed power-module mix, cabinet or MMU type, quantity, destination, required date and system model.
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