Product Core Brief
- Model: IEPAS01
- Brand: ABB
- Series: Bailey Infi 90 / Harmony rack hardware
- Core Function: Supplies regulated +5, +15, -15, and +24 VDC to process control and I/O modules in an Infi 90 rack.
- Product Type: AC system power supply module
- Key Specs: Multi-rail DC output | N+1 redundant sharing | Harmony/Infi 90 rack mount
- Condition: New Original / New Surplus (subject to available stock)
Key Technical Specifications
| Parameter | Detail |
|---|---|
| Product Type | AC system power supply module |
| Compatible System | ABB Bailey Infi 90 / Harmony rack |
| Input Power | AC mains (confirm exact rating on nameplate) |
| Output Rails | +5 VDC, +15 VDC, -15 VDC, +24 VDC |
| Redundancy | N+1 load sharing |
| Mounting | Rack / backplane module |
| Typical Use | Process control modules, I/O racks, DCS power distribution |
| Protection | Power isolation, module-level protection |
| Packaging | Anti-static, industrial shipping pack |
| Availability | In-stock surplus / OEM replacement |
Product Introduction (No Fluff)
The ABB IEPAS01 is an AC system power supply module used in Bailey Infi 90 and Harmony rack systems. It converts incoming AC power into multiple regulated DC rails and distributes them across the rack to keep controllers, I/O, and process modules running.
Its main advantage is N+1 redundancy. Multiple units share the load, so a single module failure does not automatically trip the rack. That makes this unit practical for legacy DCS maintenance, planned sparing, and fast replacement when downtime windows are tight.
QA & Testing SOP (Dynamic & Transparent)
Every unit goes through a visual and electrical check before shipping.
- Incoming inspection: Verify model marking, housing condition, connector pins, and label consistency. Cross-check against OEM documentation.
- Anti-counterfeit check: Inspect PCB finish, label font, serial formatting, connector quality, and mounting hardware for non-OEM signs.
- Bench power-up: Apply rated AC input on a controlled test supply. Confirm soft-start behavior, fan operation if equipped, and absence of abnormal noise or heating.
- Output rail verification: Measure +5, +15, -15, and +24 VDC with a calibrated multimeter. Check regulation, ripple, and cross-load stability.
- Redundancy simulation: When test fixtures allow, validate load-sharing behavior with a second compatible unit or simulated parallel condition.
All units are packed in anti-static bags with edge protection. If a nameplate rating is unclear, we hold the unit and request confirmation rather than guessing.
Installation Pitfalls & Guide (Engineer to Engineer)
This is a rack power module, not a plug-and-play field device. Treat it like backbone infrastructure.
❗ Do not assume input voltage. Infi 90 power modules can have different AC ratings. Confirm the nameplate before energizing.
❗ Respect N+1 rules. Removing the only active supply while the rack is live can drop the backplane. Verify redundancy status first.
❗ Check backplane contacts. Bent pins or oxidized connectors cause intermittent faults that look like module failure.
❗ Grounding matters. A floating rack ground or poor cabinet earth can introduce noise into analog and communication cards.
Replacement steps
- Pre-install: Confirm model, input rating, output rails, and rack slot compatibility.
- Removal: Reduce load or confirm redundant units are active. Loosen mounting hardware and withdraw the module evenly.
- Install: Inspect backplane pins, seat the module fully, and secure mounting screws to spec.
- Power-on test: Measure each DC rail, confirm alarm LEDs, and verify rack health before returning to full load.
Technical FAQ
Is the IEPAS01 still available?
Yes, we carry it as new surplus and OEM replacement stock. Availability changes by batch, so confirm current quantity before planning a shutdown.
Can I use it as a direct replacement?
In most Infi 90 / Harmony rack applications, yes. Still verify the input voltage code, output rating, and firmware or hardware revision against your existing module.
What is the warranty?
Typical surplus warranty runs 30–90 days, depending on stock condition. New original units may qualify for longer coverage. We state the exact term on the quote.
Does it support hot-swap?
Only when the rack is configured for N+1 redundancy and the remaining supplies can carry the full load. Never pull the last active supply without confirming rack status.
Can you test it before shipping?
Yes. We perform bench power-up, output rail checks, and visual authenticity inspection. If your site requires a test report, ask before ordering.
