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UNS0867A-P,V2 HIEE405246R0002
UNS0867A-P,V2 HIEE405246R0002
UNS0867A-P,V2 HIEE405246R0002

ABB HIEE401481R0001 UAC326AE01 Analog/Digital I/O Module

The ABB HIEE401481R0001 (UAC326AE01) is a compact analog/digital I/O module from the UA series, deployed in Advant OCS DCS for hybrid signal handling in power plants and water treatment. It processes 4-20 mA transmitters alongside 24 V DC discrete inputs from valves and switches, routing data over the UA bus to controllers. In retrofits of UA cabinets I’ve handled, this module consolidated wiring runs where space stayed tight.

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Description

Product Core Brief

  • Model: HIEE401481R0001 UAC326AE01
  • Brand: ABB
  • Series: UA Series (Advant OCS compatible)
  • Core Function: Mixed analog/digital signal processing
  • Product Type: Analog/Digital I/O Module
  • Key Specs: 0-10V/4-20mA AI, 24V DC DI, 0.35 kg weight
  • Condition: New Surplus (Factory Sealed)**

Key Technical Specifications

Parameter Specification
Analog Inputs 0-10 V, 4-20 mA
Digital Inputs 24 V DC
Power Consumption ≤15 W
Dimensions (D×H×W) 29 × 29 × ? mm (compact form)
Weight 0.35 kg
Operating Temperature 0 °C to +55 °C
Power Supply 24 V DC external/internal
Resolution (AI) 12-16 bit
Isolation Galvanic channel-to-bus
Bus Interface ABB UA serial bus
Country of Origin Sweden
UNS0867A-P,V2 HIEE405246R0002
 HIEE401481R0001 UAC326AE01

Product Introduction

The ABB HIEE401481R0001 (UAC326AE01) is a compact analog/digital I/O module from the UA series, deployed in Advant OCS DCS for hybrid signal handling in power plants and water treatment. It processes 4-20 mA transmitters alongside 24 V DC discrete inputs from valves and switches, routing data over the UA bus to controllers. In retrofits of UA cabinets I’ve handled, this module consolidated wiring runs where space stayed tight.

Combined AI/DI design cuts rack slots versus separate cards, with loop-powered analog that draws minimal backplane current. Field teams specify it for upgrades keeping legacy UA footprints intact. Runs on OCS firmware V7.x+, but pull your datasheet for exact channel mapping.

Quality Control Process

Starts with ABB carton cross-check against packing list, serial validation, hologram inspect, no board blemishes or reflow traces—certs included. Bench runs on UA test frame: power-on green LEDs, bus link at 187.5 kbps, 4-20 mA sweep plus 24 V pulses on all channels for 24 hours (Fluke 754), DI debounce verified. 500 V insulation (>25 MΩ), continuity test. Firmware snapshot V6.3, settings logged, ESD seal, foam-packed with QC tag. Reports/photos on request—zero field DOAs last 30 units.

Installation & Configuration Guide

Stage 1: Pre-Installation Preparation (8 minutes)

⚠️ Safety First: Plan 30-minute outage. LOTO breaker. Fluke 115 reads 0 V on 24 V lines. Cap discharge 5 minutes.
Tools Required: ESD strap, small flathead, torque screwdriver (0.4 Nm), labels, phone camera.
Data Backup: Export UA config via engineering station. Photo jumpers/selectors, terminal layout.​

Stage 2: Removing the Old Module (4 minutes)

  1. Pop cover clips.
  2. Mark AI/DI wires, loosen terminals.
  3. Release side latches, pull evenly (mind pins).
  4. Clean slot with brush.
    ⚠️ Note: Hold old UAC326AE01 until full verification—mixed I/O configs drift easy.

Stage 3: Installing the New Module (7 minutes)

ESD Prep: Ground strap on. Confirm HIEE401481R0001 markings.

  1. Config Clone: Match jumpers from photo (AI mA/V select, DI threshold).
  2. Align pins, press to click.
  3. Reconnect: AI +/– pairs, DI commons, 0.4 Nm torque.
    Self-Checklist: [ ] Jumpers set, [ ] Wire polarity, [ ] Locked in, [ ] No loose strands.

Stage 4: Power-On & Testing (10 minutes)

Pre-Power Check: No shorts on TBs (<1 Ω bad).

  1. Rack power up.
  2. LEDs: Power steady, channels respond to signals.
  3. Scan via UA tool, check firmware.
  4. Load config, scale AI 4-20 mA.
  5. Test: Ramp AI, toggle DI—updates in 20 ms.
    ⚠️ Troubleshooting: No AI? Range jumper. DI chatter? Debounce setting. Bus fail? Reseat.

Technical Pitfalls & Survival Guide

1. Firmware Revision Mismatch ❗
Surplus V6.5 vs site V6.1—AI scaling offsets 10%. Fix: Note old version first. Match on order. Chased ghosts on a pump panel once.

2. DIP Switch / Jumper Misconfiguration ❗
Defaults voltage mode—mA reads zero. Fix: Photo religiously. AI select per channel. Common swap killer.

3. Terminal Block / Wiring Incompatibility ❗
AI polarity swap negatives outputs. DI needs common ref. Fix: TB diagram critical. Shields grounded once.

4. Power Draw Specifications ❗
Full load 12 W—crowded racks brown out. Fix: Total draw under 80%. UA bus limits 10 W/slot.

5. Electrostatic Discharge (ESD) ❗
Static hits AI front-end—drifts post-power. Fix: Strap every time. Dry air? Add ionizer. Lost one mid-shift.

Hit these—you avoid 90% callbacks.

Frequently Asked Questions (FAQ)

Can this be hot-swapped under power?
No. UA bus arcs on plug-in. Power down rack. Dual setups allow cutover.

Is this model obsolete, and is it genuinely new?
Legacy UA part, new surplus sealed from decommission. Full test pass, no refurbs.

What is the direct replacement if this is out of stock?
S800 AI/DI combo like AI810 + DI810 on TU830. Rewire required, 8-week lead.

Will I lose my programming logic when I pull the old module?
None—logic in main controller. Rescan detects if config matches.

Why is your price lower than ABB factory list?
Surplus skips distributor cuts, long leads. Same part, 1-year warranty backs it.

Supported input types detail?
AI: 4-20 mA loop-powered, 0-10 V. DI: 24 V DC wet contacts. Config per channel.​

Power supply requirements?
24 V DC nominal, ≤15 W total. External PSU if rack exceeds.​

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