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Phone: +86 16626708626Description
3. Key Technical Specifications
- Number of Channels: 8
- Input Type: 3-wire RTD (Pt100, Cu10, Ni100, Ni120, resistive 0-400 Ω)
- Resolution: 14 bits
- Update Cycle Time: 150 ms + 95 ms × (active channels)
- Isolation: Groupwise isolated from ground
- Rated Insulation Voltage: 50 V
- Dielectric Test Voltage: 500 V a.c.
- Power Dissipation: 1.6 W
- Current Consumption: +5 V Modulebus 70 mA, +24 V Modulebus 50 mA
- Operating Temperature: 0 to +55 °C
- Diagnostics: Open circuit, short circuit, grounded sensor detection
- Compatible MTUs: TU810, TU812, TU814, TU830, TU833
4. Product Introduction
The ABB AI830A is an 8-channel RTD input module for the S800 I/O system. It measures temperature using 3-wire RTDs such as Pt100, Cu10, Ni100, Ni120, and resistive sensors, with linearization and conversion to engineering units performed directly on the module.
Plant engineers use it in temperature monitoring loops across process industries because each channel configures independently and includes built-in diagnostics for open, short, and sensor ground faults. It drops straight into existing S800 racks with matching termination units.
- AI830A
- AI830A
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No module RUN LED | Power or backplane issue | ❌ Low | Measure voltage at module power pins | Confirm rack supply before replacement |
| Channel error LED or diagnostic alarm | Open/short in field wiring | ✅ High | Measure resistance across RTD leads at terminals | Check 3-wire connections and sensor integrity first |
| Incorrect temperature reading | Wrong sensor type selected or wiring mismatch | ✅ High | Verify channel config in controller matches installed RTD | Cross-check parameter settings against physical sensor |
| High noise or drift | Poor shielding or high cable resistance | ✅ Medium | Check cable routing and measure lead resistance | Keep leads under 500 Ω total for AI830A |
| All channels failed | MTU or module bus fault | ❌ Low | Test with known good channel | Swap MTU or check controller comms |
Contact support with module diagnostics, photos of wiring, and RTD type if issues remain after basic checks.
6. Frequently Asked Questions (FAQ)
Can I use 2-wire or 4-wire RTDs with the AI830A? Primarily designed for 3-wire. 2-wire adds lead resistance error. 4-wire is not directly supported — stick to 3-wire for best accuracy.
What condition are these units in? New Original / New Surplus from OEM stock. Each unit undergoes inbound verification, functional testing on a live S800 rack with RTD simulation, and full parameter checks before shipment.
Is this a direct replacement for the older AI830? Yes. The AI830A extends cable resistance tolerance to 500 Ω and adds broader sensor support. Match your termination unit and update any channel configs.
Do I need to configure anything before installing? Set the MainsFreq parameter for 50 Hz or 60 Hz filtering. Configure each channel for the exact RTD type. Document existing settings and take photos of terminations.
How does it handle long field wiring? Up to 500 Ω total lead resistance on AI830A. Use shielded twisted pair cable. Error increases with imbalance — keep all three wires equal length.
What warranty and testing do you provide? 1-year warranty covering functionality under normal use. We supply a test report with simulated RTD inputs, LED status, and diagnostic confirmation. Test videos available on request.
Why buy surplus instead of waiting for new factory delivery? Immediate availability versus long OEM lead times. All units pass the same rigorous QC as new production. Saves downtime when you need the part now.
