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Phone: +86 16626708626Description
Key Technical Specifications
- Model: 1TNA920733R0002
- Brand: ABB
- Series: M102-P, M10x
- Function: Motor control and protection unit
- Communication: Profibus DPV1
- Current Transformer Range: 0.24-63.0 A
- Digital Inputs: 240 VAC
- Auxiliary Supply: 240 VAC
- Application: Industrial motor protection and control
- Net Weight: 1,008 g
- Condition: New
- Compatibility: Verify exact motor starter and wiring scheme before installation
Product Introduction
ABB 1TNA920733R0002 is an M102-P motor control and protection unit used in industrial motor systems. It combines motor monitoring, protection logic, and Profibus DPV1 communication in one package.
This unit is typically selected for replacement work where the existing motor control architecture must stay aligned with ABB M10x hardware. Verify the CT range, auxiliary supply, and field wiring before ordering.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Unit has no display or does not power up | Missing 240 VAC auxiliary supply, blown fuse, or wiring issue | ✅ High | Measure auxiliary supply at the unit terminals with a meter | Check supply and fuse first |
| Profibus communication is lost | Wrong node address, cabling fault, or bus termination issue | ✅ High | Inspect the Profibus cable, termination resistors, and address settings | Verify network setup before replacing the unit |
| Motor trips too early | CT range mismatch or wrong protection settings | ✅ High | Compare the configured CT range with the motor nameplate | Recheck the settings before calling the unit faulty |
| Digital inputs do not respond | Incorrect 240 VAC input wiring or external contact issue | ✅ High | Measure voltage at the digital input terminals and test the external contact | Verify field wiring first |
| Protection alarms appear after startup | Configuration mismatch or actual motor fault | ✅ High | Review the alarm code and compare it to the motor operating state | Fix the real motor issue before swapping hardware |
| Values appear wrong but the unit is stable | CT polarity error or parameter mismatch | ⚠️ Medium | Check CT polarity and compare measured current with the displayed value | Correct wiring and settings before replacement |
If you are stuck, send photos of the unit, terminal wiring, and alarm log to technical support.
- 1TNA920733R0002
- 1TNA920733R0002
Frequently Asked Questions
Q: What is the ABB 1TNA920733R0002 used for?
A: It is an ABB M102-P motor control and protection unit used for industrial motor monitoring, protection, and Profibus DPV1 communication.
Q: Is this part obsolete?
A: The listing information points to a current or available unit, but I would still verify stock status and exact revision before buying.
Q: Can it replace another ABB M10x unit?
A: Sometimes, but not blindly. You need to confirm CT range, auxiliary supply, communication setup, and terminal compatibility first.
Q: Is it hot-swappable?
A: No. Power down the circuit before removal. Pulling it live can damage the unit or create a control fault.
Q: Why is surplus cheaper than factory new?
A: Because surplus usually comes from excess inventory, project closeouts, or recovered stock. A lower price is acceptable only when the condition and testing status are clear.
Q: What should I verify before ordering?
A: Confirm the full part number, CT range, 240 VAC supply, Profibus details, and motor starter compatibility. That avoids the common mistake of buying the right family but the wrong configuration.
