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Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | M899520 TDC-2 |
| Alternate Part Number | KONE 920140 |
| Manufacturer | Valmet Automation |
| Module Type | TDC-2 Control Module |
| Primary Function | Drive/process control signal processing |
| System Family | KONE automation system |
| Designation | TDC-2 (likely Drive/Temp Control) |
| Condition | Used |
| Availability | Limited stock, surplus market |
| Market Price | ~$895 USD (per listings) |
| Stock Quantity | Multiple units available (9+ in stock) |
| Category | Automation control module / PCB board |
Product Introduction
Valmet M899520 TDC-2 is a control module with KONE 920140 alternate part number, used in Valmet Automation systems for drive or process control functions. It serves as a PCB control card for signal processing in industrial automation racks.
This module is typically sourced as used surplus from decommissioned Valmet systems, since it is an obsolete legacy part. Market listings show multiple units in stock at approximately $895 USD, indicating availability through surplus dealers
- M899520 TDC-2
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Control function not responding | Module power failure or communication fault | ✅ High | Measure module supply voltage (check 24V/48V input), verify KONE bus communication | Replace module if input power is present but no response |
| Drive control signal wrong | Input circuit or ADC failure on module | ✅ High | Test input signal at module terminals, compare to expected value | Replace module if input is correct but output is wrong |
| TDC-2 LED off or error | Module fault or supply voltage missing | ✅ High | Check supply at module terminals, verify module status LED | Check PSU and fuses before replacing M899520 TDC-2 |
| Intermittent control communication | Backplane bus contact or wiring fault | ❌ Medium | Inspect module connector, check backplane bus continuity | Clean connector and reseat module before replacement |
| Multiple control channels dead | Backplane power or master controller fault | ❌ Medium | Check backplane supply voltage, verify master controller status | Check PSU and controller before replacing module |
| Control output signal unstable | Output driver or calibration drift | ✅ High | Measure output signal with multimeter, compare to input | Replace module if output is inconsistent with input |
| Module overheats or burns | Overcurrent or shorted downstream circuit | ✅ High | Measure current draw, inspect for burnt components on PCB | Replace module and correct the shorted load |
Contact technical support with photos of the front label, part numbers (M899520 TDC-2, KONE 920140), terminal wiring, multimeter readings (supply voltage and signal values), and KONE system diagnostic log if you cannot isolate the fault.
Frequently Asked Questions
Q: Is Valmet M899520 TDC-2 still available from the factory?A: No. It is an obsolete legacy control module. You will find it only through surplus dealers as used stock from decommissioned Valmet Automation systems.
Q: What does “KONE 920140” mean?A: KONE 920140 is the alternate part number for M899520 TDC-2. They refer to the same module. KONE is likely the system family or product line name.
Q: What does “TDC-2” stand for on this module?A: TDC-2 likely stands for Drive Control or Temperature Control (version 2). It is a control module for drive/process control signal processing in Valmet Automation systems.
Q: Can I hot-swap this control module?A: Do not assume it is hot-swappable. Kill power to the rack before removal. Pulling control modules live can damage the backplane or cause control signal faults.
Q: Will configuration be lost when I swap it?A: This module is a signal processing/control card. It does not hold the PLC program, but you should verify control calibration and channel mapping after the swap.
Q: Why is it priced around $895?A: This is typical surplus pricing for used legacy automation modules. The OEM does not actively stock it, so you are buying from decommissioned systems, which sets the market price
Q: How many units are available?A: Listings show 9+ units in stock, indicating multiple surplus units are available through dealers.
Q: Is this a direct replacement for every M899520 TDC-2?A: The model number is the right first check. However, verify the alternate part number (KONE 920140) matches your installed unit. Do not assume plug-and-play without that check.
